A variable speed furnace blower can matter almost as much as the furnace stage itself. ECM blower motors move air gently, use far less electricity than older fixed-speed motors, and keep air flowing through your filter more often. During Calgary's closed-window winter months, that means less dust, better filtration and more even comfort from room to room. Learn how a variable speed furnace pairs with humidifiers and air purifiers to improve your home's indoor air quality this winter.