Meet the Thermolux Gree Multi21+ series — flexible, inverter-driven ductless mini-split heat pumps built for multi-zone comfort across Greater Montreal, Laval, Longueuil, the South Shore and the North Shore. Spanning 18 000 to 42 000 BTU and supporting two to five zones per outdoor unit, Multi21+ systems balance capacity and control to match small apartments, multi-room homes and light-commercial spaces.

Designed for quiet, efficient operation, Thermolux Multi21+ leverages G10 inverter technology, eco-friendly R410A refrigerant and intelligent safeguards to fine-tune room-by-room temperatures while keeping energy costs in check. With dependable heating down to −20 °C and cooling from −18 °C to 48 °C, these compact split systems deliver year-round comfort in Quebec’s variable climate.

• G10 inverter technology for precise temperature regulation and optimized power draw across multiple zones.
• High efficiency with ratings up to 22 SEER and 11.5 HSPF to help reduce utility bills.
• Low-noise performance with outdoor sound levels as low as 56 dB(A) for a calmer acoustic profile.
• Smart reliability including auto-diagnostics, intelligent defrost, low-voltage start, washable filters and optional wired/remote controls.
• Multi-zone flexibility supporting 2-, 3-, 4- and 5-zone configurations with R410A refrigerant and built-in Wi-Fi.

10-Year Warranty: Compressor and parts are covered for ten years, with optional 10-year labor available for added peace of mind.

Combinations:

MULTI18HP230V1CO: 9+9; 9+12

MULTI24HP230V1CO: 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

MULTI30HP230V1CO: 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+12+12

MULTI36HP230V1CO: 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; 9+9+9+9+9; 9+9+9+9+12

MULTI42HP230V1CO: 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