At Sub Zero Heating & Cooling, we install top-performing HVAC products designed specifically for life in the Cowichan Valley and lower Vancouver Island and tailored for your lifestyle. From helping you choose the right heat pump or tankless water heater to guiding you through rebate applications, our team handles everything from start to finish. The result? Reliable comfort, long-term savings, and a smoother experience from a local team that knows the Cowichan Valley inside and out.
Our focus is residential HVAC — including high-efficiency systems like air-to-water heat pumps that perform exceptionally well in BC’s climate.
We proudly serve homeowners in Duncan, Ladysmith, Lake Cowichan, Chemainus, Cobble Hill, Mill Bay, Crofton, Cassidy, and nearby areas.
Our HVAC systems are chosen for efficiency, durability, and compatibility with BC’s weather. Each install is handled by our in-house team of certified professionals — no subcontractors, no shortcuts.
Efficient comfort year-round
Our ductless and central heat pumps provide both heating and cooling while using a fraction of the energy of traditional systems. Ideal for the island’s climate, they offer comfort you can count on through the coldest winters and at the peak of summer heat.
Why homeowners across Cowichan choose our heat pumps:
Endless hot water — and no bulky tank
We install high-efficiency Navien tankless water heaters that deliver hot water on demand while saving space and energy. Perfect for modern homes looking to cut waste and maximize convenience — and trusted by homeowners across the Cowichan Valley.
Benefits of going tankless:
Comfort and control — from anywhere
Upgrade to smart home climate control with a thermostat that works around your schedule. Adjust settings, track usage, and fine-tune your comfort from your phone or tablet — no matter where you are.
Smart features include:
At Sub Zero Heating & Cooling, we believe the right installation is just as important as the right equipment. That’s why we do everything in-house — from design to HVAC installation Cowichan Valley homeowners can rely on — and back it all with honest advice and responsive service.
What sets us apart:
Reach out to us here and we will get back to you as soon as we can.
Upgrading your heating, cooling, or water system doesn’t just improve comfort — it can unlock thousands in rebates.
We’ll help you qualify for:
We are here for all of your questions and to provide whatever guidance you need while updating your current system, or installing your very first unit.
It depends on your home’s layout and energy use. We specialize in heat pumps that perform well in cold climates and help you choose the right size and type.
Yes — most of our systems qualify. We’ll walk you through the Fortis BC rebate process to ensure you get the most back.
Absolutely. Mini-split heat pumps are great for homes without existing ductwork or for adding comfort to specific areas.
Yes — our smart thermostats and Wi-Fi-enabled systems make remote control and scheduling easy.
We work across the Cowichan Valley, including Duncan, Ladysmith, Chemainus, Lake Cowichan, Mill Bay, Cobble Hill, Crofton, and Cassidy.
