From the article regarding maintenance: - Clean or change the filters every one to three months - At least once a year clean the heat exchanger core. - In ad

From the article regarding maintenance: - Clean or change the filters every one to three months - At least once a year clean the heat exchanger core. - In addition to the core, the fans should be cleaned at least once a year. There is a home efficiency YouTuber that mentioned recently that his new home has 17 filters! There's always plenty of house maintenance to do anyway, this is just adding to it. I think Henry David Thoreau was onto something.