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GENERAL AIRSTAGE // Wall heat pumps

GENERAL AIRSTAGE wall heat pumps: at the same size, the cold is what sets the 13 series apart

51 wall models, from 9,000 to 36,000 BTU. At 12,000 BTU, rated heating at −15 °C nearly doubles from one series to another: 8,500 BTU/h for the Altair 500, 16,600 BTU/h for the Orion XLTH, both ENERGY STAR certified. Pick a size; the table shows you the rest.

Book my free estimateCompare at the same size
51wall models online, in 13 series
9,000–36,000BTU nominal, from the smallest to the largest model
33.5SEER2, the best: Orion XLTH+ 9,000
−30 °Ccoldest point on the NEEP listings: Orion XLTH+
$2,688highest LogisVert: Altair 500 36,000Indicative amount. Only Hydro-Québec confirms the assistance granted.

Start with what matters

Your winter, your electrical panel, your priorities

Most heating at −15 °C 12,000 BTUR-32 only 5 seriesBuilt-in Wi-Fi 3 R-32 series115 V RL2, Altair 300The largest sizes 30,000 and 36,000 BTU

The tool // At the same size

Same size, different series: see what changes

Pick a size. Every wall model shown on airgreen.ca at that size lines up, from most to least heating at −15 °C. Press "Compare" on two rows to see the gap in numbers.

Size, BTU
Filters
13 models shown
Series · modelRated heating at −8.3 °CRated heating at −15 °CColdest point, NEEP listingLowest published heating temperatureSEER2 / HSPF2Indoor sound, quiet speedWi-FiENERGY STAR CanadaLogisVertCompare
Orion XLTHAOUH12KZAH1 · R-3210,000 BTU/h16,600 BTU/h−26 °C12,200 BTU/h · 76% of rated · COP 1.81−26 °C30.5 / 12.723 dB(A)Built in3554345cold climate$1,200
LZAHAOUG12LZAH1 · R-410A10,000 BTU/h16,600 BTU/h−26 °C11,800 BTU/h · 98% of rated · COP 1.55−26 °C29.4 / 12.723 dB(A)To be confirmed§2409902cold climate$1,200
LZASAOUG12LZAS1 · R-410A10,000 BTU/h16,600 BTU/h−21 °C15,000 BTU/h · 125% of rated · COP 2.10−21 °C29.4 / 12.923 dB(A)To be confirmed§2409903cold climate$1,200
Orion XLTH+AOUH12KTAP1 · R-329,600 BTU/h16,200 BTU/h−30 °C15,300 BTU/h · 100% of rated · COP 1.76−30 °C31.5 / 13.723 dB(A)Built in3723087cold climate$1,152
Altair 700AOUH12KMAS1 · R-328,700 BTU/h10,600 BTU/h−15 °C10,600 BTU/h · 76% of rated · COP 2.39−15 °C27.5 / 11.219 dB(A)Built in3436355cold climate$1,044
LMAHAOUH12LMAH1 · R-410A10,300 BTU/h10,300 BTU/h−26 °C6,180 BTU/h · 52% of rated · COP 1.40−26 °C23.0 / 11.219 dB(A)Optional2417191standard$515
LMASAOUH12LMAS1 · R-410A8,800 BTU/h10,300 BTU/h−15 °C10,700 BTU/h · 89% of rated · COP 2.45−15 °C23.0 / 11.119 dB(A)Optional2417197standard$440
LPASAOUH12LPAS1 · R-410A8,800 BTU/h†10,200 BTU/h†no NEEP listing−15 °C20.0† / 10.5†19 dB(A)Optionalno$0not ENERGY STAR
Altair 500AOUH12KPAS1 · R-328,700 BTU/h8,500 BTU/h−15 °C8,500 BTU/h · 61% of rated · COP 2.29−15 °C24.0 / 10.519 dB(A)Optional3554409standard$435
Altair 300AOUH12KNAS1 · R-327,500 BTU/h8,200 BTU/h−15 °C8,800 BTU/h · 73% of rated · COP 2.08−15 °C18.0 / 9.020 dB(A)Optionalno$0not ENERGY STAR
Altair 300AOLH12KNAS1 · R-32 · 115 V7,500 BTU/h8,200 BTU/h−15 °C8,200 BTU/h · 68% of rated · COP 2.18−15 °C17.0 / 9.020 dB(A)Optionalno$0not ENERGY STAR
LMASAOUG12LMAS1 · R-410A10,300 BTU/h†not publishedno NEEP listing−15 °C23.0† / 11.1†19 dB(A)Optionalno$0not ENERGY STAR
RL2AOU12RL2 · R-410A · 115 Vnot publishednot publishedno NEEP listing−10 °C16.0† / not published23 dB(A)Optionalno—not ENERGY STAR, no AHRI number

Orion XLTH AOUH12KZAH1

Rated heating at −8.3 °C
10,000 BTU/h
Rated heating at −15 °C
16,600 BTU/h
Coldest point, NEEP listing
−26 °C
Maximum heating at that point
12,200 BTU/h
SEER2
30.5
HSPF2 (region IV)
12.7
Indoor sound, quiet speed
23 dB(A)
LogisVert, indicative amount
$1,200

Altair 500 AOUH12KPAS1

Rated heating at −8.3 °C
8,700 BTU/h
Rated heating at −15 °C
8,500 BTU/h
Coldest point, NEEP listing
−15 °C
Maximum heating at that point
8,500 BTU/h
SEER2
24.0
HSPF2 (region IV)
10.5
Indoor sound, quiet speed
19 dB(A)
LogisVert, indicative amount
$435

Gap at −15 °C: 8,100 BTU/h, in favour of the Orion XLTH.

Heating capacities, COP, SEER2 and HSPF2: NEEP listings modified August 24, 2026, read October 29, 2026; ENERGY STAR certified values when a number appears in the ENERGY STAR column, otherwise values published on the listing. "Of rated": maximum heating at that point vs the same model's rated heating at 8.3 °C. Lowest published heating temperature: our product pages. Sound: the lowest published level, at quiet speed, usually measured in cooling (the Altair 700 goes from 19 to 21 dB(A) in heating). ENERGY STAR: Canadian list, searched by AHRI number and by model number on October 29, 2026. LogisVert: participation guide v1.10, September 15, 2026, $50 or $120 (cold climate) per 1,000 BTU/h at −8 °C, nothing under 12,000 BTU/h nominal cooling; indicative amount, only Hydro-Québec confirms the assistance granted. † our product-page value, no NEEP listing; for the older R-410A series the efficiency shown may be a SEER rather than a SEER2. ‡ listed COP higher than at −15 °C: to be checked. § our product pages say "optional"; the February 3, 2020 press release announces built-in Wi-Fi for the LZA series: to be confirmed.

The 13 series

Five R-32 series, eight R-410A series

Each card counts the models shown on airgreen.ca today, with the series' published heating limit and best SEER2.

R-32

R-32

Orion XLTH+ KTAP1

  • 3 models · 9,000 to 15,000 BTU
  • Published limit: −30 °C
  • SEER2 up to 33.5
R-32

Orion XLTH KZAH

  • 5 models · 9,000 to 24,000 BTU
  • Published limit: −26 °C
  • SEER2 up to 33.1
R-32

Altair 700 KMAS

  • 2 models · 9,000 to 12,000 BTU
  • Published limit: −15 °C
  • SEER2 up to 30.0
R-32

Altair 500 KPAS

  • 6 models · 9,000 to 36,000 BTU
  • Published limit: −15 °C
  • SEER2 up to 26.0
R-32

Altair 300 KNAS

  • 6 models · 9,000 to 24,000 BTU
  • Published limit: −15 °C
  • SEER2 up to 20.0

R-410A

R-410A

LZAH

  • 3 models · 9,000 to 15,000 BTU
  • Published limit: −26 °C
  • SEER2 up to 33.1
R-410A

LZAS

  • 3 models · 9,000 to 15,000 BTU
  • Published limit: −21 °C*
  • SEER2 up to 33.1
R-410A

LMAH

  • 2 models · 9,000 to 12,000 BTU
  • Published limit: −26 °C*
  • SEER2 up to 26.5
R-410A

LMAS

  • 6 models · 9,000 to 24,000 BTU
  • Published limit: −15 °C*
  • SEER2 up to 26.5
R-410A

LPAS

  • 6 models · 9,000 to 36,000 BTU
  • Published limit: −15 °C*
  • SEER2 up to 20.0
R-410A

RLX

  • 5 models · 18,000 to 30,000 BTU
  • Published limit: −20 to −26 °C*
  • SEER2 up to 20.0
R-410A

RLB

  • 2 models · 18,000 to 24,000 BTU
  • Published limit: −15 °C*
  • SEER(2) up to 19.0†
R-410A

RL2 115 V

  • 2 models · 9,000 to 12,000 BTU
  • Published limit: −10 °C*
  • SEER(2) up to 16.0†

* Limit from our product pages, not yet checked against a manufacturer document. † Value from our product pages, no NEEP listing: for these older R-410A series it may be a SEER rather than a SEER2.

Who brings what

The machine comes from GENERAL. The rest is us.

GENERAL manufacturer

  • 13 wall series, 9,000 to 36,000 BTU, in R-32 or R-410A.
  • The technical documents and the values listed with NEEP and ENERGY STAR.
  • The manufacturer's limited warranty, as it publishes it.

The 51 GENERAL AIRSTAGE wall heat pumps

Price by quote.

Features

What each R-32 series offers, according to GENERAL

R-32 seriesOrion XLTH+Orion XLTHAltair 700Altair 500Altair 300
Lowest published heating temperature−30 °C−26 °C−15 °C−15 °C−15 °C
Low-temperature lockoutNoneNoneNonenot publishednot published
Wi-FiBuilt inBuilt inBuilt inOptional adapterOptional adapter
Base pan heaterYesYesnot publishednot publishednot published
115 VNoNoNoNoYes, at 9,000 and 12,000
Fan speedsnot read64not publishednot published
Indoor unit (H × W × D)295 × 894 × 280 mm, 14 kg280 × 980 × 240 mm, 12.5 kg (9,000 to 15,000)270 × 834 × 222 mm, 10 kgnot publishednot published

"Not published": no manufacturer document read so far says so. "Not read": the manual gives the value, but we could not read it. Sources: series pages on airstagehvac.com, press releases of February 10, 2025, technical manuals DR_AS231ES_03 (Altair 700, p. 2), DR_AS233ES_02 (Orion XLTH, p. 2-5) and DR_AS242ES_04 (Orion XLTH+, p. 2-3).

The cold, series by series

How cold each series heats

Each series' published heating limit: the lowest outdoor temperature with a published heating value, from −10 °C to −30 °C. When the models in a series do not share the same limit, both values are shown.

Orion XLTH+−30 °C
Orion XLTH−26 °C
Altair 700−15 °C
Altair 500−15 °C
Altair 300−15 °C
LZAH−26 °C
LZAS−21 °C*
LMAH−26 °C*
LMAS−15 °C*
LPAS−15 °C*
RLX−20 to −26 °C*
RLB−15 °C*
RL2−10 °C*

R-32: limits published by GENERAL on its series pages (read October 29, 2026). LZAH: "as low as −15 °F" (−26 °C), press release of February 3, 2020. * Other R-410A series: limit on our product pages, not yet checked against a manufacturer document.

Sound

As low as 19 dB(A) indoors, at quiet speed

20 dB(A)A whisper heard one metre away, on the Québec.ca scale. The Altair 500, Altair 700 and the LPAS, LMAS and LMAH series go down to 19 dB(A) at 9,000 and 12,000 BTU; the Orion models, to 23 dB(A).
30 dB(A)"Low-voice conversation". 15 of the 51 models, from 18,000 to 36,000 BTU, are at 30 to 33 dB(A) on quiet speed. At top speed, the indoor units reach 41 to 51 dB(A).
40 dB(A)A library, a refrigerator: a place "perceived as peaceful". Québec.ca also notes that 40 dB(A) outdoors can disturb sleep.
50 dB(A)"Start of disturbance (nuisance)". The outdoor units of GENERAL wall heat pumps are published at 44 to 56 dB(A): where they go is chosen with the bedroom windows in mind, yours and the neighbour's.

Manufacturer levels, as shown on our product pages. The Orion XLTH technical manual (DR_AS233ES_02) states they are measured in an anechoic chamber and that the installed level may be higher; the Orion XLTH+ manual (DR_AS242ES_04) gives the same test method. Scale: Québec.ca, "Mesure du bruit", updated June 16, 2022.

GENERAL // Did you know

Three things GENERAL's own documents say about its wall heat pumps

Did you know · The ranking

GENERAL ranks its five R-32 wall series in tiers. Which one is on top?

Did you know · The generations

Do the LZ and LM indoor units launched in 2020 work with the older outdoor units?

Did you know · The name

What do the letters XLTH in the two Orion series stand for?

The refrigerant

R-32 or R-410A: what changes for you

5 R-32 seriesAltair 300, 500 and 700, Orion XLTH and XLTH+. Global warming potential of 675, per the ENERGY STAR records.
8 R-410A seriesLZAH, LZAS, LMAH, LMAS, LPAS, RLX, RLB and RL2. Global warming potential of 2,088.
A2LR-32 is classed A2L ("mild flammability", in GENERAL's words), and GENERAL states it is not a drop-in replacement for R-410A.

Sources: ENERGY STAR records (refrigerant field), read October 29, 2026; GENERAL, "R-32 Refrigerant" brochure, rev. 6/2024, and "Next-Gen R-32" page.

LogisVert

24 of 51 wall models have an indicative LogisVert amount above $0

The LogisVert guide's rule (v1.10, September 15, 2026): $50 per 1,000 BTU/h of heating capacity at −8 °C for an ENERGY STAR heat pump, $120 if it is also "cold climate", and nothing when the outdoor unit is under 12,000 BTU/h of nominal cooling. That is why the ENERGY STAR certified 9,000 BTU models show $0. Models without ENERGY STAR certification show $0 or nothing, whatever their size.

The amounts in the table are indicative amounts. Only Hydro-Québec confirms the assistance granted: have Hydro-Québec confirm your file before counting on an amount.

The LogisVert rules, explained by AirGreen

Questions

What people ask us about GENERAL wall heat pumps

Which GENERAL wall heat pump heats at the lowest temperature?

The Orion XLTH+: it is published to heat down to −30 °C, and its NEEP listing still shows up to 15,300 BTU/h at −30 °C for the 12,000 BTU. Next, at −26 °C, come the Orion XLTH, the LZAH and LMAH series and the RLX models whose number ends in H.

Which ones have built-in Wi-Fi?

Among the R-32 series: the Orion XLTH+, Orion XLTH and Altair 700; the Altair 500 and Altair 300 take it with an optional adapter. For the R-410A series our product pages show an optional adapter; for the LZAH and LZAS, a 2020 press release announces built-in Wi-Fi: ask us to confirm it for the model you choose.

Which ones run on 115 V?

Two series: the RL2 (9,000 and 12,000 BTU, R-410A) and the 115 V Altair 300 (AOLH09KNAS1 and AOLH12KNAS1, R-32). All the others need a 208-230 V circuit. Either way, we check your panel and the circuit needed on site.

Which is the quietest in the room?

At quiet speed, 19 dB(A): the Altair 500, Altair 700 and the LPAS, LMAS and LMAH series at 9,000 and 12,000 BTU, just under a whisper heard one metre away (20 dB(A)) on the Québec.ca scale. The Orion models are at 23 dB(A) in those two sizes, between a whisper and a low-voice conversation (30 dB(A)). These are manufacturer levels; once installed, a unit can be a little louder.

What are the largest sizes?

30,000 and 36,000 BTU: the Altair 500 (R-32) and the LPAS series, plus the RLX at 30,000. Set the table to 30,000 to see them side by side. The right size is decided on site.

Why do the 9,000 BTU models have no LogisVert amount?

The LogisVert guide requires an outdoor unit of at least 12,000 BTU/h of nominal cooling. A 9,000 BTU unit falls short, even when certified ENERGY STAR cold climate.

How do I know which size I need?

On site. We come and look at the room, its insulation, its windows and where the outdoor unit will go, then we recommend a series and a size. The table is for comparing, not sizing.

At 12,000 BTU, what does the Altair 700 add over the Altair 500?

More rated heating at −15 °C (10,600 BTU/h vs 8,500), a SEER2 of 27.5 vs 24.0, built-in Wi-Fi and the ENERGY STAR cold-climate mark, hence a LogisVert amount of $1,044 vs $435 (indicative amounts; only Hydro-Québec confirms the assistance granted). Both go down to 19 dB(A). The Altair 700 stops at 12,000 BTU; the Altair 500 goes up to 36,000.

AirGreenGENERAL

Your GENERAL AIRSTAGE wall heat pump, chosen in your home and installed by AirGreen.

We come and see the room, we compare the series at the right size with you, and we give you the AHRI number of the model you choose and its indicative LogisVert amount.

Sold and installed by AirGreen.

Book my free estimate514 316-2973

Sources

Where the numbers come from

  1. GENERAL, AIRSTAGE wall-mounted page (R-32 series tiers), airstagehvac.com, read October 29, 2026.
  2. GENERAL, technical manuals DR_AS231ES_03 (Altair 700, January 17, 2025), DR_AS233ES_02 (Orion XLTH, January 17, 2025) and DR_AS242ES_04 (Orion XLTH+, July 30, 2025).
  3. Manufacturer press releases: LZ and LM wall units (February 3, 2020); Altair and Orion XLTH+ (February 10, 2025).
  4. GENERAL, "R-32 Refrigerant" brochure, rev. 6/2024, and "Next-Gen R-32" page.
  5. NEEP cold-climate heat pump list, listings by AHRI number modified August 24, 2026, read October 29, 2026.
  6. ENERGY STAR certified heat pumps, Canadian market, read October 29, 2026.
  7. Hydro-Québec, LogisVert participation guide, residential customers, version 1.10, September 15, 2026, p. 14-15 (amounts) and 16 (invoice).
  8. Québec.ca, "Mesure du bruit", updated June 16, 2022.
  9. airgreen.ca product pages, read October 29, 2026 (sizes, lowest heating temperatures, sound, Wi-Fi, amounts).

Page updated October 29, 2026. Indicative LogisVert amounts: only Hydro-Québec confirms the assistance granted. Price by quote.