Showing posts with label air conditioner maintenance. Show all posts
Showing posts with label air conditioner maintenance. Show all posts
Wednesday, February 3, 2010
Quick Guide to HVAC Efficiency Ratings
When purchasing a furnace, heat pump or air conditioner, ALWAYS ask about its Efficiency Ratings. They will tell you will tell you how efficiently your heating and cooling equipment uses fuel (gas, oil or electricity). These ratings and standards are determined by the Environmental Protection Agency and other government and industry authorities, and all new heating and cooling sold today must meet certain efficiency rating minimums.The most-frequently used efficiency ratings are:
- SEER (Seasonal Energy Efficiency Ratio): This ratio tells you the amount of cooling your system will deliver per dollar spent on electricity The SEER rating of any unit can range anywhere from 13 to 17. The higher the SEER the more efficient the system will be and the less it will cost in the long run to own and operate.
- HSPF (Heating Seasonal Performance Factor): Similar to SEER,it is a measurement of efficiency of the heating portion of a heat pump. HSPF ratings range from 6.8 to 10; high-efficiency units have efficiencies of 7.5 HSPF or above.
- AFUE (Annual Fuel Utilization Efficiency ratio): A measurement of the percent of heat produced by a furnace for every dollar of fuel consumed. The higher the AFUE rating, the lower the fuel costs. All furnaces manufactured today must meet at least 78%. Older furnaces (10 – 15 years or older) may fall below this minimum. Furnaces with AFUE ratings from 78% to 80% are considered mid-efficiency; ones with AFUE ratings above 90% are considered high-efficiency.
- MERV (Minimum Efficiency Reporting Value): Not a former talk show host. MERV is a filter rating system relating to the size of the holes in the filter that allow air to pass through. The higher the MERV rating, the smaller the holes and the higher the efficiency in capturing contaminants. MERV rating range from a low of 1 to a high of 16.
- ENERGY STAR: An Environmental Protection Agency designation attached to HVAC products that meet or exceed guidelines for high-efficiency performance above the standard government minimums.
Look For The Label
When shopping for new HVAC equipment or any electrical appliance, look for the EnergyGuide label, which should come with the equipment's paperwork or be posted on the appliance at retail stores. The EnergyGuide will help you compare the energy use and efficiency of a particular model relative to other available models with the appropriate ratings listed above.
The federal government requires manufacturers to affix the label to the following products:
- Furnaces
- Boilers
- Central air conditioners
- Room air conditioners
- Heat pumps
- Water heaters
- Pool heaters
- Refrigerators and Freezers
- Dishwashers
- Clothes Washers and Dryers
ENERGY STAR-qualified models will have the ENERGY STAR mark on the label or somewhere on the appliance.
More About Efficiency Ratings...
Monday, December 21, 2009
A Checklist for Maintaining Your Home's Heating and Cooling Systems
Properly maintaining your home’s heating and cooling systems can improve energy efficiency, reduce your utility bills, and prevent the need for costly repairs. The best time to check your systems is in the spring and fall, before a heating and air conditioning contractors’ busy summer and winter seasons.You can do many general maintenance checks yourself and then report potential problems to a trusted heating and air conditioning professional. It’s also a good idea to hire a professional to do a thorough inspection once or twice a year. A typical checklist should include:
- Reviewing your thermostat settings to make sure the temperature inside your home makes things comfortable when you’re there and saves energy when you’re not.
- Tightening electrical connections to make sure your appliances are running safely and to prolong the life of system components.
- Lubricating moving parts to reduce damaging friction and strain on your home’s electrical supply.
- Inspecting condensation drains if your home has central air, a furnace or a heat pump. Blocked drains can lead to water damage and mold infestation.
- Checking system controls to make sure everything is working properly. Be sure systems start, run and shut down as they should.
- Cleaning and changing air filters on your furnace, air conditioner and heat pump regularly. Dirty filters increase utility costs and can damage equipment. Most filter manufacturers have recommended replacement schedules clearly printed on product packaging.
- Clean the evaporator mechanism and condenser coils. Dirty coils will restrict the air conditioner’s effectiveness in cooling your home, making the system work overtime to compensate. This will cost you more on your utilities and can significantly shorten the life of your system.
- Check refrigerant levels and adjust fluids as necessary. The wrong amount of refrigerant chemicals circulating through a system can cause irreparable damage and will increase your energy usage.
- Have blower components cleaned and adjusted if needed. This ensures that the proper amount of air is flowing through the system at all times, which makes for more comfortable temperatures. Airflow restriction can decrease your energy efficiency by as much as 15 percent.
- Check all connections, especially if your heat is supplied by oil or natural gas. Loose or malfunctioning connections create a fire hazard and can lead to serious health risks like carbon monoxide poisoning.
- Make sure pilot burners and heat exchangers are functioning properly. Dirty, damaged or malfunctioning burners and exchangers can impede the operation of your system and may cause heating quipment to run less safely and less efficiently.
More Info About Heating and Air Conditioning Maintenance...
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