Mitsubishi KB122YPEC Rotary Compressor: R134a Technical Data, Family Structure and Selection Guide

The Mitsubishi KB122YPEC is a fixed-speed, hermetic rotary compressor for R134a, made by Mitsubishi Electric (Guangzhou) Compressor Co., Ltd. Its three-digit field denotes 12.2 cm3/rev displacement. The manufacturer rates that displacement class at 1,405 W cooling and 500 W input for a coefficient of performance of 2.81 at 54.4 C condensing and 7.2 C evaporating.

Key facts about the Mitsubishi KB122YPEC

The table below separates what the manufacturer publishes from what distributors publish, and it marks which figures could be reproduced arithmetically from the listing itself. The Basis column is the point of the table: a figure that only ever appears on a reseller page is a weaker fact than a figure that appears in the manufacturer catalogue, and the two are never averaged or merged.

What does the KB122YPEC model code decode to?

Mitsubishi Electric publishes a rotary model code legend in its refrigerant compressor catalogue, and the legend resolves the two segments of this part number that matter commercially: the refrigerant letter and the power supply letter. The legend lists eight power supply codes on the rotary side. V is 220 to 240 V at 50 Hz single phase. G is 220 to 240 V at 50 Hz or 230 V at 60 Hz single phase. Y is 380 to 415 V at 50 Hz or 460 V at 60 Hz three phase. R is 100 V single phase. W is 115 to 120 V at 60 Hz. S is 200 V. N is 208 to 230 V at 60 Hz. F marks an inverter stroke volume. A separate legend carries the refrigerant letter, where B is R134a, E is R407C and N is R410A.

The displacement field decodes cleanly, and it can be tested rather than assumed. Four rows in the manufacturer catalogue carry both a three-digit field and a printed displacement, and in all four the field divided by ten equals the printed displacement. The same rule holds on three further distributor pages at other displacement classes, which is why the 12.2 cm3/rev figure for KB122YPEC can be treated as settled even though the distributor table for it carries no independent provenance of its own.

One discrepancy inside the field deserves to be named rather than smoothed over. The manufacturer catalogue lists a 9.2 cm3/rev model as KB092GDMC. The distributor site lists two pages, Mitsubishi Compressor KB091VPD and Mitsubishi Compressor KB091VND, whose code field reads 091 and whose printed displacement is 9.1 cm3/rev. Both readings are internally consistent, and the 0.1 cm3/rev difference sits on the edge of what a catalogue would round, so this guide does not assert that either code is an error. What it does assert is that a buyer should quote the full part number including every suffix position, because the site's own KB122 family demonstrates that one displacement class can carry eight distinct codes with different suffix letters.

What does Mitsubishi Electric publish for the 12.2 cm3/rev KB class?

The manufacturer's R134a rotary table is the authoritative published source for this displacement class, and it is far more complete than any distributor page retrieved. It gives cooling capacity, power consumption, current, coefficient of performance, weight and oil charge together with the test conditions they were measured at. Mitsubishi Electric states that these figures were measured at 54.4 C condensing temperature, 7.2 C evaporating temperature, rated voltage plus or minus 10 percent, 27.8 K superheat and 8.3 K subcooling, that the single-phase data is taken at 230 V and 50 Hz, and that the three-phase data is taken at 380 V and 50 Hz. The catalogue adds a standing note that R134a rotary compressors are available in other versions and for other power supplies on request.

The KB families above are fixed speed. The catalogue places them in a rotary line-up whose R134a fixed-speed members run from 6.5 to 13.4 cm3/rev for the KB series, 15.4 to 24.7 cm3/rev for the RB series, and 33.0 cm3/rev for the TB series, the last of which is a twin rotary rather than a single rotary design. Above the fixed-speed families sit the inverter R134a families, CBB, SBB and TBB, which the catalogue groups with R410A inverter families and describes as BLDC inverter designs. Every R134a rotary family in the catalogue is listed as capable of a maximum condensing temperature of 81 C, which is the property that makes the family useful in heat pump water heating rather than in comfort cooling alone.

How do the distributor figures compare with the manufacturer figures?

This is the question a sourcing engineer actually needs answered, because the distributor table for the KB122 family disagrees with the manufacturer table at the same displacement, and the disagreement is large enough to change a system design. At 12.2 cm3/rev the manufacturer publishes 1,405 W of cooling capacity at 500 W of input for a coefficient of performance of 2.81. The distributor publishes 1,685 W of cooling capacity at 560 W of input for a coefficient of performance of 3.01. The capacity gap is 280 W, or 19.9 percent, and the efficiency gap is 0.20, or 7.1 percent.

The comparison is deliberately left unresolved, and the reason is the last row of that table. A compressor's cooling capacity is not a constant. It rises as evaporating temperature rises and falls as condensing temperature rises, and a single number without its rating point cannot be placed against another single number from a different rating point. The manufacturer's 1,405 W is a figure at 54.4 C condensing and 7.2 C evaporating. The distributor's 1,685 W is a figure at an unstated condition. The 280 W difference could be a genuine difference in rating point, it could be a different catalogue edition, or it could be an error, and no amount of arithmetic inside the two tables can decide between those three possibilities.

The same comparison at 13.4 cm3/rev shows the opposite outcome, and that is worth more than the disagreement. The distributor's Mitsubishi Compressor KB134VPD page prints 13.4 cm3/rev, 1,535 W cooling capacity, 520 W input and a coefficient of performance of 2.95. The manufacturer's KB134VFNC row prints 13.4 cm3/rev, 1,535 W cooling capacity, 520 W input and a coefficient of performance of 2.95. Four independent quantities agree exactly. That agreement tells a buyer something practical: the distributor's tables are not invented, they carry real manufacturer data at some displacement classes, and the KB122 row is therefore best treated as an unexplained point inside an otherwise traceable table rather than as evidence that the whole table is unreliable.

Why does one identical table cover eight KB122 part numbers?

Eight distributor pages for this displacement class were retrieved and compared field by field. Seven of them are siblings of the target part number, and all eight print a byte-identical specification block once the model name at the front is removed. The block reads 12.2 cm3/rev, 560 W input, 1,685 W or 5,749 BTU/h capacity, R134A, 220 to 240 V at 50 Hz single phase, coefficient of performance 3.01, dimension 232.9A/mm, and an application list of air conditioning, drier, refrigeration and chiller. Thirteen separate fields repeat across pages that carry eight different part numbers, which means the table cannot be discriminating between them.

The block is not constant across the whole catalogue, only across this displacement class. At 9.1 cm3/rev the pages print 370 W input, 1,100 W capacity and a coefficient of performance of 2.97 with a 234.1 dimension. At 13.4 cm3/rev they print 520 W input, 1,535 W capacity and a coefficient of performance of 2.95 with a 232.9 dimension. So the distributor's table varies with the displacement field and holds constant across the suffix positions, which is consistent with a template filled from a per-displacement data row and then reused for every suffix variant of that row. Two of the eight codes, KB122VFNC-MS and KB122VFPC-MS, even carry a suffix whose manufacturer counterpart appears in the catalogue as an inverter-family code position, yet the pages still print fixed-speed single-phase data.

The consequence for a buyer is narrow and practical. A specification block that repeats across eight part numbers cannot be used to choose between those eight part numbers. What distinguishes them is not in the table. The distributor pages for KB122VPDC-MS, Mitsubishi Compressor KB122GGRC and Mitsubishi Compressor KB122GGUC differ in their titles and their part numbers and in nothing else that a data field records. If a project needs the difference between a VPDC and a GGUC, only the supplier can supply it, and the request has to name the exact suffix positions.

Which electrical configuration applies, single phase or three phase?

Distributor and trade listings disagree about the supply for this part number, and the disagreement is not a mistake on either side. One listing gives 220 to 240 V at 50 Hz single phase. Another gives 380 to 415 V or 400 to 460 V at 50 or 60 Hz three phase. A third trade catalogue lists 230 V, 380 V and 460 V together for the same family. The manufacturer catalogue resolves the conflict, because its line-up table shows that the KB series is offered in two power supply variants, not one. The G variants are 220 to 240 V at 50 Hz or 230 V at 60 Hz single phase. The Y variants are 380 to 415 V at 50 Hz or 460 V at 60 Hz three phase.

So both readings describe the same displacement class, and the question a buyer has to answer is which one the supplier will ship. The suffix letters are the only place that distinction can live, and the manufacturer's published legend does not cover the positions that would carry it in this code. That makes the supply a question to be answered in writing before an order is placed, not a question to be answered from a web page. It also explains a pattern that otherwise looks like data corruption: the distributor's KB122 block prints a single-phase supply for every one of the eight suffix codes, which is exactly what a template filled from one power supply variant and reused across the family would produce.

Which refrigerant family does the KB series belong to?

Three independent sources put the KB series in the R134a family, and one class of page on the distributor's own site contradicts them. The manufacturer catalogue lists the KB series under R134a with the refrigerant code letter B, lists its R407C families under code E and its R410A families under code N, and prints R134a as the refrigerant for every KB, RB and TB row in its rotary table. The manufacturer's Chinese product site names the R134a rotary families as KB and LB on one power supply row and KB, RB and TB on another. A trade catalogue that groups Mitsubishi R134a fixed-speed rotary compressors lists a KB122 code, KB122YFPC, inside the R134a group alongside RB, TB and LB models.

The contradiction sits in one page template rather than in one page. Every page whose URL begins with the word rotary and then compressor, including Mitsubishi Rotary Compressor KB104VND, Mitsubishi Rotary Compressor RB174YNL, Mitsubishi Rotary Compressor RB174YNK, Mitsubishi Rotary Compressor TB36Y and Mitsubishi Rotary Compressor LH45VBDC, describes its model as designed for R410A and carries no specification table at all. The pages whose URL begins with the word compressor and then the model name, such as the Mitsubishi Compressor KB122YPEC-MS page or Mitsubishi Compressor KB122VPD, carry a specification table and print R134A. Nine of the prose pages were retrieved and eight of them named R410A. None of them is a specification source, and none of them should be used to decide a refrigerant question.

For this part number the refrigerant question is settled in the direction the manufacturer states, because the manufacturer is the origin of the model code, because its catalogue prints R134a against every KB row, and because the refrigerant letter in the model code legend maps B to R134a. R134a it is. That conclusion matters for a system designer beyond the choice of gas, because R134a is a high-pressure-side refrigerant in the sense that the KB family is documented to operate at condensing temperatures up to 81 C, which is well above what an R410A comfort-cooling rotary is rated for. That property, not the marketing wording on a distributor page, is what makes the family suitable for heat pump water heating and for dehumidification.

What are the operating limits of the KB series?

The manufacturer publishes a separate standards and limits page for its rotary families, and for the KB series those limits are the operational envelope a system designer has to respect. They are not marketing ranges and they are not optional: they define where the compressor may be run and where the warranty and the published performance figures stop applying. The envelope is wide by the standards of a small fixed-speed rotary, which is consistent with the family's stated role in heat pump and dehumidifier duty, and it is bounded at both ends by pressures, temperatures and a compression ratio that the machine is not built to exceed.

Two of those limits carry more engineering weight than the rest. The first is the discharge gas temperature reduction from 115 C to 110 C in heat pump and dehumidifier duty, which is exactly the duty the manufacturer's Chinese product site names for the family and which a heat pump water heater will actually impose. The second is the 81 C condensing ceiling. A designer choosing this compressor for water heating is working close to that ceiling by design, and a designer choosing it for comfort cooling is nowhere near it, which is why the family's published application set and its published limits agree with each other and disagree with the generic air conditioning wording on the distributor pages.

Do the printed numbers reproduce arithmetically?

Every numeric claim on the distributor pages for this displacement class was re-derived from the page's own other numbers. The audit is worth doing because it separates a table that was computed from a table that was copied, and it found that the arithmetic is sound even where the provenance is not. Two relationships were tested across twelve rows. The first is the coefficient of performance, which should equal cooling capacity divided by power consumption. The second is the imperial capacity, which should equal the metric capacity multiplied by the standard conversion factor of 3.412 BTU per watt-hour. Both relationships hold, and both hold in a way that shows the two pages drew on the same underlying data.

The conversion audit is the more interesting of the two, because this production line has previously been shown to convert watts to BTU per hour at 3.4 rather than at 3.412, which understates an imperial figure by about 0.35 percent. That defect is not present here. The implied factor on the KB122 rows is 3.4118, and on the KB091 rows it is 3.4118. Both sit within 0.01 percent of the standard factor. The KB134 rows imply 3.4098, which is 0.07 percent away, and the small gap there resolves as rounding of the metric figure: 1,533.93 W would produce the printed 5,234 BTU/h exactly at the standard factor, so the underlying value is more likely 1,534 W rounded up to 1,535 W than a second conversion defect.

What the audit establishes is bounded and worth stating precisely. It establishes that the distributor's KB122 table is internally coherent: whoever built it divided capacity by power correctly and converted to imperial units correctly. It does not establish that the capacity number itself is right, and it cannot, because internal coherence is a property a wrong number can have just as easily as a right one. A table can be arithmetically perfect and still be describing a different rating point than the one a project needs. The audit therefore removes one possible explanation for the 280 W gap against the manufacturer, the explanation that the distributor simply miscalculated, and leaves the gap standing.

How does the KB122 sit in the KB and R134a line-ups?

Position in a displacement ladder is the cheapest selection tool available and the most reliable, because it needs no performance data at all. The catalogue's KB rows form a four-step ladder from 6.5 to 13.4 cm3/rev, and the distributor's site carries a fifth code, KB104, whose field implies 10.4 cm3/rev. The 12.2 step is not the largest in the family and it is not the smallest; it sits above the two nine-centilitre steps and above the ten-centilitre step and below the 13.4 step. The catalogue's line-up table puts the whole KB series between 0.9 and 1.5 kW, which brackets the 1.405 kW figure published for the 12.2 cm3/rev row.

Beyond the KB series the same manufacturer catalogue publishes two larger R134a fixed-speed rotary families and one inverter group, and the distributor's site carries pages for each. The RB series runs from 15.4 to 24.7 cm3/rev in single rotary form with 1,850 W to 2,880 W of cooling capacity in the catalogue rows, and it is also offered in a 380 to 415 V three-phase variant. The TB series is a twin rotary at 33.0 cm3/rev with 3,965 W or 4,000 W depending on the power supply. Above them the CBB, SBB and TBB inverter families cover the same refrigerant with BLDC drive. The distributor carries 71 Mitsubishi rotary pages and 14 KB pages, and the pages that carry real specification tables are the fourteen KB pages; the RB, TB and LH pages, such as Mitsubishi Rotary Compressor RB173YFY and Mitsubishi Rotary Compressor KH091VFHC-L, carry prose only.

The ladder is useful for the negative inference as much as the positive one. A project that needs more than 1.4 kW of R134a cooling capacity at the catalogue's test conditions does not need a KB122 with a different suffix; it needs to step up to the next displacement, and the catalogue makes that step explicit with published data at every rung. A project that needs less should step down. Reading down the ladder and then confirming the chosen rung's rating point is a faster and safer route than choosing between eight part numbers whose pages print one identical table.

What does R134a mean for selection and compliance?

R134a is a hydrofluorocarbon with a hundred-year global warming potential of 1,526 according to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change, and that single number drives most of the regulatory pressure a KB122YPEC buyer should be aware of. For context, the same assessment report gives R32 a hundred-year value of 771, so R134a carries roughly twice the climate impact per kilogram released. The European Union's 2024 fluorinated greenhouse gas regulation sets the direction of travel: the European Commission states that under that regulation hydrofluorocarbons sold on the EU market are to be phased out by 2050. The Commission also reports that hydrofluorocarbons were still the largest single fluorinated gas use by carbon dioxide equivalent in 2023 and that their use fell by 10 percent in 2024 compared with 2023.

None of that makes a KB122YPEC unavailable, and it would be wrong to present it as if it did. The regulation governs placing hydrofluorocarbons on the EU market and the equipment that contains them, not the continued operation of an installed compressor, and the phase-down is a schedule that runs to 2050 rather than a switch. What it does mean is that a buyer specifying this compressor for equipment destined for the European Union should establish the equipment-level obligations that apply to their product rather than assuming that a compressor level specification settles the question. It also means the total lifetime cost of ownership calculation should include refrigerant handling, recovery and any future charging restrictions, because a refrigerant with a hundred-year value of 1,526 is the kind of gas whose servicing economics change over a machine's life.

The wider context is that cooling demand is rising and the industry is under pressure on exactly this axis. The International Energy Agency's work on cooling describes space cooling as one of the fastest-growing end uses of energy in buildings worldwide, and industry bodies such as the European ventilation and air conditioning association have written publicly about the difficulty of comparing seasonal efficiency figures across standards. A compressor specification is a small part of that picture, but the rating condition question raised earlier in this guide is the same question those industry discussions turn on: a performance number without a defined test point is not a comparable performance number, and the standards bodies exist precisely to remove that ambiguity.

Which standards govern the performance claim?

Four separate standards questions sit behind a compressor part number, and they are frequently confused with one another. The first is what the refrigerant is, which is a designation question. The second is how the performance figure was measured, which is a rating question. The third is whether the machine is safe, which is a product safety question. The fourth is how the equipment that contains it is tested, which is a system question. A distributor page can settle none of them, and a manufacturer catalogue settles only the second and part of the first. The distinction matters because a capacity figure quoted without its rating standard is not a specification at all.

The rating question is the one that decides whether the number in this article can be used. The manufacturer's 1,405 W is traceable to a stated method: 54.4 C condensing, 7.2 C evaporating, 27.8 K superheat, 8.3 K subcooling, rated voltage plus or minus 10 percent, measured at 230 V and 50 Hz for the single-phase variant. The distributor's 1,685 W is traceable to nothing. Under either the American or the European rating standard, a manufacturer publishing a capacity figure is expected to publish the conditions and tolerances alongside it, which is why the manufacturer catalogue carries a conditions footnote and why its absence on the distributor page is a substantive defect rather than a formatting omission. When a supplier quotes a compressor capacity, the correct follow-up question is not what the capacity is but what condition it was measured at, and a supplier who cannot answer has not quoted a specification.

Which applications does the KB122YPEC suit?

The manufacturer and the distributor publish different application sets for this family, and the manufacturer's is narrower and more specific. The manufacturer's Chinese product site names heat pump water heaters, dehumidifiers and similar heating and cooling equipment for the R134a rotary families, and the catalogue's limits page reinforces that by reducing the maximum discharge gas temperature specifically for heat pump and dehumidifier duty. The distributor lists air conditioning, drier, refrigeration and chiller. Where the two overlap, the family is genuinely suitable. Where they do not, the manufacturer's narrower statement and the 81 C condensing ceiling are the better guide.

Two exclusions deserve emphasis because they are the two ways this compressor gets misapplied. The first is low-temperature refrigeration. A frozen food application will run an evaporating temperature far below minus 10 C, which is outside the published KB envelope, and no amount of reading a distributor page will make it inside. The second is inverter duty. The KB family is fixed speed, and the suffixes that a buyer might read as inverter designations on distributor pages still carry fixed-speed single-phase data on those same pages. A project that needs capacity modulation needs an inverter family, not a differently suffixed KB122.

How do you specify a KB122YPEC compressor for a project?

1. Decide the refrigerant first. If the system is not an R134a system, this compressor is the wrong family and the rest of the checklist does not apply.
2. Confirm the refrigerant in writing with the supplier. The distributor's own site contains pages that assign R410A to models the manufacturer documents as R134a, so a verbal confirmation is worth less than a written one.
3. Fix the rating point. State the condensing temperature, evaporating temperature, superheat and subcooling that the design will see, because the only capacity figure this guide can vouch for is the one published at 54.4 C and 7.2 C.
4. Ask for the capacity at that rating point rather than accepting a catalogue figure. The gap between 1,405 W and 1,685 W at the same displacement shows what an unspecified rating point can hide.
5. Establish the power supply variant in writing. The KB series is offered in a G variant at 220 to 240 V single phase and a Y variant at 380 to 415 V three phase, and the distributor block prints the single-phase reading for every suffix.
6. Quote the complete part number including every suffix position. Eight codes share one specification block on the distributor's site, so a shortened part number is not a specification.
7. Check the design envelope against the published limits. Condensing 28 C to 81 C, evaporating minus 10 C to 31 C, compression ratio below 8, and the 110 C discharge limit if the duty is a heat pump or a dehumidifier.
8. Check the installation limits. Maximum inclination below 5 degrees, maximum piping vibration 0.8 mm, maximum pipe stress 3.44 kg per mm2 at start and stop, and a restart interval of more than three minutes after pressure equalisation.
9. Size the electrical protection and the starting duty against the published starting requirement, which is 85 percent of rated voltage at 1.67 MPa balancing pressure for this family, and against the catalogue current of 2.30 A at the reference condition.
10. Resolve refrigerant compliance obligations for the destination market before the design freezes, because the phase-down schedule for hydrofluorocarbons in the European Union runs to 2050 and a design with a multi-year production life may outlive the assumptions it was specified under.

Frequently asked questions about the Mitsubishi KB122YPEC

Is the KB122YPEC the same compressor as the KB122VFNC?

They are the same displacement class and not the same part number. Both decode to 12.2 cm3/rev, both are KB series R134a fixed-speed rotary compressors, and the manufacturer catalogue publishes performance data for the KB122VFNC row at 1,405 W cooling and 500 W input for a coefficient of performance of 2.81 at 54.4 C condensing and 7.2 C evaporating. No performance row for the KB122YPEC code itself was located in the manufacturer catalogue, and the distributor's data for that code carries no rating condition, so the KB122VFNC row is the closest published anchor rather than a statement about the KB122YPEC. The distributor's KB122VFNC-MS page prints the same 12.2 cm3/rev block as every other member of the family, so it does not resolve the difference either.

Why does the distributor page show 1,685 W when the manufacturer shows 1,405 W?

Because the distributor's figure has no stated rating condition and the manufacturer's does. Capacity changes with condensing and evaporating temperature, so a number without a rating point cannot be compared with a number that has one. The 280 W gap may be a different rating point, a different catalogue edition or an error, and this guide does not choose between those explanations. The manufacturer's number is published in its refrigerant compressor catalogue with the rating conditions printed beside it, and the distributor's is not. Ask the supplier for the capacity at your own design point, in writing.

Is this compressor single phase or three phase?

The KB series is offered in both, but a specific part number is one or the other. The G variant is 220 to 240 V at 50 Hz or 230 V at 60 Hz single phase. The Y variant is 380 to 415 V at 50 Hz or 460 V at 60 Hz three phase. Both readings appear in trade listings for this model, and the distributor's specification block prints the single-phase reading for all eight KB122 codes, so the supply has to be confirmed per order rather than inferred from a page.

Does the R410A wording on some distributor pages apply to this model?

No. The pages that describe their model as designed for R410A are a marketing template that also carries no specification table, and nine such pages were retrieved with eight naming R410A. The manufacturer catalogue lists the KB series under R134a with refrigerant code letter B, and the manufacturer's Chinese product site names the KB family in its R134a product line.

What is the global warming potential of the refrigerant this compressor uses?

R134a has a hundred-year global warming potential of 1,526 and a twenty-year value of 4,144 in the Sixth Assessment Report of the Intergovernmental Panel on Climate Change. For comparison, the same report gives R32 a hundred-year value of 771. The European Commission states that under the 2024 fluorinated greenhouse gas regulation hydrofluorocarbons sold on the EU market are to be phased out by 2050.

Can this compressor be used for frozen storage or low-temperature refrigeration?

It should not be. The KB series evaporating range published by the manufacturer is minus 10 C to 31 C, and frozen storage runs well below the bottom of that range. A project that needs a lower evaporating temperature needs a different family; among the manufacturer's R134a rotary families the RB and TB series extend the displacement range but the published evaporating envelope is the figure that governs the application. The Mitsubishi rotary compressor range lists the larger families for comparison.

What efficiency should be used in a system model?

Use the manufacturer figure with its condition attached, which is a coefficient of performance of 2.81 at 54.4 C condensing and 7.2 C evaporating. The distributor's 3.01 has no condition and should not be used in a model without one. If the design condensing temperature is materially lower than 54.4 C the real coefficient of performance will be better than 2.81, and if it is higher it will be worse, which is exactly why a system model needs a rating point rather than a single number.

What data could not be verified for this model?

The suffix letters EC on the requested code and the suffix MS on the distributor's code are not covered by any published model code legend that was located, so neither is decoded here. No sound power level, no crankcase heater specification, no weight and no oil charge is published on the distributor page, and the dimension field is printed as an unlabelled string rather than a labelled height or diameter. No certificate for this compressor was sighted, so no certification claim is made. The distributor's 1,685 W capacity figure remains unreconciled against the manufacturer's 1,405 W, and that remains the single largest open question about this part number.

Sources and further reading

The manufacturer material in this guide comes from the Mitsubishi Electric refrigerant compressor catalogue and from Mitsubishi Electric's Chinese and international compressor sites. The catalogue's original host address no longer resolves and the copy linked below is hosted by a refrigerant distributor, so it is cited as a manufacturer document on a third-party mirror rather than as an official download. The refrigerant and regulatory material comes from the Intergovernmental Panel on Climate Change and the European Commission. The trade listings are cited for what they claim, not for what they prove.