Air
conditioner works better by lowering the size of the job it has to do by
improving the building or reducing the internally generated loads that the air
conditioner must deal with.
Improving
the building “envelope” includes things such as increasing insulation levels or
shading windows or dimishing air leakage. These improvements reduce energy
spent on heating and cooling, but may need considerable time or investment. Putting
in a new roof or new windows is basically cost-effective when using
high-efficiency products. “Cool” roofing, for instance saves half a ton of
cooling and a lot of energy over the year.
Cutting
down of internal loads can be simpler. Shut off unnecessary electrical
appliances, lights and equipment. Use washers, dryers and other appliances to
cooler times of the day. Remove heat and humidity from kitchens and baths by
using local exhaust fan. Buying Energy Star or similarly efficiency
appliances helps likewise.
In
dry climates evaporative air conditions (swamp coolers) can provide considerable cooling.
In climates with large temperature swings, such as the hot, dry climates, reduce
the load by bringing in large amounts of cool outdoor air. (known as “night
cooling” “ventilative cooling” or “residential economizers”).
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