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AMERISTAR · Multi-zone · 19 Series · 2 zones

AMERISTAR 19 Series heat pump, 2 zones

Two rooms, one outdoor unit: which heads, on which unit? All 5 19 Series units accept two heads. Pick the head size for each room: the tool keeps the kits on which the brand approves that pair, with the value listed on NEEP at -15°C for the unit and each room's share of the connected nominal.

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

Two rooms

Pick the head size for each room: the tool keeps the kits on which the brand approves that combination.

Room 1 (BTU/h)
Room 2 (BTU/h)

The 9 + 12 combination (thousands of BTU/h) is approved by the brand on the 18,000, 24,000, 30,000, 36,000 and 42,000 BTU/h units.

KitAt -15°C, NEEP value of the unitIndicative amount (AirGreen's calculation)
18,000 BTU/h13,600 BTU/h$1,800
24,000 BTU/h21,600 BTU/h$2,832
30,000 BTU/h22,800 BTU/h$3,264
36,000 BTU/h32,400 BTU/h *$3,696
42,000 BTU/h32,400 BTU/h$4,272

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)

An 18,000 head in the pair

With an 18,000 head, the brand approves the pair only from the 24,000 BTU/h up.

Pair (thousands of BTU/h)18,00024,00030,00036,00042,000
9 + 18noyesyesyesyes
12 + 18noyesyesyesyes
18 + 18noyesyesyesyes

Swipe the table to see every column.

The outdoor units

UnitModelAHRIENERGY STARMax. headsAt -8.3°C (NEEP)At -15°C (NEEP)Max. overcurrent protection (breaker) · sell sheet
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 18,000 BTU/h unit accepts only 3 pairs: 9 + 9, 9 + 12 and 12 + 12 (thousands of BTU/h).

Sell sheet 92-7323-03, combination table

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.

These amounts are indicative. Only Hydro-Québec confirms the grant, based on its list in force on the installation date.

Frequently asked questions

Can two head sizes be mixed?

Yes: the brand approves pairs of different sizes; 9 + 12, for example, fits on all 5 units.

Are two outdoor units needed for two rooms?

No: a 19 Series 2-zone kit connects two wall heads to a single outdoor unit.

What LogisVert amount for a 2-zone kit?

An indicative amount of $1,800 (18,000) to $4,272 (42,000), 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. According to the brand, exclusions tied to registration and its transfer vary by province in Canada.

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.