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AMERISTAR · Multi-zone · 19 Series · 3 zones
Three rooms: what is the smallest unit that accepts your three heads? Four 19 Series units accept three heads, from the 24,000 BTU/h up. Pick the three head sizes: the tool keeps the kits on which the brand approves that trio, with the value listed on NEEP at -15°C for the unit.
Pick the head size for each room: the tool keeps the kits on which the brand approves that combination.
The 9 + 9 + 12 combination (thousands of BTU/h) is approved by the brand on the 24,000, 30,000, 36,000 and 42,000 BTU/h units.
| Kit | At -15°C, NEEP value of the unit | Indicative amount (AirGreen's calculation) |
|---|---|---|
| 24,000 BTU/h | 21,600 BTU/h | $2,832 |
| 30,000 BTU/h | 22,800 BTU/h | $3,264 |
| 36,000 BTU/h | 32,400 BTU/h * | $3,696 |
| 42,000 BTU/h | 32,400 BTU/h | $4,272 |
| Room | Head | Share of the connected nominal |
|---|---|---|
| Room 1 | 9,000 BTU/h | 30% |
| Room 2 | 9,000 BTU/h | 30% |
| Room 3 | 12,000 BTU/h | 40% |
| Total connected | 30,000 BTU/h | 100% |
Share: AirGreen's calculation on the heads' nominal sizes, rounded to the unit. NEEP lists one value per outdoor unit; the brand publishes no capacity per combination: the heat delivered depends on the heads connected. * 36,000 BTU/h: listed higher at -15°C than at -8.3°C on NEEP (32,400 against 30,800).
Sources: AMERISTAR 19 Series Multi Zone sell sheet, 92-7323-03 (© 2024); NEEP cold-climate heat pump list, records 65383 to 65387 (modified Aug. 24, 2026); Hydro-Québec, LogisVert residential participation guide v1.10 (Appendix I) (Sept. 15, 2026)
With 9 + 9 + 12 (thousands of BTU/h):
| Unit | Trio approved | Trios the brand approves | At -15°C, NEEP value of the unit | Indicative amount |
|---|---|---|---|---|
| 24,000 BTU/h | yes | 5 | 21,600 BTU/h | $2,832 |
| 30,000 BTU/h | yes | 7 † | 22,800 BTU/h | $3,264 |
Swipe the table to see every column.
† Including one trio printed "9+1+18" on the sheet: most likely 9 + 12 + 18, to be confirmed.
| Unit | Model | AHRI | ENERGY STAR | Max. heads | At -8.3°C (NEEP) | At -15°C (NEEP) | Max. breaker |
|---|---|---|---|---|---|---|---|
| 24,000 BTU/h | M4THM1924A13NA | 210488260 | 2415482 | 3 | 23,600 BTU/h | 21,600 BTU/h | 25 A |
| 30,000 BTU/h | M4THM1930A14NA | 210488261 | 2415511 | 4 | 27,200 BTU/h | 22,800 BTU/h | 35 A |
| 36,000 BTU/h | M4THM1936A14NA | 210488262 | 2415512 | 4 | 30,800 BTU/h | 32,400 BTU/h * | 45 A |
| 42,000 BTU/h | M4THM1942A15NA | 210488263 | 2415513 | 5 | 35,600 BTU/h | 32,400 BTU/h | 45 A |
Swipe the table to see every column.
In a trio, a 24,000 BTU/h head is approved only on the 36,000 or the 42,000 unit.
Sell sheet 92-7323-03, combination table
ENERGY STAR cold-climate units: $120 per 1,000 BTU/h of heating at -8°C (17°F; NEEP writes it -8.3°C), per the LogisVert guide v1.10.
| Unit | Heating at -8.3°C listed on NEEP | Indicative amount |
|---|---|---|
| 24,000 BTU/h | 23,600 BTU/h | $2,832 |
| 30,000 BTU/h | 27,200 BTU/h | $3,264 |
| 36,000 BTU/h | 30,800 BTU/h | $3,696 |
| 42,000 BTU/h | 35,600 BTU/h | $4,272 |
AirGreen's calculation: guide v1.10 rate × heating at -8.3°C listed on NEEP (ENERGY STAR for the central units).
These amounts are indicative. Only Hydro-Québec confirms the grant, based on its list in force on the installation date.
No: the brand approves mixed trios, for example 9 + 9 + 12 from the 24,000 BTU/h up.
Yes: 9 + 9 + 18 is approved from the 24,000 BTU/h up; 18 + 18 + 18 only on the 36,000 and the 42,000.
An indicative amount of $2,832 (24,000) to $4,272 (42,000), calculated by AirGreen at the guide's cold-climate rate. Only Hydro-Québec confirms the grant.
Sold and installed by AirGreen.
AMERISTAR limited warranty (sell sheet 92-7323-03 and warranty GW-600-2100A): 5 years on all parts, or 10 years (original purchaser) if the product is registered within 60 days of installation. Labour is not covered by the manufacturer. It applies to products installed in a residential or multi-family application.
Sources read on Nov. 5, 2026. NEEP lists these values; it does not certify them.