It's one of the most common things we hear as homeowners -- for efficient, longer-lasting heating, ventilation and air conditioning (HVAC) systems, it's crucial to replace our air filters once every three months.One thing we're never told, however, is why. Sure, clean air filters can improve a home's indoor air quality and make an HVAC system run more efficiently, but it's easy to forgo these benefits for the sake of reducing the time and … [Read more...]