What Temperature Should I Set My Air Conditioner to in Winter?

Canadian homeowners face a number of typical challenges when it comes to maintaining wintertime indoor comfort. 

It might seem unusual to use your air conditioning system during the colder months, but understanding what temperature to set an air conditioner to in winter can help optimize energy use, maintain indoor air quality, and keep your HVAC system running efficiently. 

Read this guide from High Point Plumbing, the leader in AC services in Kimberley, BC, and around the region to learn best practices for winter air conditioning, temperature settings, and tips to balance comfort with energy efficiency.

Can You Use an Air Conditioner in Winter?

Certain functions of your HVAC system — like fan-only or dry modes — can be very useful even when you don’t need cooling. Appropriate settings improve air circulation and reduce indoor humidity, preventing issues like condensation or mold growth.

We also want to point out that It’s important to ensure that you use your air conditioner sparingly in extremely cold weather. Overuse can strain the compressor and lead to unnecessary wear and tear that could shorten your system’s lifespan. 

With rising energy costs, even small adjustments can result in noticeable energy savings while supporting indoor comfort. 

What Temperature To Set an Air Conditioner to in Winter

The ideal thermostat setting in winter varies based on outdoor weather conditions and the specific mode of your HVAC system. During winter, you must balance comfort, energy savings, and the functionality of your air conditioning unit to reach an optimal temperature.

Dehumidification or Fan-Only Mode

In these modes, the air conditioner helps preserve a comfortable indoor environment while removing excess moisture and promoting air circulation. Set your air conditioner between 20°C and 22°C (68°F to 72°F).

The temperature range is best for energy savings in this situation. It prevents your system from working too hard, especially in milder winter weather when cooling isn’t necessary.

Nighttime Settings

Many people prefer a cooler environment for sleeping. 

In this case, lowering the thermostat to 18°C to 20°C (64°F to 68°F) creates a restful atmosphere many people prefer for better sleep. Additionally, it reduces energy usage during sleeping hours, so your system will not heat up your entire living space while you are in bed.

Unoccupied Hours

When no one is home, save energy by lowering the temperature by a few degrees. Reducing the setting to about 18°C (64°F) during these hours can lead to significant energy savings. You’ll protect your plumbing, pets, and inside living space. 

Especially if you use a smart thermostat system that you can control remotely, you can quickly bring your indoor temperature up to a more comfortable level. 

Tips for Maximizing Energy Efficiency in Winter

There are some other things to consider in addition to what temperature to set an air conditioner to in winter.

First, let’s look at a couple of common misconceptions about wintertime air conditioning. 

While some may argue that cooling system use in winter wastes energy, when used strategically, the system improves air circulation and moderates humidity. 

Also, beware of warnings that lower temperatures always mean better energy savings. Setting your thermostat too low can easily overwork your HVAC system and negate any savings. 

Here are some additional tips for Kimberley, BC, property owners to save money in winter while remaining comfortable at home:  

• Prevent heat loss by sealing leaks. Avoid rapid heat loss with weatherstripping or caulking to seal window and door gaps.
• Upgrade your home insulation. Proper insulation reduces the workload on your HVAC system by retaining heat.
• Use a programmable thermostat. Set different temperature schedules for daytime, nighttime, and when you are away to maximize energy efficiency.
• Switch to “auto” mode. Make sure your system’s fan runs only when you need heating or cooling to conserve energy.
• Schedule regular HVAC maintenance. Schedule seasonal professional tune-ups and inspections to maintain optimal performance and regularly check and replace HVAC system air filters.