The forced-air heating and cooling systems that keep our homes comfortable year-round require very little maintenance. In most cases, all you must do to keep the equipment operating at peak efficiency ...

All filters get in the way; that’s what they’re supposed to do. But some offer reasonable pollutant and dust screening for only a small loss of air flow, while filters at the extremes of high and low ...

Running your furnace, central air, or heat pump probably constitutes a big part of your utility bill. But it’s a small, often inexpensive part—the air filter—that keeps these heating and cooling ...