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If you're considering a ductless split system installation, you probably have some questions. Using highly advanced technology, Mitsubishi Electric Cooling and Heating makes some of the best ductless air conditioning systems on the market. These innovative cooling devices are highly efficient by delivering a consistent, quiet flow of cool air to keep you comfortable and conserve energy. However, split systems must always be properly sized to accommodate the indoor spaces they are designed to cool. The primary advantage of Mitsubishi Electric ductless air conditioning systems is that you don't need the duct work required by a central air conditioner. Another benefit is that, unlike central air conditioning systems, ductless systems are much easier to install. Split systems consist of an outdoor unit and one or more indoor units (air handlers). The compressor and condenser coil are located in the outdoor unit, while the evaporator coil is situated in the indoor unit. A small hole of less than 3 inches in diameter is made in the wall to accommodate electrical wiring and copper tubing that connects the outdoor unit to the indoor unit.

The outdoor unit transfers refrigerant from the compressor and condenser coil via the tubing to the evaporator coil in the indoor unit. Cooled air is then blown indoors by a fan that's virtually silent. The sleek and inconspicuous indoor units can be mounted on the wall or ceiling. You can regulate the temperature of each indoor unit with a remote control or a wall-mounted thermostat. Multiple indoor units can be connected to the same outdoor unit. Each indoor unit can then be programmed to maintain a different temperature, thus creating separate cooling zones. This differs from central systems where the thermostat setting determines the temperature in every room. Proper ductless air conditioner sizing is essential for high efficiency performance and the level of cooling capacity. If the sizing is too small or too large, the system won't cool properly, and it won't operate efficiently. And if the system is improperly sized, if the indoor units are mounted in the wrong locations, or the installation itself is done incorrectly, you'll be left with an expensive problem to fix.

Systems that are incorrectly sized and improperly positioned can seriously interfere with humidity control and cost a bundle in high electric bills. Sizing a split system will depend on existing insulation levels, the area you want to cool and on how many indoor air handlers you plan to include. The more indoor units you want, the more precise the sizing must be. Because you're investing in a high performance system, technicians at Mitsubishi Electric Cooling and Heating recommend professional sizing and installation.
haier ac unit leaking waterThat way, you'll know the job will be done properly and that your investment will be protected.
fox ac repair austin tx Ductless splits cool a larger area at the same BTU level than do window air conditioners and portable air conditioners.
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Below is an approximate sizing guide: 350 square feet = 9,000 BTU 500 square feet = 12,000 BTU 750 square feet = 18,000 BTU 1000 square feet = 24,000 BTU 1250 square feet = 30,000 BTU 1500 square feet = 36,000 BTU The expert contractors at Mitsubishi Electric Cooling and Heating do not recommend installing a mini split system yourself. Although these systems are easier to install than central air conditioners, it's best to hire a licensed and insured contractor who employs NATE-Certified technicians. There are safety risks involved, and the installation process requires high-tech tools and specialized techniques. The installation must be performed in accordance with HVAC guidelines or it won't be covered under warranty. And although split systems come pre-charged, your technician may need to add more refrigerant to establish the correct charge. Mitsubishi Electric ductless systems have Seasonal Energy Efficiency Ratios (SEERs) of at least 13, while some inverter units boast SEERs of from 20 to 22.

The higher the SEER rating, the more efficient the system will be. For maximum efficiency, Mitsubishi Electric Heating and Cooling recommends installing an air handler in every room. However, one indoor unit can certainly cool multiple rooms if the BTU capacity of that unit is sufficient to cool the area of the corresponding space. There are two additional reasons why Mitsubishi Electric split systems are so efficient:Fishermen in the village of Maruata, which is located on the Mexican Pacific coast 18 degrees north of the equator, have no electricity. But for the past 16 years they have been able to store their fish on ice: Seven ice makers, powered by nothing but the scorching sun, churn out a half ton of ice every day. There's a global scramble to drive down emissions of carbon dioxide: the electricity to power just refrigerators in the U.S. contributes 102 million tons annually. Solar refrigeration can also be inexpensive and it would give the electric grid much-needed relief.

Electricity demand peaks on hot summer days—150 gigawatts more in summer than winter in the U.S. (A gigawatt equals on billion watts.) That's almost 1.5 times the generating capacity of all the coal-fired power plants west of the Mississippi River. Further, solar is plentiful. The solar energy hitting 54 square feet (five square meters) of land each year is the equivalent of all the electricity used by one American household, according to data from the National Renewable Energy Laboratory and Energy Information Administration, both part of the U.S. Department of Energy. Making cold out of hot is easier than one might think. A group of students last year at San Jose State University built a solar-powered ice maker with $100 worth of plumbing and a four-by-eight-foot (1.2-by-2.4-meter) sheet of reflecting steel. No moving parts, no electricity but give it a couple hours of sunshine and it can make a large bag of ice. The key is the energy exchanged when liquids turn to vapor and vice versa—the process that cools you when you sweat.

By far the most common approach, the one used by the refrigerator in your house, uses an electric motor to compress a refrigerant—say, Freon—turning it into liquid. When the pressure created by the compressor is released, the liquid evaporates, absorbing heat and lowering the temperature. Absorptive chillers like solar refrigerators use a heat source rather than a compressor to change the refrigerant from vapor to liquid. The two most common combinations are water mixed with either lithium bromide or ammonia. In each case, the refrigerating gas is absorbed until heat is applied, which raises the temperature and pressure. At higher pressure, the refrigerant condenses into liquid. Turning off the heat lowers the pressure, causing that liquid to evaporate back into a gas, thereby creating the cooling effect. As with most technologies, the efficiency of such absorptive refrigeration depends on the degree of engineering (and expense) brought to bear. Single-effect devices have a coefficient of performance of 0.6 to 0.7—that is, they create 60 to 70 Btus (British thermal units) of cooling for every 100 Btus of input heat.

That low level of efficiency can be achieved with something as crude as some pipe, a bucket of water, some calcium chloride (as absorbant), ammonia (as refrigerant), and a sheet of shiny metal (the solar collector). If what you want to do is heat or cool, using solar energy this way is probably more efficient—and certainly cheaper—than converting it first into electricity. "That approach ought to be comparable to photovoltaics, or a little better," said Tom Mancini, program manager for solar power at the Sandia National Laboratories in Albuquerque, N.M. It would take a fair-size collector—86 square feet (eight square meters), assuming 40 percent panel efficiency—just to deliver the cooling of a small (6,000 Btu per hour or half-ton) window air conditioner. And central air-conditioning units are often 30,000 Btu or more; few homeowners could spare the space for that.But concerns over collector area depend on location. In the developing world, solar powered ice makers allow locals to store the village's food or medicine without any electricity.

For example, in May charitable organization, Heifer International, set up three solar ice makers in remote areas of Kenya. Each will be able to keep 26.5 gallons (100 liters) of milk chilled. More than 500 members of two dairy cooperatives are expected to benefit directly. Most of the interest in such solar refrigeration in Western countries comes from the commercial, not residential, sectors. Cost is one reason—absorption chiller systems typically cost $7,000 to $10,000 per ton of cooling; one-ton window air conditioners from big box retailers start around $250—but companies can save on electric bill as well as enjoy a more benign environmental image. Building occupancy patterns is another; most Americans are not at home during the day. "We don't have as much daytime occupancy in residential buildings as in commercial," says Pat Hale, sales manager for Yazaki Energy Systems, in Plano, Tex. Other problems include the expense of retrofitting homes to add plumbing to the attic.