Transforming indoor spaces, one degree at a time

Duncan’s Leading Heating
& Air Conditioning Company

We sell, install, and service quality HVAC systems and make sure your air conditioning and heating systems are running at their absolute best. Whether you need HVAC maintenance, upgrades to your existing system, or repairs, we’re ready and able to serve you.

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

Keeping Your Units Running Smoothly and Your Spaces Comfy.

From Trouble-Shooting to Problem Solving, Fast & Effecient.

Request a Quote Today
Sub Zero Heating & Cooling


Residential & Light Commercial Installations

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

Our experience and reputation make us the easy choice. We have helped hundreds of Duncan area residentsCall 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 heater
    (tank and tankless)
  • In-floor hydronic radiant heating systems
    including gas, electric and “air to water” heat pump
  • Heating systems into new construction & retro-fit including duct work, radiant in-floor, house ventilation, kitchen range venting, bathroom & dryer exhaust venting
  • Heat Recovery Ventilators (HRV’s) and indoor air quality systems
  • Ultra Violet 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 Rebate
  • Space & Water Heating Rebates
We sell and service these great brands, and more.

Summer is just around the corner. 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.