Q: How does two-stage cooling work?

A: Two-stage cooling allows the air-conditioner’s compressor to run at high or low levels. High is the blast of cold air that you need on very hot days. Low works fine for milder days.

Q: What if my HVAC system doesn't work well in a couple of my rooms and they are too hot or too cold?

A: You may need an HVAC contractor to do an in-home evaluation with diagnostic equipment to understand the problem. Here are some questions to ask them:

• Is the heating and cooling system operating properly?

• Are the ducts well sealed?

• Are there areas of high humidity or moisture buildup?

• Is air being distributed throughout the house?

• Does the insulation in the home seem adequate?

Q: Should I have my HVAC system checked annually and what does an annual HVAC checkup involve?

A: It is a good idea to have your heating and cooling system checked annually. Ask your HVAC Contractor about a Preventative Maintenance Plan and its advantages. The following is a list of and HVAC system checkup:

• Check thermostat settings.

• Review electrical connections and measure voltage and current on motors.

• Lubricate all moving parts.

• Check and clean the drain.

• Make sure the system starts and shuts off properly.

• Clean air conditioning coils.

• Check and refresh refrigerant levels.

• Clean blower parts.

• Check all gas (or oil) connections.

• Clean or change air filters.

Q: How can I identify the reasons for high home energy costs and what can I do to lower operating costs?

A: HVAC contractors and your local utility company may offer home energy audits or they may be able to refer you to an independent consultant. There are some factors that you cannot control, like climate. But you can lower your costs by:

• Insulating your home.

• Keeping windows and doors to outside closed as much as possible.

• Look at use of appliances that may require your air conditioner to work harder to cool your home.

Q: Can my cooling costs be reduced in the summer with attic ventilation?

A: Heat can build up in your attic during the summer months, which increase your costs to cool your home. If the outside temperature is in the 90’s, the temperature in your attic can top 150 degrees. Moisture in your home can rise into the attic, and this moisture can collect and damage insulation and your home itself. Mold spores grow in wet areas, causing indoor air quality problems.

Q: What is a SEER rating on an air conditioner?

A: SEER stands for Seasonal Energy Efficiency Rating. The higher the rating, the more efficiently the air conditioner operates.

Q: Will I save money by updating my home thermostat?

A: A lot of people crank the dial, on their thermostat, up when they want more heat or drop it for a blast of cool air. This method wastes energy and money. A digital thermostat allows you to pre-set temperatures in your home for every day of the week to match your schedule. You avoid high-energy temperature swings as you enter and leave your home.