Home / Comparisons / 2-zone multi-zone, 18,000 BTU
GREE FREEMATCH R32 and FUJITSU AIRSTAGE AQUILA XLTH, two rooms on a single compressor
Two R-32 multi-zone systems for two rooms, both certified at 18,000 BTU/h in cooling and both listed in the ENERGY STAR directory for cold climates. With a multi-zone system, the AHRI certificate covers a set: one outdoor unit and one type of indoor unit. This page shows what each certificate covers, then puts the figures side by side.
FREEMATCH R32 · 2 zones, 18,000 BTU
GWHD(18)ND6MO + non-ducted indoor units · AHRI 214931586
See the product page
AQUILA XLTH · 2 zones, 18,000 BTU
AOUH18KWAH2 + non-ducted indoor units (typical: 2 × ASUH09KPAS) · AHRI 215447691
Also sold under the name GENERAL AIRSTAGE.
See the product pageWhat the electricity costs, in dollars, winter and summer
AirGreen estimate for the same 18,000 BTU/h zone in Montréal, at Hydro-Québec’s Rate D, taxes included. Both heat pumps are calculated in exactly the same way, with the same method as on all our comparison pages; only their certified efficiencies change. Electric baseboards serve as the reference point. Here, the zone is both rooms together: 18,000 BTU/h, the certified capacity of both systems at 35 °C.
How this amount is calculated
- Heat to deliver over the winter. A zone whose heat loss reaches 18,000 BTU/h ( kW) at −23.1 °C, Montréal’s design temperature: kW × 24 h × 4,167 degree-days ÷ (18 − (−23.1)) = kWh of heat for round-the-clock heating, all winter. Heating degree-days (base 18 °C) and design temperature: Natural Resources Canada, HOT2000 climate data, Montréal Intl station. With fewer hours per day (“Heating” slider), the heat is reduced in the same proportion, for the heat pump as for the baseboards: this simplification does not account for recovery after a temperature setback.
- Electricity for heating. Heat pump: heat × 3.412 ÷ HSPF2 Region V, the AHRI certificate value published by NEEP. Region V is the coldest in the standard, and its calculation includes the electric backup expected when the heat pump is no longer enough. Electric baseboards: 1 kWh of electricity for 1 kWh of heat.
- Electricity for cooling. 18,000 BTU/h ÷ SEER2 × hours per day × 60 days ÷ 1,000: the method of Hydro-Québec’s air-conditioning calculator, with the SEER2 seasonal efficiency from the AHRI certificate. The number of hours is a scenario you can set above, from 1 to 24 h. At 24 h, the calculation assumes rated capacity all day long: that is a ceiling, since a variable-speed unit slows down once the room is at temperature.
- Price. Hydro-Québec Rate D in effect April 1, 2026: 7.065¢ per kWh up to 40 kWh a day, 11.142¢ beyond; the average price, 9.104¢, is the one Hydro-Québec’s calculators use. GST and QST included. Network access charges, the same with or without a heat pump, are not counted.
AirGreen method v1.1, November 9, 2026. An estimate is used to compare units under the same conditions. The actual bill depends on the house, the insulation, the settings and the use; this amount is not a promise.
Your two rooms on each system’s scale
A multi-zone system shares a single compressor between the rooms. What matters, then, is the sum of the needs and the range the compressor can cover, from minimum to maximum. Set the need of each room: the marker moves along the certified ranges of both systems.
Sum of both rooms: 11,000 BTU/h
Ranges: AHRI certificates 214931586 and 215447691, published by NEEP (minimum, rated and maximum capacity at each test temperature, 21.1 °C indoors in heating and 26.7 °C in cooling). This illustration places published values on one scale. It is not a simulation: the real need of each room comes from a load calculation, and FUJITSU AIRSTAGE states that its combination tables are not meant for final sizing.
FREEMATCH R32Wall-mounted heads in the GREE table, in BTU/h
- 5,000
- 7,000
- 9,000
- 12,000
Published combinations for the GWHD(18)ND6MO: 5 + 5, 5 + 7, 7 + 7, 9 + 9, 9 + 12 and 12 + 12. The table gives the capacity per room: 9,000 + 9,000 BTU/h for 9 + 9, 7,714 + 10,286 for 9 + 12, and 9,000 + 9,000 for 12 + 12. GREE Canada submittal sheet.
AQUILA XLTHWall-mounted heads in the FUJITSU AIRSTAGE table, in BTU/h
- 7,000
- 9,000
- 12,000
- 15,000
Published combinations for the AOUH18KWAH2: 7 + 7, 7 + 9, 7 + 12, 7 + 15, 9 + 9, 9 + 12, 9 + 15 and 12 + 12, i.e. 14,000 to 24,000 BTU/h connected. The brochure states that a total above 100% does not increase the system’s capacity. Brochure FG2057B.
One outdoor unit, three certificates
Each outdoor unit is certified three times: with non-ducted indoor units (wall-mounted, cassettes, consoles), with ducted units, then in a mixed combination. Efficiencies change from one certificate to the next. This whole page compares the two “non-ducted” certificates, those of a system with two wall-mounted heads.
Non-ducted
Two wall-mounted heads, for example. This is the comparison on this page.
AHRI 214931586 · AHRI 215447691
Ducted
Two ducted units.
AHRI 214931591 · AHRI 215447692
Mixed
One non-ducted head and one ducted unit.
AHRI 214931592 · AHRI 215447698
Values from the six AHRI certificates published by NEEP, consulted November 9, 2026. Bars: SEER2 on a scale of 0 to 24, HSPF2 Region IV on a scale of 0 to 12. In cooling at 35 °C, the GREE “ducted” certificate shows 16,000 BTU/h; the other five, 18,000 BTU/h.
Below −15 °C: every published number, at its exact temperature
NEEP certifies both systems at −15 °C, at the same temperature. Lower, each has a single certified point, and not in the same place: −30 °C for the FREEMATCH R32, −26.1 °C for the AQUILA XLTH. Nothing is calculated between two points.
What each manufacturer writes
GREE FREEMATCH R32 brochure (X610068B), GREE Canada submittal sheet and service manual, FUJITSU AIRSTAGE brochure FG2057B. Each line quotes what the manufacturer writes. The GREE brochure describes the outdoor unit; several comfort features depend on the head chosen.
FREEMATCH R32: stated heating from −30 to 24 °C; outdoor unit base pan heater (72 W); “intelligent” defrost.
AQUILA XLTH: heating down to −26 °C, “no shutoff device”; base pan heater below 2 °C.
FREEMATCH R32: stated cooling range of −30 to 48 °C.
AQUILA XLTH: from −10 to 50 °C.
FREEMATCH R32: “7 indoor options”; the submittal sheet lists wall-mounted units (Charmo, Clivia, Pular, Sapphire), cassettes, a slim duct, a floor/ceiling unit and a mini console.
AQUILA XLTH: wall-mounted, Slim Duct, compact cassette, mid-static ducted and multi-position air handler.
FREEMATCH R32: indoor units powered from the outdoor unit; automatic voltage adaptation; low-voltage start-up.
AQUILA XLTH: 208 to 230 V, single phase; 20 A breaker.
FREEMATCH R32: A2L leak sensor included.
AQUILA XLTH: not stated in brochure FG2057B.
FREEMATCH R32: quiet operation and self-diagnosis on the outdoor unit side; comfort modes depend on the head.
AQUILA XLTH: Economy, Minimum Heat, Quiet, Sleep, weekly timer, automatic heating-cooling changeover.
FREEMATCH R32: depends on the head chosen; the FREEMATCH brochure does not specify it.
AQUILA XLTH: “Wi-Fi Capable”, inputs-outputs and third-party control.
FREEMATCH R32: automatic restart (GREE Canada website).
AQUILA XLTH: Restart function.
FREEMATCH R32: self-diagnosis; coil protected against corrosion by an acrylic resin (GREE Canada website).
AQUILA XLTH: Blue Fin fins.
The sound of each one, according to its manufacturer
FUJITSU AIRSTAGE publishes six named speeds for the ASUH09KPAS head. On the GREE side, the sound depends on the head: the figures are those of the 9,000 BTU/h CHARMO, one of the heads on the AirGreen product page, published in seven levels with no speed names.
How to read these figures. dB(A) measures a noise level as the ear perceives it: the lower the figure, the quieter the unit. Each dot is a fan speed published by the manufacturer, from the slowest to the fastest.
Why this is not a ranking. Each manufacturer measures under its own conditions, and GREE publishes neither the distance nor the measurement conditions. A gap of a few dB(A) can come from the method as much as from the unit.
Indoor unit, in the room
Cooling, all published speeds, 9,000 BTU/h head
Outdoor unit, outside
Published values for the 18,000 BTU/h outdoor unit
Measurements taken by each manufacturer using its own method: read them separately, not as a ranking.
Sources: GREE CHARMO R32 service manual (GWH09ATCXB-D6DNA1C, sound pressure) and GREE Multi R32 service manual (GWHD(18)ND6MO: sound pressure 54 dB(A), sound power 64 dB(A)); FUJITSU AIRSTAGE brochure FG2057B (ASUH09KPAS and AOUH18KWAH2). With the CLIVIA or the AIRY, the values for the GREE head differ.
Outside, on the wall, in the piping
Outdoor units, outlines to scale
ND6MO
KWAH2
32 3/8 × 21 11/16 in
depth 13 7/8 in · 78.3 lb
32 5/16 × 34 13/16 in
depth 12 3/8 in · 117 lb
Diagram: published width and height, at the same scale. Almost the same width; the AQUILA XLTH outdoor unit is 13 1/8 in taller.
Indoor units to scale
Widths to scale. GREE photo: the wall-mounted head from the AirGreen product page; dimensions of the 9,000 BTU/h CHARMO (GREE Canada service manual).
Two rooms far apart: the total piping length
Dark: length covered by the factory charge. Light: length allowed with added refrigerant. Hatched: below the published minimum total length. GREE brochure X610068B and GREE Canada submittal sheet; FUJITSU AIRSTAGE brochure FG2057B. Each line also has its own limit: 65.6 ft to the last indoor unit for the FREEMATCH R32 (equivalent length), 16 to 82 ft per unit for the AQUILA XLTH.
| Installation | FREEMATCH R32 | AQUILA XLTH |
|---|---|---|
| Maximum piping lengthTotal of both lines | 131 ft | 164 ftPublished minimum: 33 ft in total. |
| Piping length per indoor unit | 65.6 ftEquivalent length to the last indoor unit (submittal sheet and service manual). | 82 ft16 to 82 ft per unit. |
| Precharged length | 33 ftThen 0.2 oz per foot. | 98 ftAmount to add beyond that: not stated in the brochure. |
| Maximum height difference | 49 ftSame value between two indoor units. | 49 ft33 ft between two indoor units. |
| Liquid – gas diametersPer indoor unit | 1/4 – 3/8 in | 1/4 – 3/8 in |
| Outdoor unit W × H × D, weight | 32 3/8 × 21 11/16 × 13 7/8 in, 78.3 lbThe GREE Canada submittal sheet shows 75 lb. | 32 5/16 × 34 13/16 × 12 3/8 in, 117 lb |
| Indoor unit, weight9,000 BTU/h wall-mounted head | 19.8 lbCHARMO GWH09ATCXB-D6DNA1C. | 21 lbASUH09KPAS. |
| Electrical protectionPer the manufacturer | MOCP 20 A (MCA 14.5 A)Brochure X610068B. The GREE Canada submittal sheet shows an MCA of 18.5 A: to be confirmed at the quote. | 20 A breaker (minimum circuit ampacity 19.9 A) |
| Clearances around the outdoor unit | 6 in from the wall; 6 to 24 in from obstacles depending on the sideFigure in the GREE Canada submittal sheet. | Figure in the AOUH18KWAH2 installation manualBrochure FG2057B does not reproduce them. |
| Connectable capacityRated total of the two heads | 10,000 to 24,000 BTU/hFrom the combination table: from 5 + 5 to 12 + 12. | 14,000 to 24,000 BTU/h |
| Stated heating / cooling range | −30 to 24 °C / −30 to 48 °C | −26 to 24 °C / −10 to 50 °C |
What we are asked about these two systems
Why compare complete systems rather than heads?
Because a multi-zone AHRI certificate covers a set: one outdoor unit and one type of indoor unit. The SEER2, HSPF2 and capacities on this page are those of the set “18,000 BTU/h outdoor unit and non-ducted indoor units”. The capacity of each head comes from the manufacturer’s documents and is labelled as such.
Both are 18,000 BTU/h: why are the heating figures different?
The 18,000 BTU/h is the certified capacity in cooling, at 35 °C. In heating at 8.3 °C, the FREEMATCH R32 certificate shows a rated capacity of 18,000 BTU/h and the AQUILA XLTH certificate, 22,000 BTU/h. At −15 °C, the certified maximum capacities are 13,800 and 22,000 BTU/h. These values come from the AHRI certificates published by NEEP.
What happens below −26 °C or below −30 °C?
Each manufacturer states a heating range: down to −30 °C for the FREEMATCH R32, down to −26 °C for the AQUILA XLTH, with the “no shutoff device” wording in the FUJITSU AIRSTAGE brochure. Neither gives a capacity figure beyond its last certified point. The Extreme cold section places each figure at its exact temperature.
Can two 12,000 BTU/h heads be connected to an 18,000 unit?
Both manufacturers publish the 12 + 12 combination. The GREE table then shows 9,000 BTU/h per room. The FUJITSU AIRSTAGE brochure states that a connected total above 100% does not increase the system’s capacity. Heads are chosen room by room, from a load calculation.
Which GREE heads go with the FREEMATCH R32?
The AirGreen product page lists the CHARMO, CLIVIA and AIRY wall-mounted heads. The GREE Canada submittal sheet for the GWHD(18)ND6MO also lists other types of indoor units. The sound and dimension figures on this page are those of the 9,000 BTU/h CHARMO; they change with another head.
FUJITSU AIRSTAGE and GENERAL AIRSTAGE: is there a difference?
AirGreen also offers the AQUILA XLTH under the name GENERAL AIRSTAGE. This page uses the model numbers and the AHRI certificate of the FUJITSU AIRSTAGE version (AOUH18KWAH2, AHRI 215447691).
Which one is right for me?
This page does not rank the units. It shows the certified values and what each manufacturer publishes, with the sources. The right choice depends on your two rooms, the distance between them, the outdoor location and your current heating.
Are these systems eligible for financial assistance?
Eligibility is checked on the official list of Hydro-Québec’s LogisVert program at the time of the quote, for the exact combination installed. This page gives no amounts, and programs can change.
All AHRI and NEEP values
| Certified value | FREEMATCH R32 | AQUILA XLTH |
|---|---|---|
| Cooling | ||
| Rated capacity at 35 °C | 18,000 BTU/h | 18,000 BTU/h |
| 35 °C: min. / rated / max.BTU/h | 7,000 / 18,000 / 19,600 | 6,100 / 18,000 / 21,000 |
| SEER2 | 21.0 | 22.0 |
| EER2 | 12.0Brochure X610068B shows 12.5; the certificate prevails. | 13.5 |
| Heating, same conditions | ||
| HSPF2 Region IV / V | 10.0 / 8.0 | 11.0 / 9.3 |
| 8.3 °C: min. / rated / max.BTU/h | 7,000 / 18,000 / 18,100 | 6,800 / 22,000 / 25,000 |
| 8.3 °C: COP min. / rated / max. | 3.95 / 3.91 / 3.21 | 4.53 / 4.39 / 4.39 |
| −8.3 °C: min. / rated / max.BTU/h | 7,200 / 17,600 / 17,600 | 4,700 / 14,800 / 22,800 |
| −8.3 °C: COP min. / rated / max. | 3.25 / 2.36 / 2.36 | 3.28 / 3.24 / 2.58 |
| −15 °C: min. / rated / max.BTU/h | 7,200 / 13,800 / 13,800 | 3,900 / 22,000 / 22,000 |
| −15 °C: COP min. / rated / max. | 2.45 / 2.00 / 2.00 | 2.79 / 2.18 / 2.18 |
| Coldest point of each certificate (different temperatures) | ||
| Test temperature | −30 °C (−22 °F) | −26.1 °C (−15 °F) |
| Capacity min. / max.BTU/h | 7,000 / 10,200 | 2,500 / 12,060 |
| COP min. / max. | 1.55 / 1.51 | 1.83 / 2.02Values as published by NEEP: 12,060 BTU/h for 1.75 kW. |
| Certification | ||
| ENERGY STAR / cold climate (NEEP) | Yes / Yes | Yes / Yes |
| ENERGY STAR directory, markets listed | United States, Canada | United States, Canada |
| AHRI certificate · NEEP record | 214931586 · 392112 | 215447691 · 455168 |
| RefrigerantGWP per the IPCC (AR4); ASHRAE 34 class | R-32 · GWP 675 · A2L | R-32 · GWP 675 · A2L |
higher marks the higher value of the same measure, under the same conditions. It is not a recommendation. Capacities and COPs by point are not highlighted: the order changes depending on the point read.
Both are on the AirGreen website.
To choose for your two rooms, talk to our team: bring the room dimensions, the distance between them, the planned outdoor location and your current heating.
Where each figure comes from
Data verified November 9, 2026. Performance: AHRI certificates and the NEEP database. Dimensions, sound, piping and features: according to the manufacturer. When a source contradicts the AHRI certificate, the certificate prevails.
Trademarks. GREE, FREEMATCH, FUJITSU AIRSTAGE, GENERAL AIRSTAGE and AQUILA XLTH are trademarks of their respective owners. Logos are used only to identify the products compared. AirGreen is a dealer for both brands; this page is not produced, sponsored or endorsed by the manufacturers.
Photos: AirGreen and manufacturers, for identification.
Does a figure look wrong to you? Write to us: any reported value is checked again.