Meet the Thermolux Gree Multi+ Ultra series — versatile, inverter-driven ductless mini-split heat pumps engineered for flexible multi-zone comfort across Greater Montreal, Laval, Longueuil, the South Shore and the North Shore. Spanning 18 000 to 42 000 BTU and supporting 2 to 5 zones per outdoor unit, these systems deliver dependable performance with low-ambient heating down to -35 °C.

Optimized for quiet operation and adaptable installations, Thermolux Multi+ Ultra outdoor units pair with a wide range of indoor heads to fine-tune capacity room by room, reduce energy waste and simplify everyday control for homes and light-commercial spaces.

• G10 inverter technology for precise temperature regulation and optimized power draw across multiple zones.
• Cold-climate comfort with robust low-ambient heating down to -35 °C for Quebec winters.
• Quiet performance thanks to variable-speed compression and intelligent defrost management.
• Reliability and control with built-in Wi-Fi, auto-diagnostics, low-voltage start and anti-corrosion coated fins.
• R410A refrigerant and multi-zone compatibility for 2, 3, 4 or 5 zones depending on the outdoor model.

10-Year Warranty: Compressor and parts are covered for ten years for lasting peace of mind.

Combinations:

MULTIU18HP230V1DO: 9+9; 9+12

MULTIU24HP230V1DO: 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

MULTIU36HP230V1DO: 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

MULTIU42HP230V1DO: 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