NOW is the time to replace your air filter. You might need heat in the evening, a clean filter is a good idea. With the COVID-19 pandemic, more people have been inside their homes playing with pets and your air system maybe trying to filter way more than it used to. Check that filter! Replace i! It's probably at capacity with the number of people and pets living inside for these last few months. If we need to come out and check anything - please give us a call at Mountain States Heat Air by calling below: