Grants & Rebates up to $31,000!!

Towards an energy-efficient heating and cooling system for your home.

Contact Duncan’s Leading Heating & Air
Conditioning Company To Find Out More

We sell, install, and service quality HVAC systems to ensure your air conditioning and heating systems are operating at their absolute best. Whether you need HVAC maintenance, upgrades to your system, or repairs – we are ready and able to serve you.


Brand new Heat Pumps, Air Conditioning Units, & Hot Water Heaters.


Keeping Your Units Running Smoothly & Effeciently All Year Round.


From Trouble-Shooting to Problem Solving, Fast & Efficient Service.

Get started right now
Sub Zero Heating & Cooling


Residential & Light Commercial Installations

Proudly serving Duncan, Chemainus, Ladysmith, Cobble Hill, Mill Bay and the Cowichan Valley. Sub Zero Heating & Cooling is your first call for heat pumps, air conditioners, and hot water heaters.

Our experience and reputation make us the easy choice. We have helped hundreds of Duncan area residents. Call today to have us start taking care of you, too!

Local and Proud

Serving The South Island & Gulf Islands For More than 9 Years

What We Provide

Sub Zero Services

From installation to keeping things running smoothly years down the road, Sub Zero is your best choice for HVAC sales, installation, service, and repairs.

Heat Pumps
Air Conditioning
Hot Water
WIFI Comfort Control
We've got you covered

Supply & Install

  • Heat pumps and air conditioning systems: both conventional and mini-split
  • Gas fired furnaces, boilers, and water heaters (tank and tankless)
  • In-floor hydronic radiant heating systems – including gas, electric, and air to water heat pumps
  • Heating systems into new construction and retro-fit – including duct work, radiant in-floor, house ventilation, kitchen range venting, and bathroom and dryer exhaust venting
  • Heat Recovery Ventilators (HRVs) and indoor air quality systems
  • Ultra Violet (UV) sanitizing
We Service:
  • All makes of heat pumps
  • Air conditioning systems up to 240,000 btu’s (20 tons)
  • Gas fired heating appliances and equipment up to
    780,000 btu’s (228 kW)


Rebates, Incentives and Savings:

We make rebates easy. 

  • Natural Gas Water Heater Rebates
  • Natural Gas Furnace Rebates
  • Natural Gas Fireplace Rebates
  • Space & Water Heating Rebates
We sell and service these great brands, and more.

Summer is here, stay cool and comfy. Get your AC repaired or replaced today!

"...highly recommend..."

I would highly recommend Nolan and his staff, they went above and beyond with getting us a new furnace and replacing all of our old ducting. We can now comfortably enjoy every area of our home without needing space heaters

Matthew Spurgeon
Google Review
"...very impressed..."

Sub Zero replaced our existing heat pump with a new variable speed unit and we are very impressed with how quiet it is especially in cooling mode. We have noticed a reduction in our Hydro costs since the installation. Nolan and his team did a great job

Robert Andersen
Google Review

Hear It From Our Clients

We set out at the start of every job we do to ensure that the work is done on time, with the right products, and that it’s done right the first time.