In the United States, three-quarters of all households have air conditioners. Air conditioners use about 6 percent of all electricity produced in the United States, at an annual expense to homeowners of about $29 billion. As a result, per year, approximately 117 million metric tonnes of carbon dioxide are released into the air.
While air conditioning may be your first thought for cooling, there are several alternatives that have less energy consumption for cooling. A combination of adequate insulation, energy-efficient windows and doors, daylighting, shading, and ventilation can typically keep homes in all but the hottest climates cool with a minimum of energy usage. While ventilation can be avoided in hot , humid climates, the need to use air conditioning can be greatly reduced by other approaches. You may want to familiarise yourself with the concepts of heating and cooling before choosing a cooling system.
The same operating principles and basic elements are employed by air conditioners as your home refrigerator. An air conditioner cools your home with a cold indoor coil called the evaporator. Similarly, an air conditioner uses energy to transfer heat to the comparatively warm outside world from the interior of your house.
Room air conditioners and central air conditioners are the two most prevalent types of air conditioners. Ductless, mini-split air conditioners offer a balance between the two types of systems. For particular details relating to these air conditioners, see the following:
Centralized air conditioners
Mini-split air conditioners ductless
Air Conditioners in Room
When purchasing an air conditioner, features to look for include:
- For high performance operation when the weather is at its hottest, a thermal expansion valve and a high-temperature rating (EER) greater than 11.6
- For modern ventilation systems, a variable speed air handler.
- A device which is quietly running.
- A fan-only switch, so you can use the nighttime ventilation unit to greatly minimise the cost of air conditioning.
- A filter inspection light to remind you to inspect the filter after a predetermined number of hours of service.
- An automatic delay fan switch switches the fan off a few minutes after the compressor is turned off.
Central Air Conditioners
Either a split-system unit or a bundled unit is a central air conditioner.
An outdoor metal cabinet contains the condenser and the compressor in a split-system central air conditioner, and an indoor cabinet contains the evaporator. This indoor cabinet often comprises a furnace or the indoor portion of a heat pump for several split-system air conditioners. In the cabinet or main supply duct of this furnace or heat pump, the air conditioner’s evaporator coil is mounted. A split-system is the most affordable central air conditioner to build if your home already has a furnace but no air conditioner.
Via a series of supply and return ducts, central air conditioners pump cool air. Cooled air is transported from the air conditioner to the home by supply ducts and registers.
To generate the same amount of cooling as air conditioners made in the mid 1970s, today’s best air conditioners use 30 percent to 50 percent less energy. Even if your air conditioner is just 10 years old, by replacing it with a newer, more powerful model, you can save 20 percent to 40 percent of your cooling energy costs.
Home Cooling Systems
Evaporating water into the air in low-humidity areas offers a natural and energy-efficient way of cooling. Evaporative coolers, also known as swamp coolers, rely on this concept, by passing it over water-saturated pads, cooling outdoor air, allowing the water to evaporate into it. The 15 ° to 40 ° F cooler air is then guided into the house, and through windows pushes warmer air out.
Windows are opened part way to allow warm indoor air to escape while using an evaporative cooler as it is replaced by cooled air. Evaporative coolers bring a steady stream of fresh air into the home, unlike central air conditioning systems that recirculate the same air.
It costs about one-half as much to install evaporative coolers as central air conditioners and uses about one-quarter as much electricity. They need more regular maintenance than refrigerated air conditioners, however, and they are only ideal for low humidity areas.
There are two ways in which evaporative coolers are installed: the cooler blasts air into a central position, or the cooler attaches to the ductwork, which distributes the air to various rooms. For compact houses that are accessible from room to room, central-location installations work well. For larger houses with hallways and multiple bedrooms, ducted systems are needed.
At least two speeds and a vent-only option should be given for an evaporative cooler. The water pump does not work and the outdoor air is not humidified during the vent-only service. This lets you use the evaporative cooler during warm weather as a whole-house fan.
Save yourself a great deal of work and cash by regularly draining and cleaning your evaporative cooler. The sediment and mineral build-up should be frequently removed. Every season, coolers need a big cleaning and will need regular maintenance multiple times during the cooling season.
Tips on Cooling
When you purchase new cooling equipment, pick energy-efficient items. To help you compare energy use, your contractor should be able to send you energy fact sheets for various forms, models, and designs. For specifics on minimum scores, see the Performance Criteria and search for an ENERGY STAR when buying new goods.
Set your programmable thermostat as high in the summer as it is convenient, and while you are sleeping or away from home, increase the set point.
Once a month or as recommended, clean or install filter on air conditioners.
Switch off the kitchen, bath, and other exhaust fans within 20 minutes after cooking or bathing is done; consider installing high-efficiency, low-noise models when replacing exhaust fans.
Keep the window coverings closed during the day during summer to block the rays of the sun.
Switching to high-efficiency air conditioners and taking other steps to keep your home cool could minimise the use of energy by 20 % to 50 percent for air conditioning.
When your air conditioner is properly installed, or if major installation issues are
detected and repaired, it will perform successfully with only minimal routine maintenance for years.
Many air conditioners are not correctly mounted, however.
If your unit is installed poorly, a modern energy-efficient air conditioners can work just as poorly as older, inefficient models, as an unfortunate consequence.
Be sure to hire a licensed contractor to install your air conditioner. Cheaper prices are not always the right way to go and low prices are often too good to be true. Your best to hire a reputable Air Conditioning installation company.
Avoid contractors who do a mediocre job, like slapping on a broken bone with a band-aid. For now, it may succeed, but the work won’t last and in the near future it will cost you more!
If they quote you a low upfront price, it’s highly possible that you will hit will incurring costs and a hefty completion bill.
Distance yourself from and an installer who carries no worker’s compensation or liability insurance.