514-316-2973
sales@airgreen.ca
It is the only LENNOX wall unit in our catalogue in 115 V, at 9,000 and 12,000 BTU/h. LENNOX prints different numbers for each voltage, and they don’t always point the same way: at 12,000, the 115 V has the better certified rating at -8.3 °C, the 208-230 V gives more heat at -15 °C in the table. We show you everything, with each one’s electrical circuit.
From 9,000 to 24,000 BTU/h, in 115 V or 208-230 V. Open a product page for the AHRI number and dimensions.
Two LENNOX sources side by side: the AHRI rating (standard test, at 8.3 and -8.3 °C) and the heating table in bulletin 210901, at 21 °C indoors. Plus the circuit each version calls for.
AHRI rating: certified heat printed by LENNOX at 47 °F and 17 °F (8.3 and -8.3 °C). Table: total heat from bulletin 210901, 21 °C indoors. The MHA has no row below -15 °C: that is the limit of its heating range.
MHA012S4S-1L + MWHA012S4-1L · AHRI 204014489
7,500BTU/hAHRI rating at -8.3 °C (17 °F), printed by LENNOX. That is 700 BTU/h more than the 208-230 V version (6,800).
115 V, LENNOX table208-230 V, LENNOX table
At -15 °C, the limit of its range, the table gives 6,470 BTU/h in 115 V and 8,020 BTU/h in 208-230 V. The two LENNOX sources point in opposite directions: the certified rating favours the 115 V, the table, the 208-230 V.
Electrical side: for this version, LENNOX calls for a circuit of at least 15 A (MCA), protected at 20 A at most (MOCP). We check the panel and the circuit at the visit, before installation.
LENNOX published their bulletins eight months apart (April and December 2020). Same refrigerant, same 208-230 V; the MPB is a 2nd generation, with another head and another floor.
Pink rows are the differences. LENNOX bulletins 210901 (April 2020) and 210863 (December 2020). Both series are rated in SEER and HSPF: these numbers compare with each other. Warranties: W900004-02 and EW900011-01. The MPB page.
In the LENNOX legend, the 1 is the revision and the letter is the voltage: L for 115 V, P for 208/230 V. The head takes the same letter: the MHA012S4S-1L pairs with the MWHA012S4-1L.
LENNOX, bulletin 210901, p. 2 and 12.SEER 19 and HSPF 10 for the MHA009S4S-1L, against 18 and 9.5 for the -1P. But at -15 °C, the 208-230 V table gives 8,230 BTU/h, the 115 V one, 6,320 BTU/h.
LENNOX, bulletin 210901, p. 12, 15 and 16.The LENNOX certificate marks MHA and MWHA with an asterisk: no extension, with or without registration. That leaves 7 years on the compressor and 5 years on the other covered parts.
LENNOX, W900004-02 (November 11, 2025); bulletin 210901, p. 3.The warranty is read in the LENNOX certificates; the LogisVert amount, on Hydro-Québec’s list, as carried on our product pages.
LENNOX, Basic Limited Warranty W900004-02 (November 11, 2025); bulletin 210901, p. 3.
Why no amount: the LogisVert guide requires an ENERGY STAR certified unit, and none of the six MHA AHRI numbers is in the ENERGY STAR registry checked on October 28, 2026. Amounts read from our product pages (Hydro-Québec list of Oct. 6, 2026, latest check); indicative amounts: only Hydro-Québec confirms the assistance granted. Our LogisVert page.
LENNOX bulletin 210901 (April 2020) and instructions 507927-01 (June 2019). Sound is the outdoor unit’s.
| Model | AHRI | Outdoor sound | Piping · height | Liquid · gas | MCA · MOCP | R-410A charge | MWHA head (W × H × D) |
|---|---|---|---|---|---|---|---|
| MHA009S4S-1L | 204014488 | 52 dB(A) | 82 ft · 33 ft | 1/4 · 3/8 in. | 16 · 20 A | 1 lb 14 oz | 29-5/8 × 11-3/8 × 8-5/8 in. 752 × 289 × 219 mm |
| MHA009S4S-1P | 204014490 | 52 dB(A) | 82 ft · 33 ft | 1/4 · 3/8 in. | 10 · 15 A | 1 lb 14 oz | 29-5/8 × 11-3/8 × 8-5/8 in. 752 × 289 × 219 mm |
| MHA012S4S-1L | 204014489 | 55 dB(A) | 82 ft · 33 ft | 1/4 · 1/2 in. | 15 · 20 A | 1 lb 14 oz | 32-3/4 × 11-3/4 × 8-3/4 in. 832 × 298 × 222 mm |
| MHA012S4S-1P | 204014491 | 55 dB(A) | 82 ft · 33 ft | 1/4 · 1/2 in. | 15 · 15 A | 1 lb 14 oz | 32-3/4 × 11-3/4 × 8-3/4 in. 832 × 298 × 222 mm |
| MHA018S4S-1P | 204014492 | 57.5 dB(A) | 98 ft · 66 ft | 1/4 · 1/2 in. | 15 · 20 A | 2 lb 12 oz | 39-1/8 × 12-1/2 × 9-7/8 in. 994 × 318 × 251 mm |
| MHA024S4S-1P | 204014493 | 58 dB(A) | 98 ft · 66 ft | 3/8 · 5/8 in. | 20 · 25 A | 3 lb 15 oz | 44 × 13-1/4 × 10-1/4 in. 1118 × 337 × 260 mm |
Minimum line: 10 ft. Factory charge covers 25 ft of line; beyond that, 0.16 oz of R-410A per foot (0.32 oz for the 24,000). The outdoor unit may sit above or below the head.
The 1 is the revision and the letter is the voltage: L for 115 V, P for 208/230 V, single phase, 60 Hz. The head carries the same letter as the outdoor unit: the MHA012S4S-1L goes with the MWHA012S4-1L.
For the 115 V 9,000, LENNOX calls for a circuit of at least 16 A protected at 20 A at most; for the 115 V 12,000, 15 A and 20 A. We check the panel at the visit: AirGreen holds RBQ subclass 16 (electrical).
LENNOX gives it a heating range of 5 to 86 °F, i.e. -15 to 30 °C, and its table stops at -15 °C. At Montréal-Trudeau, the January average low is -13.5 °C and about 12 nights a year drop below -20 °C: keep your existing heating for those nights.
LENNOX certificate W900004-02 marks MHA and MWHA with an asterisk: no extended warranty. That leaves 7 years on the compressor and 5 years on the other covered parts. The MLA and the MPB get 12 years parts and compressor in Québec, with no registration.
LENNOX doesn’t say. At that position, the legend in its bulletin prints “P = Heat Pump”, and the H is defined nowhere. We don’t make up a meaning for it.
No. The LogisVert guide requires an ENERGY STAR certified unit, and none of the six MHA AHRI numbers is in the ENERGY STAR registry (checked October 28, 2026). Only Hydro-Québec confirms the assistance granted.
Yes. See our LENNOX repair page, or send us a photo of the outdoor unit’s nameplate.
It is decided on site. We look at the room, the insulation, the windows, the heating in place and the electrical panel, then suggest the size. The estimate is free.
We look at the room, the electrical panel and what you already have on the wall, then give you a clear quote, with the unit’s AHRI number.
Hydro-Québec does not solicit anyone by phone or door to door for LogisVert. A call “from Hydro-Québec” selling a heat pump? Hang up.
LogisVert amounts are indicative: only Hydro-Québec confirms the assistance granted. Price on quote. Free in-home estimate.