Ottawa’s winters are no joke. With temperatures regularly dipping to -20°C and much lower, homeowners naturally wonder whether a heat pump can really handle the cold.
The short answer is that modern cold climate heat pumps are designed to deliver reliable heat pump performance at -20°C. The more complete answer is that for Ottawa winters, a dual fuel system often provides the best balance of efficiency, cost savings, and reliability. Here’s why.
Do Heat Pumps Work in Extreme Cold?
Today’s cold climate heat pumps are far more advanced than older systems. Thanks to inverter driven compressors and improved cold weather technology, many modern heat pumps can:
- Operate efficiently down to -20°C
- Continue producing heat at temperatures as low as -25°C or even colder
- Maintain steady indoor comfort without frequent cycling
This makes heat pumps a strong option for a large portion of Ottawa’s heating season, particularly during fall, spring, and milder winter days.
What Happens Below -20°C?
As outdoor temperatures drop, all air source heat pumps experience reduced efficiency. At extreme cold temperatures:
- The system works harder to extract heat from the outdoor air
- Electrical consumption increases
- Heating capacity may no longer meet the full demand of the home
This does not mean the heat pump stops working. It simply means it is no longer the most efficient or cost effective way to heat your home during deep cold snaps.
Why Dual Fuel Systems Make Sense in Ottawa
A dual fuel system combines a cold climate heat pump with a high efficiency gas furnace. The system automatically selects the most efficient heat source based on outdoor temperature and operating cost.
How a Dual Fuel System Operates
- During mild and moderate winter temperatures, the heat pump provides efficient and affordable heating
- During extreme cold, typically below -20°C, the gas furnace takes over and delivers reliable high output heat
Key Advantages of Dual Fuel Heating
- Lower overall heating costs throughout the winter
- Reliable comfort during Ottawa’s coldest days
- Built in backup heating for added peace of mind
- Reduced strain on the heat pump during extreme conditions
This approach allows homeowners to take full advantage of heat pump efficiency without compromising reliability.
Is a Heat Pump Worth It in Ottawa?
Yes, especially when installed as part of a properly designed system. For many Ottawa homeowners, a dual fuel setup:
- Maximizes seasonal energy savings
- Uses the most efficient heat source for current weather conditions
- Provides dependable heating during prolonged cold spells
Rather than choosing between a heat pump and a furnace, dual fuel systems allow both technologies to work together.
Final Thoughts
Cold climate heat pumps are capable of operating at -20°C and below. However, Ottawa’s winter climate demands more than just cold weather capability. A dual fuel system offers the best combination of efficiency, comfort, and reliability for long term performance.
Choosing the right heating solution is not just about equipment. It is about designing a system that matches Ottawa’s climate and your home’s needs.
Looking for reliable heat pump performance this winter?
Team Harding is here to help. Contact us today to get started.
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Team Harding has been Ottawa’s leading home comfort specialist since 1994. We are a family-owned and operated local business and all of our installers and technicians are fully licensed.
