carrier window air conditioner

As of Jan. 23, residential air conditioner manufacturers were no longer allowed to produce air conditioning units with a seasonal energy efficiency ratio SEER less than 13. By all accounts, the tougher standard is the biggest and most dramatic change the air conditioning industry has had to make since 1992, when efficiency requirements were raised from 8 to 10 SEER.

The new minimum standard is a 30 percent increase from the previous level and has raised the price tag of a minimum-efficiency system by about the same percentage. When 13-SEER units e the majority of sales, however, prices e down, predicts Andy Armstrong, director of marketing for York International.

The differences between a 10-SEER and a 13-SEER air conditioner boil down ponents that use less electricity. To meet the new requirement manufacturers added expansion valves to better regulate refrigerant flow, increased the coil surface area to speed the cooling process, and upgraded indoor air handler motors to manage air flow.

Systems with ratings higher than 13--ranging from 14 to 20.5--have been available for a few years and can cost anywhere from 40 percent to 100 percent more than an entry-level system. These higher ratings are achieved by highly ponents and the addition of two-stage or pressors, improved fan-blade designs that move air more efficiently, variable-speed blower motors that save energy as they remove more humidity from the air, and larger or multiple-coil surfaces.

A 13-SEER system is no longer the upgrade, and to qualify for the Department of Energys Energy Star label, an air conditioning system must have a SEER of 14. So custom builders--many of whom previously offered 13-SEER systems as a differentiator--will need to move up an efficiency level or more to maintain the benefit that they offer over the industry standard.

However, installing a higher-efficiency unit just for the sake of higher efficiency may not make sense in northern states where an air conditioning system does not have to run frequently, Armstrong points out. In low-cooling-demand areas, 13-SEER may provide adequate efficiencies, especially bined with zoning, indoor air quality pressor insulation, and variable-speed blowers to increase fort.

Where production builders will still focus on cost fort, according to manufacturers, custom builders should focus on installing air conditioning systems that will provide the best level fort in the home rather than the lowest cost--whether that can be achieved with a higher-efficiency unit or a 13-SEER unit. Carrier With a SEER rating of up to 18, the Infinity 18 air conditioner a pressor that operates on low speed 80 percent of the time for greater efficiency, The system is insulated to operate with sound ratings as low as 69 decibels.

The Infinity system allows homeowner to control temperature, humidity, air quality, fan speed, and ventilation and detects when the filter needs replacing. The Infinity 18 uses environmentally friendly Puron refrigerant.

800.227.7437. Circle 160.

Trane rue XL19i ultra-efficiency air conditioner has a SEER rating of up to 19.5. The unit features pressors--one to operate in milder weather, the other to run on extremely hot days, A variable-speed fan motor adjusts its speed to save energy and provide fort while operating pressor sound insulators also reduce operating noise, Woven spine fin cooling coils provide less resistance to airflow, increasing the efficiency of heat transfer.

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