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AMERISTAR · Multi-zone · 19 Series

AMERISTAR 19 Series multi-zone heat pumps

Which outdoor unit for your number of rooms? The 19 Series runs from 18,000 to 42,000 BTU/h and from 2 to 5 wall heads. Pick the number of rooms: the grid shows, for each unit, how many combinations the brand approves, the value listed on NEEP at -15°C and the LogisVert indicative amount.

  • 5 units, 18,000 to 42,000 BTU/h
  • SEER2 19 · HSPF2 10 (region IV) and 7.8 (region V) per NEEP
  • ENERGY STAR cold climate
  • 2 to 5 wall heads

How many rooms?

For each unit: the number of head combinations the brand approves, the value listed on NEEP and the LogisVert indicative amount.

Number of rooms

For 3 rooms, the smallest unit is the 24,000 BTU/h: the brand approves 5 combinations on it, and NEEP lists 21,600 BTU/h at -15°C for this unit.

Outdoor unitApproved combinations for 3 headsAt -15°C, NEEP value of the unitMax. capacity listed at -30°C (NEEP)LogisVert indicative amount (AirGreen's calculation)
18,000 BTU/h—13,600 BTU/h10,200 BTU/h$1,800
24,000 BTU/h521,600 BTU/h17,220 BTU/h$2,832
30,000 BTU/h7 †22,800 BTU/h20,020 BTU/h$3,264
36,000 BTU/h1432,400 BTU/h *24,020 BTU/h$3,696
42,000 BTU/h1832,400 BTU/h24,500 BTU/h$4,272

Swipe the table to see every column.

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). † Including one trio printed "9+1+18" on the sheet: most likely 9 + 12 + 18, to be confirmed.

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); ENERGY STAR ductless heat pumps (Canadian market), 2415510, 2415482, 2415511 to 2415513 (data of Nov. 4, 2026); Hydro-Québec, LogisVert residential participation guide v1.10 (Appendix I) (Sept. 15, 2026)

One unit, four room counts: the 42,000 BTU/h

The number of combinations the brand approves on the 42,000 BTU/h, by number of heads connected.

Heads connectedApproved combinations
2 heads10
3 heads18
4 heads18
5 heads12

The outdoor units

UnitModelAHRIENERGY STARMax. headsAt -8.3°C (NEEP)At -15°C (NEEP)Max. breaker
18,000 BTU/hM4THM1918A12NA2104882592415510215,000 BTU/h13,600 BTU/h20 A
24,000 BTU/hM4THM1924A13NA2104882602415482323,600 BTU/h21,600 BTU/h25 A
30,000 BTU/hM4THM1930A14NA2104882612415511427,200 BTU/h22,800 BTU/h35 A
36,000 BTU/hM4THM1936A14NA2104882622415512430,800 BTU/h32,400 BTU/h *45 A
42,000 BTU/hM4THM1942A15NA2104882632415513535,600 BTU/h32,400 BTU/h45 A

Swipe the table to see every column.

Did you know?

The 17 and 23 Series wall heads (M4MHW17 and M4MHW23) are also the heads approved for the 19 Series multi-zone.

Sell sheets 92-7323-02 and 92-7323-03, p. 2

The 19 Series' published heating range runs from -30°C to 24°C.

Sell sheet 92-7323-03

Port adapters are included ("Port adapters included").

Sell sheet 92-7323-03

LogisVert: indicative amount

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.

UnitHeating at -8.3°C listed on NEEPIndicative amount
18,000 BTU/h15,000 BTU/h$1,800
24,000 BTU/h23,600 BTU/h$2,832
30,000 BTU/h27,200 BTU/h$3,264
36,000 BTU/h30,800 BTU/h$3,696
42,000 BTU/h35,600 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.

Frequently asked questions

How many heads per unit?

2 on the 18,000, 3 on the 24,000, 4 on the 30,000, 4 on the 36,000 and 5 on the 42,000, according to sheet 92-7323-03.

Why does the 36,000 give more at -15°C than at -8.3°C?

That is how NEEP and ENERGY STAR list it: 30,800 BTU/h at -8.3°C and 32,400 at -15°C. We show both values as listed.

What LogisVert amount for the 19 Series?

From $1,800 for the 18,000 to $4,272 for the 42,000 BTU/h: indicative amounts, calculated by AirGreen at the guide's cold-climate rate. Only Hydro-Québec confirms the grant.

What AirGreen does

  • An on-site assessment before the quote: the size is chosen in your home, not from a spec sheet.
  • Installation by our technicians: connections, start-up and a walkthrough included.
  • Montreal, Laval, Longueuil, the South Shore and the North Shore.

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.

Request a quote514-316-2973

Sources

  1. AMERISTAR 19 Series Multi Zone sell sheet, 92-7323-03 · © 2024
  2. NEEP cold-climate heat pump list, records 65383 to 65387 · modified Aug. 24, 2026
  3. ENERGY STAR ductless heat pumps (Canadian market), 2415510, 2415482, 2415511 to 2415513 · data of Nov. 4, 2026
  4. Hydro-Québec, LogisVert residential participation guide v1.10 (Appendix I) · Sept. 15, 2026
  5. AMERISTAR ductless systems limited warranty, GW-600-2100A · © 2020

Sources read on Nov. 5, 2026. NEEP lists these values; it does not certify them.