Heat Pump Units
New Heat Pumps for Residential & Light Commercial Use
When you need reliable, affordable climate control systems, your first choice for information should be the heat pump experts at Metro Express Service. One of the best investments you can make today is a heat pump, with its unbeatable energy efficiency and environmentally friendly design. Air-source heat pumps pull heat from the air outdoors and bring it into the home during the winter and shift indoor air outside during the summer. A geothermal heat pump extracts indoor heat during the summer and draws heat from the ground (ground source) into the home in the winter.
Learn the Basics About Heat Pumps
Heat pump units contain a refrigeration system consisting of a compressor and two coils of copper tubing, surrounded by aluminum fins that aid in the transfer of heat. These coils closely resemble the radiator in a car. Just as in refrigerators and air conditioners, refrigerant flows through these pipes to and from outdoor coils. When the heat pump is in heating mode, heat gathers in the outside coils and is drawn inside, where the refrigerant evaporates into gas. As it condenses back into a liquid, indoor coils transfer heat into the air. A reversing valve near the compressor changes the direction of refrigerant flow to cool during the summer or defrost outdoor coils in winter.
Choose the Best Heat Pump Unit for Your Needs
Air Source Heat Pumps
Air source heat pumps provide efficient heating and cooling in warm climates, such as Texas. When installed properly, an air source heat pump delivers 1½ to 3 times more heat energy to a home compared with the amount of electrical energy they consume. This is because heat pumps move heat rather than converting it from fuel.
Absorption Heat Pumps
Essentially air-source heat pumps, absorption heat pumps are driven by a heat source such as natural gas, propane, and solar, or geothermal heated water, rather than electricity. Absorption coolers work on the same principle, but are not reversible and cant be used as a heat source.
Ground Source Heat Pumps
Instead of using outdoor air, geothermal heat pumps transfer heat to and from shallow ground, using the earth as a source of heating or cooling. This takes advantage of the moderate temperature in shallow ground, giving the system a huge boost in energy efficiency and greatly reducing operational costs.
Exchanging heat with the ground is very efficient because underground temperatures remain stable throughout the year, despite climate changes. Like caves, shallow ground is warmer than above ground air in the winter, and cooler than above ground air in the summer.
Compounds used in heating cycles that undergo phase changes from gas to liquid and back are known as refrigerants. In the phase change, the refrigerant either gives off heat or absorbs it, depending on the stage in the cycle. The main use of these chemicals are for refrigerators and freezers, as well as air conditioners.
Originally, widely used refrigerants were discovered to cause ozone depletion (in the 1980s), but these chemicals have been phased out and replaced with more environmentally friendly refrigerants.