Replacing your home's HVAC system may seem like a daunting task, but it's easy if you know what features to look for. We've compiled the ultimate "things to consider" checklist to help you take the plunge:

Some of your rooms are too hot or cold

Duct problems, inadequate air sealing or insulation could be the cause. No matter how efficient your heating and cooling system is, if your home is not properly sealed and insulated against air leakage, you will not be as comfortable and your system will have to work harder.

Your home has humidity problems and/or excessive dust

Poorly operating or improperly sized equipment could be to blame. Leaky ductwork can also cause these problems, so having it sealed may be a solution. Monthly maintenance of your heating and cooling equipment's filters may also help.

Your cooling system is noisy

Your duct system could be improperly sized or there may be a problem with the indoor coil of your cooling equipment.

Your equipment needs frequent repairs and your energy bills are going up

In addition to the rise in energy costs, the age and condition of your heating and cooling equipment may have caused it to become less efficient.

Your air conditioner or heat pump is more than 12 years old

Consider replacing it with newer, more efficient equipment. And, remember, high efficiency levels begin with ENERGY STAR.

Your furnace or boiler is more than 15 years old

Consider replacing it with ENERGY STAR^® qualified equipment. ENERGY STAR has set high efficiency guidelines for both types of heating systems.

You leave your thermostat set at one constant temperature

You could be missing a great energy-saving opportunity. A programmable thermostat adjusts your home's temperature at times when you're regularly away or sleeping. Source: "A Guide to Energy-Efficient Heating and Cooling," U.S. Environmental Protection Agency.