HVAC companies use a blower door test to evaluate a home's airtightness and insulation.

With a few simple tricks, furnace energy efficiency can be improved and reduce costs.

Here are four furnace troubleshooting tips that can help homeowners fix some common heating problems themselves rather than calling a professional for furnace repair.

Most furnace problems result from improper maintenance, which can be easily avoided. That’s why regular furnace maintenance checkups should be done at least once a year.

There are several ways homeowners can ensure their HVAC system is in perfect condition.

How to quantify the quality of air filters.