Multi Zone Heating & Cooling Systems
MULTI ZONE HEATING AMERISTAR COMPRESSOR -30°C

Meet the Thermolux Ameristar multi-zone series — robust, inverter-driven ductless heat pumps purpose-built for flexible comfort across Greater Montreal, Laval, Longueuil, the South Shore and the North Shore. Spanning 18 000 to 42 000 BTU, a single outdoor unit can serve from two up to five zones (model-dependent), so you can tailor heating and cooling room by room while optimizing energy use.

Designed for our Quebec climate, these compact split systems provide reliable cooling and dependable low-ambient heating down to −30 °C. Pair them with a variety of indoor heads to fine-tune capacity, acoustics and aesthetics for each space.

  • High efficiency with Energy Star® performance up to 21 SEER to help cut utility bills without sacrificing comfort.
  • Quiet, durable construction with a reinforced outdoor cabinet and anti-corrosion coil coating for long service life.
  • Smart options including built-in diagnostics, intelligent defrost and optional Wi-Fi control for remote temperature management.
  • True multi-zone flexibility — mix indoor unit sizes to match real-world loads, from compact bedrooms to open living areas.

10-Year Warranty: Enjoy a decade of coverage on compressor and parts with Thermolux for lasting peace of mind.

Combinations:

M4THM1918A12N: 9+9; 9+12; 12+12

M4THM1924A13N: 9+9; 9+12; 9+18; 12+12; 12+18; 18+18; 9+9+9; 9+9+12; 9+9+18; 9+12+12; 12+12+12

M4THM1930A14N: 9+9; 9+12; 9+18; 9+24; 12+12; 12+18; 12+24; 18+18; 18+24; 9+9+9; 9+9+12; 9+9+18; 9+9+24; 9+12+12; 9+12+18; 12+12+12; 12+12+18; 9+9+9+9; 9+9+9+12; 9+9+9+18; 9+9+12+12

M4THM1936A14N: 9+9; 9+12; 9+18; 9+24; 12+12; 12+18; 12+24; 18+18; 18+24; 24+24; 9+9+9; 9+9+12; 9+9+18; 9+9+24; 9+12+12; 9+12+18; 9+12+24; 9+18+18; 12+12+12; 12+12+18; 12+12+24; 12+18+18; 9+9+9+9; 9+9+9+12; 9+9+9+18; 9+9+12+12; 9+9+12+18; 9+12+12+12; 12+12+12+12

M4THM1942A15N: 9+9; 9+12; 9+18; 9+24; 12+12; 12+18; 12+24; 18+18; 18+24; 24+24; 9+9+9; 9+9+12; 9+9+18; 9+9+24; 9+12+12; 9+12+18; 9+12+24; 9+18+18; 12+12+12; 12+12+18; 12+12+24; 12+18+18; 9+9+9+9; 9+9+9+12; 9+9+9+18; 9+9+12+12; 9+9+12+18; 9+12+12+12; 9+12+12+18; 12+12+12+12; 9+9+9+9+9; 9+9+9+9+12; 9+9+9+9+18; 9+9+9+9+24; 9+9+9+12+12; 9+9+9+12+18; 9+9+9+18+18; 9+9+12+12+12; 9+9+12+12+18; 9+12+12+12+12; 9+12+12+12+18; 12+12+12+12+12

SEER: 21 dB: 63 Model #: M4THM1918A12N, M4THM1924A13N, M4THM1930A14N, M4THM1936A14N, M4THM1942A15N AHRI #: 210488259, 210488260, 210488261, 210488262, 210488263 °C: -30 Serie: COMPRESSOR

Efficiency

Up to
21 SEER
Up to
13 EER
Up to
11 HSPF
Ultra heat down to
-30 °C

BTU

9,000 BTU
300 – 500 sq ft
12,000 BTU
400 – 650 sq ft
18,000 BTU
600 – 1000 sq ft
24,000 BTU
800 – 1,300 sq ft
30,000 BTU
1,100 – 1,600 sq ft
36,000 BTU
1,400 – 2,000 sq ft
42,000 BTU
1,950 – 2,300 sq ft

Characteristics

EFFICIENCY
  • Up to 21 SEER
  • Up to 13 EER
  • Up to 11 HSPF
  • Ultra heat down to -30°C
PERFORMANCE
  • Quiet Operation 63 dB
  • Non-ozone depleting R-410A refrigerant
TECHNOLOGY
  • Variable-speed inverter compressor
  • Low-ambient heating down to -30 °C
  • Energy Star certified
  • Blue Fin anti-corrosion coating
  • Optional WiFi
AESTHETICS
  • Clean, discreet design
  • Compact wall-mounted units
  • Uniform white finish
  • Low-profile outdoor unit
SUBSIDIES
  • LogisVert
  • Up to $

Warranty

  • 10 years parts limited warranty1
  • 10 years labor warranty1


Notes

  • 1 To the original owner, when product is used in an owner-occupied residence, he is covered a 10-year parts limited warranty.

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