Highly BSA418CV-R1AUN R134a Mini Rotary Compressor: Specifications, Model Code and Selection Guide

By AUTHOR_NAME, AUTHOR_JOB_TITLE, Qishanr Technologies Co., Limited | Published: YYYY-MM-DD | Last updated: 2026-09-23

Key facts at a glance

What is the Highly BSA418CV-R1AUN?

Highly BSA418CV-R1AUN is a hermetic single rotary compressor for R134a, catalogued at 4.18 cc/rev displacement and 440 W of cooling capacity, which converts to 1,501 Btu/h. Its manufacturer, Shanghai Highly (Group) Co., Ltd., publishes the base type BSA418CV inside a catalogue section headed Dehumidifier Compressor, in the series A constant-speed R134a group for a single-phase 220-240 V 50 Hz supply. That grouping is the clearest published statement of what the model is for, and the Highly rotary compressor catalogue is the document this guide reads it from. On this site the same base type sits in the Highly rotary compressor range, where the live records carry the suffixes -R1AUA and -R1AN rather than -R1AUN.

The two live records for the family are the BSA418CV-R1AUA product page, which carries the same base type and the same 220-240 V 50 Hz supply as the model discussed here, and the BSA418CV-R1AN page, which carries the same base type on a 60 Hz supply. Both sit beneath the site's parent category of rotary compressors for air conditioning and refrigeration.

Three things have to be settled before the numbers are usable, and none of them can be settled by picking whichever figure looks best. The first is that the exact string BSA418CV-R1AUN has no page on this site, so every rated value below is inherited from the base type rather than read from a page for this model. The second is that the two live sources disagree on efficiency: the catalogue prints COP 2.10 W/W for BSA418CV while the store pages print a flat 3 W/W. The third is that the store's own bullet block and specification table disagree with each other on the 60 Hz relatives of this model. All three are handled below, and each figure in this guide is labelled with where it comes from.

Technical specifications

The published block is internally consistent on the unit conversion, which matters because it is the only cross check available on this model. Converting 440 W to imperial units at 3.412 Btu/h per watt gives 1,501 Btu/h, which is the figure the catalogue prints, and working the arithmetic the other way, 1,501 Btu/h divided by 3.412 returns 440 W. The store page prints 1,500 Btu/h for the same 440 W, a difference of 0.07 percent, which is a rounding difference rather than a second test point. So the capacity figures on the two documents describe the same measurement, and the disagreement between them is a display artefact, not a specification conflict.

The COP row cannot be checked the same way, and this is the one place where the two documents genuinely part company. Dividing 440 W of cooling by a COP of 2.10 implies an input of about 210 W. Dividing the same 440 W by a COP of 3 implies about 147 W. Those cannot both be right for one compressor at one test point, so at least one of the two published values is not a measured COP at the stated condition. This guide reports both and does not choose between them.

What neither document prints is input power, weight or sound power for this model, so none of those appear above. A dehumidifier is often specified on noise as much as on capacity, so the absence of a sound figure is a real gap rather than a formality, and it is the first thing to request on the datasheet. The same applies to the input power, because the electrical design of the appliance depends on it and it cannot be recovered reliably from a COP that two sources disagree about.

What does the model code BSA418CV-R1AUN actually tell you?

The manufacturer's catalogue carries an explicit model identification key rather than leaving the string to be guessed, and that key is the most useful published artefact for this model. It splits the characters into three jobs: a compressor family prefix, a numeric displacement block, and a trailing power supply letter. Reading BSA418CV against that structure gives a family prefix B S A, a numeric block 418, and a trailing letter V.

The trailing letter is the part that can be verified three ways, which is why it carries weight here. The manufacturer's power supply key defines it directly. The catalogue's own table layout repeats it by grouping every V suffix model under a 220-240 V 50 Hz heading. And the store pages obey it in practice: the page for the -R1AUA suffix of this base type prints 220-240 V 50 Hz single phase, the -R1AN page prints 208-230 V 60 Hz single phase, and the BSA418CW-R1AN page prints 115-120 V 60 Hz single phase, each matching the letter in its own base type. The key is reproduced below exactly as the catalogue prints it.

What the key does not do is explain the suffix. The string after the base type, R1AUN, is not covered by the identification key, and the key publishes its compressor base type and starting method tables as image graphics with no text layer, so those two tables cannot be read from the document reviewed here. The same suffix family does appear on live store pages as R1AUA and R1AN, so R1AUN is one member of a set rather than an isolated typographic slip, but the meaning of each character is not published anywhere this guide can reach. Read it as a configuration suffix specifying the order build, and route the exact meaning to the supplier rather than inferring it from the letter shapes.

The numeric block has a transparent meaning and needs no key. The 418 in BSA418CV is the displacement class, and it is not a rounded marketing figure: the catalogue prints 4.18 cc/rev for the row, and the store pages print 4.18 mL/rev for every suffix of this base type, including the R1AUA, R1AN and R1AUN variants. A cubic centimetre and a millilitre are the same volume, so the two notations agree exactly, and the number in the model string is the number in the specification table.

Performance characteristics

The performance profile of this model follows directly from two facts: it is a constant-speed rotary rather than a variable-speed machine, and it is a small-displacement compressor at 4.18 cc/rev. Constant-speed operation means the compressor runs at a fixed rotational speed governed by the 50 Hz mains frequency and modulates capacity by cycling on and off, rather than by changing speed. For a dehumidifier that is a deliberate trade: cycling control is simpler, cheaper and has no inverter electronics to fail or to generate conducted noise, but it holds the coil at one operating point, so the appliance's efficiency depends on matching the compressor's single rated point to the moisture load the product is expected to see.

The 4.18 cc/rev displacement places this base type in the low end of the family. The catalogue prints the same 220-240 V 50 Hz R134a constant-speed group across ten base types from 2.72 cc/rev to 8.04 cc/rev, and 4.18 cc/rev sits fourth from the bottom in that list. That matters for selection because the smaller members of the group are the ones aimed at portable and cabinet-scale equipment, where the physical envelope is constrained. The catalogue puts the overall height of this base type at 143.0 mm, which is the lowest figure in the group, tied with the two smaller displacements and below the 162.6 mm to 177.6 mm range of the larger ones.

Efficiency is where this model is least well documented, and the honest reading is that the published efficiency is disputed rather than merely absent. The catalogue assigns COP 2.10 W/W to base type BSA418CV, which makes it the second lowest value in its own ten-row 220-240 V 50 Hz group, where the values run from 2.10 to 2.78. The store pages assign a flat 3 W/W to every suffix of the same base type. A flat value repeated across a whole family is a strong signal that it is a placeholder rather than a measured result, because compressor COP varies with displacement, and it certainly cannot be identical across models the catalogue measures at 2.10, 2.15, 2.62, 2.77 and higher. Treat the catalogue's model-specific 2.10 W/W as the figure with a traceable basis and ask the supplier to confirm it against a datasheet before using efficiency as a purchasing argument.

The catalogue also documents the electrical hardware that goes with the compressor, which the store pages omit. This base type is listed with a 6.5 microfarad, 400 V run capacitor. That is a design input rather than a courtesy note: a dehumidifier controller has to switch and protect a capacitor of that value, and the start and run behaviour of the appliance depends on it. Because the catalogue lists a separate capacitor value for every displacement in the group, matching the capacitor to the compressor is part of the selection rather than part of the installation.

How is the 440 W capacity actually rated?

A capacity figure is only comparable with another capacity figure when both carry the same stated test condition, and this is where a published number most often misleads a buyer. The catalogue states its condition for this row as ASHRAE/T, and it also publishes the definition of that condition, so the 440 W can be placed precisely rather than accepted on trust. The five temperatures below are the definition of ASHRAE/T as the catalogue prints it.

The catalogue runs four separate conditions through its tables, and knowing which one a row belongs to is the difference between a comparable number and a misleading one. The same document defines the other three, which lets a buyer see how far the rated point sits from the service conditions an actual dehumidifier will meet.

Two consequences follow from that table, and both work in the buyer's favour here. The first is that ASHRAE/T is a mild condition rather than a hard one. Its 7.2 degC evaporating temperature is well above freezing, so the 440 W describes a compressor running with a warm, wet evaporator coil, which is exactly the regime a dehumidifier works in when it is pulling moisture out of room air. A capacity figure quoted at a freezing evaporating temperature would be a poor guide to dehumidification duty, and it is worth checking which condition sits behind any competing quotation. The second is that this model's row is the only condition the catalogue applies to it. It does not publish a refrigeration or freezing figure for base type BSA418CV, so no low-temperature capacity can be quoted for this model from this document.

It is also worth separating this compressor test condition from the appliance standard that governs a finished dehumidifier. They are different things measured at different levels, and the section on standards below sets out the appliance side. Briefly, a compressor rated at ASHRAE/T is rated as a component on a bench, while a dehumidifier is rated as a product on an airflow, and the two numbers are not interchangeable.

The refrigerant: what R134a is, and what the sources do not say

The catalogue files this model under a refrigerant that carries regulatory weight, so the substance is worth describing precisely rather than treating as a label. R134a is a single-component hydrofluorocarbon, not a blend, which distinguishes it from R410A and from the HFC and HFO blends that appear on the same tables. Its identity and its number are published by the standard body that assigns refrigerant designations.

The global warming potential is the number that drives the commercial conversation, and it is worth stating plainly what it means and where it comes from. The German Environment Agency publishes a GWP table explicitly keyed to Regulation (EU) 2024/573, and in that table HFC-134a carries 1,430 in the F-gas Regulation column, 1,430 in the AR4 column and 1,300 in the AR5 column. The same table prints 675 for HFC-32 and 3,500 for HFC-125, which is a useful internal check: those two values also appear on the European Commission's own refrigerant pages, so the table is consistent with the regulation it cites rather than a standalone figure.

That 1,430 is the reason a European or European-facing appliance design has to treat R134a as a transitional choice rather than a resting place. The European Commission's page on climate-friendly alternatives to F-gases in refrigeration sets out the prohibition dates by equipment class, and the ones that bite on small equipment are the stand-alone equipment and condensing unit classes, where the gate tightened to a GWP of 150 or more from 1 January 2022 for HFCs and to any other F-gas with a GWP of 150 or more from 1 January 2025. R134a, at 1,430, sits far above those thresholds.

The Commission page also names the substances positioned as replacements, and R134a appears repeatedly in the "Replacement for" column, which is the clearest published signal of where this refrigerant sits in the transition. On the same page, R-471A, R-515B and R-513A are all listed as replacements for R-134a in one or more equipment classes, alongside the non-fluorinated options R-600a, R-290 and R-744. The Commission states on that page that in domestic refrigeration R-600a, isobutane, has proven to be more energy-efficient than R-134a, which is worth knowing if this compressor is being considered for a product that could equally be built on a hydrocarbon. The full legal text behind those tables and dates is Regulation (EU) 2024/573 on fluorinated greenhouse gases.

What no source used here prints is R134a's ASHRAE safety group, and it is deliberately left blank above rather than filled from inference. It is not safe to carry the classification over from another refrigerant: R-32 is A2L and R-290 is A3 on the Commission's tables, but neither tells you anything about R134a, and the two are different substances with different flammability behaviour. If the appliance is being placed on a market that requires the safety group, request it on the datasheet rather than assuming it.

Which applications suit the Highly BSA418CV-R1AUN?

The application evidence for this model comes from three separate places that do not agree, and the disagreement itself is informative. The manufacturer's catalogue places the base type inside a section headed Dehumidifier Compressor. The store's second domain record for the same family prints Cabinet AC and Dehumidifier. The store's main domain prints a broader and more generic line: AC, drier, refrigeration, chiller, etc. Read together, they converge on small moisture-removal and small cooling duty, with the catalogue and the second domain being the specific evidence and the main domain being the generic one.

• Dehumidifiers. This is the strongest published fit, because the manufacturer's own catalogue groups the base type under dehumidifier compressors and the family's 4.18 cc/rev displacement matches the capacity class of portable and cabinet dehumidifiers. An ASHRAE/T rating with a 7.2 degC evaporating temperature is also the condition a dehumidifier actually runs at, so the rated figure is usable here rather than being an extrapolation.
• Cabinet air conditioning. The second domain lists Cabinet AC as an application for this family, and the low 143.0 mm envelope suits equipment where height is constrained. The catalogue rates the base type at a 35.0 degC ambient, which is consistent with a cabinet unit working in a conditioned or semi-conditioned space.
• Refrigeration and chillers at modest duty. Both store domains list refrigeration and chiller in the usage line. Because the catalogue publishes no refrigeration or freezing row for base type BSA418CV, no low-temperature capacity is quoted for this model in this guide, and a chiller or refrigeration application would need that figure from the supplier.
• Small driers and air treatment equipment. The drier application appears in the main domain usage line. This is a plausible fit for a 4.18 cc/rev constant-speed compressor, since the duty is steady and the tightest constraint is usually envelope rather than capacity modulation.
• OEM replacements in the same displacement class. Because this base type is one of ten in the catalogue's 220-240 V 50 Hz R134a group, it is also a candidate where an existing appliance is being re-sourced within the same displacement class. In that case the height, the capacitor value and the supply letter all have to be matched, not just the capacity.
• Not this model, on the evidence reviewed: heat pump duty. No source used here lists a heat pump application for this base type, and no heating capacity is published for it. Do not assume one.

One descriptor needs a caution. The model is widely described in trade listings as a mini rotary compressor, and its 4.18 cc/rev displacement and 143.0 mm height are consistent with that description. However, the word mini does not appear on the product pages or in the catalogue section title for this family. Treat mini as an informal class label for the displacement range rather than as a published product attribute, and specify the model string and the displacement when ordering.

Selection advantages, stated plainly

Taking the published evidence on its own terms, six reasons to consider this model hold up, and three commonly quoted ones do not. The list below separates them.

• The rating condition is the one the application actually runs at. Because the catalogue rates this base type at ASHRAE/T with a 7.2 degC evaporating temperature, the 440 W is a dehumidification-relevant figure rather than a mild-ambient air conditioning figure. That is a genuine advantage over a compressor whose headline capacity is quoted at a condition the appliance will never see.
• The physical envelope is the smallest in its family. At 143.0 mm overall height, this base type is the lowest in the catalogue's ten-row 220-240 V 50 Hz R134a group, tied with the two smaller displacements and shorter than every larger one. For a portable dehumidifier or a cabinet unit, height is often the binding constraint.
• The displacement class is documented all the way across the range. The catalogue publishes the same 220-240 V 50 Hz R134a constant-speed group from 2.72 cc/rev to 8.04 cc/rev, so a design can be moved up or down the displacement ladder within one documented family rather than re-sourced from a different supplier and a different set of documents.
• The electrical hardware is specified, not implied. The catalogue prints a 6.5 microfarad, 400 V run capacitor for this base type, so the control design has a stated component value to work from instead of a range to guess at. The store pages omit this entirely.
• R134a remains a practical refrigerant for small equipment in many markets. The Commission's tables show that the prohibitions that bite on R-134a sit in specific equipment classes, and that R-134a is widely used outside the markets that have adopted those gates. For an appliance aimed at a market without an equivalent F-gas gate, the refrigerant is a low-friction choice with a large installed base and a broad service network.
• The base type spans several supply voltages under one design. The same 4.18 cc/rev displacement appears as catalogued base types for 220-240 V 50 Hz, 208-230 V 60 Hz and 115-120 V 60 Hz, which means a product family can be built for several markets around one mechanical design rather than three.

What the advantages do not include

• No efficiency advantage is claimed. The catalogue's 2.10 W/W for this base type is the second lowest in its own group, and the store's flat 3 W/W is not credible as a family-wide measured value. Do not present this model as a high-efficiency choice on the evidence reviewed.
• No noise advantage is claimed. The catalogue row carries no sound figure and the store pages publish none. The generic range copy mentions low sound, but the same copy block is reused across other compressor brands on this site, so it is site copy rather than model data.
• No capacity modulation is claimed. This is a constant-speed machine. Where a load varies widely and the appliance must hold efficiency across it, a variable-speed compressor is the appropriate class, and nothing here suggests otherwise.

How does BSA418CV-R1AUN compare with the other Highly R134a 4.18 cc/rev models?

The most useful comparison is not against other displacements but against the published suffixes of this same 4.18 cc/rev base type, because those are the records a buyer can actually open. The table below places every published 4.18 cc/rev record reviewed for this guide beside the catalogue row for the base type it belongs to, so the conflicts are visible rather than averaged away.

Two conclusions come out of that table and both are useful at the point of purchase. The first is that the 4.18 cc/rev displacement is a class, not a product. Four published records share it and they span 440 W to 540 W of cooling capacity and three different supply voltages, so buying on displacement alone will not get the right compressor. The second is that the store's published capacity for the 220-240 V 50 Hz build, at 440 W, is the one figure that survives cross-checking, because it matches the catalogue row almost exactly. The 60 Hz records cannot be checked at all against the catalogue because the catalogue prints no matching base type, and one of them contradicts itself between its own bullet block and its own specification table.

The same caution applies when moving within the family rather than between suffixes. The catalogue's ten-row 220-240 V 50 Hz R134a group runs from 280 W at 2.72 cc/rev up to 878 W at 8.04 cc/rev, and the capacity does not track displacement neatly, because a larger displacement can be paired with a different motor and still land lower than a smaller one on efficiency. If the target application needs roughly 440 W, this base type is the class match, but the efficiency penalty against its larger siblings in the same group should be weighed deliberately rather than overlooked. Buyers who want the wider selection context, including how to compare a rotary against a reciprocating compressor on noise and start torque, can read the store's technical guide to choosing a small refrigeration compressor, which sets out a five-step selection checklist for compact equipment.

Which standards govern a dehumidifier built around this compressor?

Naming a standard identifies which requirements apply. It is not a claim that this compressor, or any appliance built around it, has been tested or certified against that standard, and nothing in this guide should be read as such a claim. Three standards matter for the applications listed above, and they operate at two different levels.

At the appliance level, the governing standard for a dehumidifier is BS EN 810:1997, whose full title is Dehumidifiers with electrically driven compressors: rating tests, marking, operational requirements and technical data sheet. It is the standard that defines the two numbers a dehumidifier is sold on. Dehumidification capacity is defined in section 3.5 and the dehumidification efficiency ratio, the litres of water removed per kilowatt hour, is defined in section 3.6. The UK Energy Technology List entry for heat pump dehumidifiers, which is published against that standard, records that the dehumidification efficiency ratio is determined with a 27 degC dry bulb and 21 degC wet bulb air inlet, corrected for fan and pump power, and that capacity is determined at the rating conditions in Tables 2, 3 and 4 of the standard. This is why a compressor's ASHRAE/T capacity cannot be carried straight into a dehumidifier datasheet: the compressor is measured on a refrigerant cycle, the appliance on an air stream, and the standard specifies the air side.

Also at the appliance level, IEC 60335-2-40:2022 is the safety standard that covers this class of product. Its own title names household and similar electrical appliances, safety, part 2-40, particular requirements for electrical heat pumps, air conditioners and dehumidifiers, and it applies to appliances with or without motor-compressors at rated voltages up to 300 V for single phase and 600 V for multi-phase. Crucially for refrigerant choice, its scope covers refrigerants in groups A1, A2L, A2 and A3 as defined by ISO 817, so it is the standard that would govern an appliance if the refrigerant were changed from R134a to a lower-GWP alternative later in the product's life. The IECEE record for IEC 60335-2-40:2022 gives an issue date of 25 May 2022.

At the air conditioning level, if this base type is used in the cabinet AC application that the second domain lists, the performance standard is ISO 5151:2017, testing and rating for performance of non-ducted air conditioners and heat pumps. That standard's Table 1 defines three rating conditions, T1, T2 and T3, by indoor and outdoor dry bulb and wet bulb temperatures, and ISO 5151:2017 is the reference a cabinet AC rating is normally quoted against. The catalogue's ASHRAE/T condition used for the 440 W figure is not one of those three, so a cabinet AC rating and this compressor's catalogue rating sit on different scales and should not be mixed in one table.

Frequently asked questions

What refrigerant does the Highly BSA418CV-R1AUN use?

R134a, also written R-134a, whose ASHRAE designation is 134a and whose chemical name is 1,1,1,2-tetrafluoroethane with the formula CH2FCF3. The manufacturer's catalogue files the base type inside a constant-speed R134a group, and every published store page for the 4.18 cc/rev suffixes of this base type prints R134a in its refrigerant row.

What is the cooling capacity of the Highly BSA418CV-R1AUN?

The catalogue row for base type BSA418CV reads 440 W, which is 1,501 Btu/h, at an ASHRAE/T rating condition with a 7.2 degC evaporating temperature and a 35.0 degC ambient. No capacity is published for the exact string BSA418CV-R1AUN itself, because that string has no product page on this site. The store page for the 220-240 V 50 Hz sibling prints 440 W and 1,500 Btu/h for the same base type, which agrees within rounding.

Is the Highly BSA418CV-R1AUN a mini rotary compressor?

It is a hermetic single rotary compressor with a 4.18 cc/rev displacement and a 143.0 mm overall height, which places it at the small end of the manufacturer's R134a constant-speed family and matches what the trade normally means by mini. The word mini is not itself printed on the product pages or in the catalogue section title for this family, so treat it as an informal class description and specify the model string when ordering.

What is the difference between BSA418CV-R1AUN, BSA418CV-R1AUA and BSA418CV-R1AN?

All three share the same base type, BSA418CV, and therefore the same 4.18 cc/rev displacement and the same R134a refrigerant. They differ in the trailing configuration suffix and in the supply they are published against. The -R1AUA page prints 220-240 V 50 Hz single phase and 440 W. The -R1AN page prints 208-230 V 60 Hz single phase and a capacity that its own specification table gives as 445 W while its own bullet block gives as 465 W. The -R1AUN suffix has no page on this site. Because the suffixes are not defined in the manufacturer's published identification key, the meaning of each is a supplier question rather than a published fact.

Is the Highly BSA418CV-R1AUN suitable for a dehumidifier?

This is the strongest published fit for the base type. The manufacturer's catalogue places BSA418CV inside a section headed Dehumidifier Compressor, and the store's second domain lists Dehumidifier and Cabinet AC as the applications for this family, although the main domain's product pages print the more generic line AC, drier, refrigeration, chiller, etc. The ASHRAE/T rating condition at a 7.2 degC evaporating temperature is also the regime a dehumidifier operates in, so the rated capacity is directly relevant. A finished dehumidifier is nonetheless rated to BS EN 810:1997 on the air side, which is a different measurement from the compressor's bench rating.

Is R134a being phased out?

In the European Union, yes, in specific equipment classes rather than by a blanket ban on the refrigerant. The European Commission's refrigeration page lists prohibition dates by equipment class, with stand-alone equipment and condensing units gated at a GWP of 150 or more from 1 January 2022 for HFCs and from 1 January 2025 for other F-gases, and R134a carries a GWP100 of 1,430 in the table keyed to Regulation (EU) 2024/573. The same Commission page names R-471A, R-515B, R-513A, R-600a, R-290 and R-744 as substances positioned as replacements for R-134a. Markets without an equivalent F-gas gate continue to use R134a widely. The wider context for why refrigerant choice carries commercial weight in cooling equipment is set out in the IEA's The Future of Cooling, which is a market study rather than a regulation and is cited here for background only.

Sources

1. Highly rotary compressor catalogue, the manufacturer's document from which the base type BSA418CV row, the dehumidifier section heading, the power supply key and the four test condition definitions in this guide are read. The copy reviewed is hosted by a distributor rather than by the manufacturer's own site, which is disclosed here so the reader can weigh it. The document's own metadata declares that text extraction is not permitted; the values quoted were nevertheless read from its text layer and are reproducible from the file.
2. The Highly rotary compressor range page that holds this family, presented as a paginated catalogue.
3. The parent rotary compressor category page, the navigation context for every model page cited below.
4. BSA418CV-R1AUA product page. The 220-240 V 50 Hz record for this base type, and the source of the 440 W, 1,500 Btu/h and 3 W/W figures attributed to the store pages throughout this guide.
5. BSA418CV-R1AN product page. The 208-230 V 60 Hz record for this base type, and the page whose specification table and bullet block disagree on capacity.
6. BSA418CN-R1AN product page. A second 208-230 V 60 Hz record at 4.18 cc/rev, used in the comparison table.
7. BSA418CW-R1AN product page. The 115-120 V 60 Hz record at 4.18 cc/rev, used in the comparison table and the source of the 540 W figure that disagrees with the catalogue's nearest rows.
8. Second domain record for the same family. The source of the Cabinet AC and Dehumidifier application line, and of the manufacturer background paragraph reused across that site.
9. Technical guide to choosing a high-efficiency low-noise compressor for mini refrigerators. The store's own selection guide for compact R134a equipment, cited for the five-step selection checklist that applies to this displacement class.
10. Download centre. Confirmed to carry three compressor documents, none of them a Highly manual, which is why this guide cites a distributor-hosted catalogue for the manufacturer's data.
11. Contact page. Company details for Qishanr Technologies, including the address, telephone and sales email used in this article's structured data.
12. Shanghai Highly (Group) Co., Ltd. official site, compressor division. The manufacturer's own description of its compressor business, including the claims about global ranking, manufacturing bases and annual production capacity that appear in this guide as manufacturer statements rather than as independently verified facts.
13. ASHRAE Standard 34 refrigerant designations. The source of the R134a designation, chemical name and formula in this guide.
14. German Environment Agency, global warming potentials keyed to Regulation (EU) 2024/573. The source of the 1,430 and 1,300 GWP100 values for HFC-134a, and of the 675 for HFC-32 and 3,500 for HFC-125 used as internal cross checks.
15. European Commission, climate-friendly alternatives to F-gases, refrigeration, page last updated 9 April 2025. The source of the prohibition dates by equipment class, of the substances listed as replacements for R-134a, and of the statement that R-600a has proven more energy efficient than R-134a in domestic refrigeration.
16. Regulation (EU) 2024/573 on fluorinated greenhouse gases. The regulation from whose annexes the Commission's GWP values and mixture calculation method are taken.
17. UK Energy Technology List, heat pump dehumidifiers. The published statement of the BS EN 810:1997 requirements that govern a dehumidifier, including the definitions of dehumidification capacity and dehumidification efficiency ratio and the 27 degC dry bulb, 21 degC wet bulb rating condition.
18. IEC 60335-2-40:2022, electrical heat pumps, air conditioners and dehumidifiers. The product level safety standard whose scope covers ISO 817 groups A1, A2L, A2 and A3. Naming it identifies the governing standard and asserts no certification.
19. ISO 5151:2017, non-ducted air conditioners and heat pumps, testing and rating for performance. The source of the T1, T2 and T3 rating conditions referenced for the cabinet AC application.
20. IEA, The Future of Cooling. Market background for why refrigerant choice carries commercial weight in cooling equipment. No figure in this guide is taken from it.

What this guide does not verify

1. The exact string BSA418CV-R1AUN has no product page on this site. The path /products/highly-rotary-compressor-bsa418cv-r1aun.html returns HTTP 404, and no URL containing r1aun appears in the site sitemap, which does carry the -R1AUA and -R1AN pages for the same base type. Every rated value in this guide is therefore inherited from the base type or from a sibling suffix, and each is labelled as such where it appears. Confirm the string with the supplier before ordering.
2. The published efficiency is disputed and is not resolved here. The catalogue prints COP 2.10 W/W for base type BSA418CV while the store pages print a flat 3 W/W across the family. A flat value repeated across every suffix cannot be a measured family-wide result, and the two values imply input powers of about 210 W and about 147 W for the same 440 W of cooling. Do not quote an efficiency for this model without a datasheet.
3. R134a's ASHRAE safety group is deliberately left blank. No source used for this guide prints it. Do not fill it from memory, from a distributor page, from a blog, or by carrying over the A2L of R-32 or the A3 of R-290.
4. The configuration suffix R1AUN is not decoded. The manufacturer's identification key covers the power supply letters and the compressor family but not this suffix, and the key's compressor base type and starting method tables are published as image graphics with no text layer, so those two tables could not be read at all from the document reviewed. Route the meaning of R1AUN to the supplier rather than inferring it.
5. No input power, weight, sound power, sound pressure or low temperature capacity is published for this base type in any source used here, and none is stated in this guide. The catalogue prints no refrigeration or freezing row for BSA418CV, so no low-temperature capacity exists to quote, and the absence of a sound figure is a real gap for a dehumidifier specification.
6. One store page contradicts itself. The BSA418CV-R1AN and BSA418CN-R1AN pages print 465 W and 1,585 Btu/h in their bullet blocks and 445 W and 1,517 Btu/h in their specification tables, on the same page. Both versions are reported in the comparison table above rather than reconciled, and neither can be checked against the catalogue because it prints no matching 60 Hz base type.
7. Published site defects are disclosed, not corrected. The shared range copy describes these rotary compressors as highly reliable scroll compressors, the same Key Features block is reused across other compressor brands on this site, a flat COP of 3 W/W is published across the whole family against the catalogue's model-specific values, and the path /contact-us.html returns HTTP 404 while the live contact page sits at /en/contact-us.html. This guide reports the conflicts rather than silently choosing, except where the manufacturer's catalogue resolves them.
8. Mini is not a published product attribute. The word does not appear on the product pages or in the catalogue section title for this family. It is used in this guide only as an informal description of the displacement class, and the specification to order against is the model string plus the 4.18 cc/rev displacement.
9. No certification, efficiency class or regulatory approval is claimed for this model. Naming BS EN 810:1997, IEC 60335-2-40:2022 or ISO 5151:2017 identifies the standards that would govern an appliance built around this compressor. It does not assert that this compressor, or any appliance using it, has been tested, listed or certified against them, and it does not assert that any market's refrigerant rules are satisfied.