HOME > SAN DIEGO AIR CONDITIONING REPAIR AND SERVICE

When you need repair or service on your Air Conditioning system, we can arrive to your house, office or business any time that it is convenient for you. Call us 24/7 at our toll free number:

800-434-7282

If you like to set up an appointment online please specify your name, address and a brief nature of the problem and send it to appointment@SanDiegoApplianceRepair.net Once we receive your request we will contact you immediately to confirm your appointment.

We work on all the AC brands including:

A fan should change the air in the house every 2 minutes. To get the right size, calculate the volume of all rooms to be cooled multiply height x width x length of each room and add the totals; divide the total by 2 to obtain the design airflow rate in cubic feet per minute (CFM). Select a fan that provides the design airflow rate at Vio inch static pressure, a measurement that represents the amount of push or pull produced by a fan. Check that the attic vents (pp. 460-46 1) have at least 1 square foot of free area for every 750 CFM of airflow; add more if there isn't.
Always open at least one exterior door or window before operating a whole-house fan. For best results, open windows and doors of rooms that are in use. Most whole-house fans have 12-hour timers and speed control switches; some have thermostats too. In the winter, cover the fan opening with an insulated panel.

Air conditioners cool, dehumidify, and filter the air. They can be bought to condition a single room or the whole house
Energy ratings. The energy used by air conditioners is measured in British thermal units (Btu's): 1 Btu is the amount of energy it takes to heat 1 pound of water by 1 degree F you can also think of a Btu as approximately the amount of energy released by completely burning a kitchen match. Air conditioners are sold by the ton, an industrial term that represents the amount of energy it takes to melt 1 ton of ice in a day, which is equivalent to 12,000 Btu's per hour. For example, a 3-ton air conditioner has a capacity of 3 x 12,000, or a total of 36,000 Btu's per hour.
An air conditioners capacity is the sum of two factors: sensible heat and latent heat. Sensible heat is the energy that is removed from air to cool it Latent heat is the energy that is removed from water vapor to condense it. In humid climates latent heat requirements are higher—as much as 30 percent of the total load.

Sizing. Accurate sizing is critical. An undersize unit does not maintain comfort during the hottest days. An oversize unit wastes energy and cycles on and off excessively, causing inefficient operation and a shortened life for the equipment. In addition, an oversize unit does not dehumidify properly, leaving the air feeling cold and clammy.
Most air-conditioning loads vary from I V2 to 12-/3 tons per 1,000 square feet of living space, but you can't rely on this rule of thumb. Ask the dealer to do the sizing calculations; or if you are buying a room air conditioner, make your own calculation and check it against one of the dealer's charts. Air-conditioning loads are calculated by measuring the area of exterior windows, walls, and ceilings, and multiplying each by a factor that quantifies heat gain. The calculation must also take into account the local climate, the number of south-facing windows, the desired indoor temperature, and the heat generated by people, lights, and appliances. (For more information on sizing a central system,
A central air-conditioning system circulates cool air throughout the house with a network of ducts. Typically, these same ducts are used for heating in the winter. An outside condenser unit contains ns a compressor, condenser coil, and fan. Indoors, an evaporator coil is installed on the supply duct of the warm-air furnace. Refrigerant tubes connect the evaporator coil to the outdoor condenser unit. When the thermostat calls for cooling, the compressor switches on and circulates refrigerant through both coils. The furnace blower forces indoor air through the evaporator coil, where it is cooled, dehumidified, and then circulated throughout the house. Heat taken from the indoor airstreams is transferred to the condenser coil, and then to the outdoor air.

Cost-effectiveness. When adding a cooling system to a home that already has warm-air heating, central air conditioning is often less expensive than equipping every room with an air conditioner. However, if your home has some other type of heating system, you will have to add ductwork. Sometimes ducts can be installed economically in a crawl space or a basement. But where walls and ceilings must be opened, the cost of ducts may be so high that installing individual room units turns out to be the less expensive alternative. Room air conditioners can actually be more energy-efficient because you can operate them only in rooms in use, cooling each one to the temperature you want. But a central air-conditioning system is quieter because the noisiest component, the compressor, is located outside. And unlike room units, central systems do not protrude through walls or windows.

Determining system size. Central air conditioners usually range from I'A to 12/3 tons for every 1,000 square feet of living area. Hot humid climates require larger units, whereas cool dry climates may utilize smaller ones. Accurate sizing is critical. An oversize unit will cycle excessively, causing inefficient operation, shortened compressor life, and inadequate dehumidification. Ask your air-conditioner dealer to do the sizing calculations.

Selecting the most economical unit
Central air conditioners are labeled with a SEER (Seasonal Energy Efficiency Ratio) number. The I higher the SEER number, the more efficient the unit. Although 10.0 are suitable for most locations in the United States, you may want to check if a unit with a higher efficiency rating is worth the added expense. You can do this by comparing the unit's price plus installation costs with the money you can save in energy costs. Start by getting bids for installing a central air conditioner from at least two contractors, in addition to prices, ask the contractors what size units they propose to install and their SEER numbers. Then use the following formula to calculate the annual operating cost for each unit: Capacity x Cooling load hours x Electric rate SEER 1,000
Capacity is the nominal number of Btu's of energy the unit extracts from the indoor air. To get the capacity of a unit, multiply the air conditioners tonnage by 12,000. Cooling load hours are indicated on the map below. You may need to check with your local utility to get the electric rate in dollars per kilowatt hour ($/kWh). And so, if you want to find the annual operating cost for a 10.0 SEER, 3-ton air conditioner in a location with 1,400 annual cooling hours and a .08 $/kwh electric rate, calculate it as follows:
36,000 Btu's x 1,400 hours x .08 $/kWh = $403.20 10.0 1,000
When comparing two units, divide the difference in purchase price by the difference in annual operating costs to get the payback period. This tells you how many years it will take for the energy savings to add up to the additional cost for the higher-priced, more efficient unit. Generally a payback period of 3 to 8 years, or less, is considered a worthwhile investment.

The components of a room air conditioner are contained in a compact box that can be mounted in a window or through a wall. Individual units are usually less expensive to install in an existing home than a central system. Because a room air conditioner cools only the room in use, it may also be more energy-efficient. A small to medium-size unit can be installed by a homeowner.
Every air conditioner contains two coils, which are composed of panels of aluminum fins and loops of copper tubing. A compressor circulates refrigerant through both of the coils. One fan draws room air across the evaporator coil, where the air is cooled and dehumidified. Another fan blows outdoor air over the condenser coil, where the heat absorbed from the indoor air is ejected. A barrier with a door separates indoor air from outdoor air. To permit ventilating the room with outside air, the door may be opened.
Room air conditioners are labeled with an Energy Efficiency Ratio (EER), calculated by dividing the capacity of the unit, in Btu's per hour, by the number of watts of electrical energy needed to run it. Select room units with an EER of 9 or higher.

After reading the text the problem cannot be resolved, we strongly suggest that you call us for an appointment at.

800-434-7282

Also you can set up an appointment online please specify your name, address and a brief nature of the problem and send it to appointment@SanDiegoApplianceRepair.net Once we receive your request we will contact you immediately to confirm your appointment.