Frequently Asked HVAC Questions

Frequently Asked HVAC Questions

Air Filters:

Q. How often should I change my furnace filter?
A. Furnace and Air Conditioner filters need to be changed every two months that the HVAC system is in operation. A clean filter will lengthen the life of your HVAC equipment, and lower the dust in your home.

Q. What type of filter should I use?
A. If you are going to use disposable air filters, use cloth pleated, extended furnace filters with a MERV rating between 7 – 11. If you are looking for a higher grade filtration system, consider an CleanEffects Clean Air System system.

Air Conditioning:

Q. What is SEER rating?
A. SEER stands for Seasonal Energy Efficiency Ration.  In technical terms, SEER is a measure of equipment the total cooling of a central air conditioner or heat pump (in Btu) during the normal cooling season as compared to the total electric energy input (in watt-hours) consumed during the same period. SEER Ratings are most commonly used to measure the efficiency of a central air conditioner. The higher the SEER, the more efficient the system. SEER measures how efficiently a cooling system will operate over an entire season.

Q. What is the Energy Efficiency Ratio (EER)?
A. In technical terms, EER is the steady-state rate of heat energy removal (i.e. cooling capacity) by the product measured in Btuh divided by the steady-state rate of energy input to the product measured in watts. This ratio is expressed in Btuh/watt. Energy Efficiency Ratio (EER) is a measure of how efficiently a cooling system will operate when the outdoor temperature is at a specific level (95oF). The higher the EER, the more efficient the system.


Q. What is AFUE?
A. Annual Fuel Utilization Efficiency. AFUE is a rating that reflects how efficiently a gas furnace converts fuel to energy. An AFUE of 90 means that approximately 90 percent of the fuel is utilized to provide warmth to your home, while the remaining 10 percent escapes as exhaust.

Q. What is BTU?
A. British Thermal Unit. In scientific terms, it represents the amount of energy required to raise one pound of water one degree Fahrenheit. One BTU is the equivalent of the heat given off by a single wooden kitchen match. For your home, it represents the measure of heat given off when fuel is burned for heating, or the measure of heat extracted from your home for cooling.


Q. When Should I Schedule HVAC Maintenance?
A. Proper maintenance by a qualified HVAC technician is one of the most important steps you can take to prevent future problems. Contractors get busy during summer and winter months, so it is best to check the cooling system in spring and the heating system in the fall. Plan the checkups around the beginning and end of daylight-saving time each spring and fall.