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This chart compares winter performance curves between a Willis heat pump and a standard model, highlighting capacity stability at low temperatures and performance gaps in extreme cold.

This visual compares traditional ON/OFF heating with inverter modulation, illustrating how controlled compressor speed lowers energy consumption while maintaining stable indoor comfort.

Installation quality is a critical factor in heat pump performance. Proper sizing and professional installation ensure efficiency, reliability, and long-term comfort.

This visual shows that two heat pumps rated at the same 18,000 BTU capacity can perform very differently, especially under real cold-climate operating conditions.

This image highlights the essential role of an HRV/ERV system in maintaining indoor comfort, air balance, and energy efficiency during winter.

This visual highlights five common habits that can reduce a heat pump’s heating capacity and drive up energy costs during winter, especially in cold climates like Quebec.

This diagram explains how an intelligent heat pump defrost cycle works in cold climates, from frost detection and cycle reversal to fan control and a smooth return to heating.

Designed for the Quebec climate, Willis heat pumps deliver consistent thermal comfort through inverter technology and intelligent defrosting, even in extreme winter conditions.

Willis logistics is a core pillar of system reliability, ensuring equipment availability, efficient inventory management, and continuous technical support for HVAC professionals.

Engineered for cold climates, Willis heat pumps deliver stable, reliable performance even in extreme winter conditions.

Introduction Heat pump systems designed for the North American climate must withstand extreme conditions: prolonged cold, rapid temperature fluctuations, high humidity levels, and significant thermal loads. At Willis, more than fifteen years of field experience have shaped a unique engineering approach focused on real-world performance rather than theoretical output. This fundamental difference guides every phase of development: mechanical design, control algorithms, frost m

If you're exploring ductless heat pump systems , one important decision is whether to choose a single-zone  or a multi-zone  system. But...