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2. Is Central Air Worth the Cost? Plus, What You Can Do Instead

   www.aol.com/central-air-worth-cost-plus...

   Some homes are able to keep naturally cooler than others, but many people consider installing central air conditioning to keep their homes tolerable. See Our List: 100 Most Influential Money Experts

3. How To Prep for Winter Energy Bills: 7 Affordable Home Upgrades

   www.aol.com/finance/prep-winter-energy-bills-7...

   Install a Smart Thermostat. Average cost: ... Forbes Home estimates the average cost to be between $1.50 to $5 per square foot. Some insulation types, such as batt/roll insulation can be as low as ...

4. Heating, ventilation, and air conditioning - Wikipedia

   en.wikipedia.org/wiki/Heating,_ventilation,_and...

   Central, "all-air" air-conditioning systems (or package systems) with a combined outdoor condenser/evaporator unit are often installed in North American residences, offices, and public buildings, but are difficult to retrofit (install in a building that was not designed to receive it) because of the bulky air ducts required. [32] (Minisplit ...

5. Seasonal energy efficiency ratio - Wikipedia

   en.wikipedia.org/wiki/Seasonal_energy_efficiency...

   Air-conditioner sizes are often given as "tons" of cooling, where 1 ton of cooling equals 12,000 BTU/h (3.5 kW). 1 ton of cooling equals the amount of power that needs to be applied continuously over a 24-hour period to melt 1 ton of ice. The annual cost of electric energy consumed by an air conditioner may be calculated as follows:

6. Evaporative cooler - Wikipedia

   en.wikipedia.org/wiki/Evaporative_cooler

   Less expensive to install and operate. Estimated cost for professional installation is about half or less that of central refrigerated air conditioning. [34] Estimated cost of operation is 1/8 that of refrigerated air conditioning. [35] No power spike when turned on due to lack of a compressor.

7. Air conditioning - Wikipedia

   en.wikipedia.org/wiki/Air_conditioning

   The efficiency of air conditioners is often rated by the seasonal energy efficiency ratio (SEER), which is defined by the Air Conditioning, Heating and Refrigeration Institute in its 2008 standard AHRI 210/240, Performance Rating of Unitary Air-Conditioning and Air-Source Heat Pump Equipment. [61]