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HVAC systems are classified as either self-contained unit packages or as central systems. Unit package describes a single unit that converts a primary energy source (electricity or gas) and provides final heating and cooling to the space to be conditioned. Examples of self-contained unit packages are rooftop HVAC systems, air conditioning units for rooms, and air-to-air heat pumps. Central systems...
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For homes without ducts, air-source heat pumps are also available in a ductless version called a mini-split heat pump. In addition, a special type of air-source heat pump called a "reverse cycle chiller" generates hot and cold water rather than air, allowing it to be used with radiant floor heating systems in heating mode.
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A number of innovations are improving the performance of heat pumps. Unlike standard compressors that can only operate at full capacity, two-speed compressors allow heat pumps to operate close to the heating or cooling capacity needed at any particular outdoor temperature, saving energy by reducing on/off operation and compressor wear. Two-speed heat pumps also work well with zone control systems....
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Heat pump water heater systems typically have higher initial costs than conventional storage water heaters. However, they have lower operating costs, which can offset higher purchase and installation costs. The Pros and Cons of Heat Pump Water Heaters Are you considering getting heat pump water heaters for your residence? If your water heater needs repair or even a replacement, then you may have s...
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Many homeowners may overlook the importance of a good water heater and the surprisingly high price tag of having hot water. The average family spends $400 to $600 a year on the luxury of having hot showers and warm water. This price is partly because conventional water heaters are famously inefficient; they can account for up to 20 percent of your entire utility bill. That’s why many homeowners ar...
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HOW IT WORKS. A Wi-Fi thermostat has an IP address just like your computer does, but it also controls your home's heating and cooling like a standard programmable thermostat. The IP address allows a homeowner to connect the thermostat to their home's wireless internet and control it from a computer or smartphone.
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