Profile: Apple Heating & Cooling is a provider of heating and air conditioning products & services. Our products & services include CO detectors, generators, heat pumps, gas furnaces, gas boilers, electric furnaces, air conditioning, humidifiers, duct cleaning, programmable thermostat, and whole house air exchangers. We can add zoning to most duct and forced air systems. We install a control panel and dampers in the ductwork. Our zone systems can be installed in homes and offices in one to two days. Duct systems are similar to the arteries and veins in our bodies. They are intended to deliver conditioned air to the space where it is needed, and to return the air from the space back to the equipment. Pleated filters use a pleated paper media that captures a much greater amount of the airborne particles that it encounters. The Aprilaire 5000 whole house air cleaner combines the electronic air cleaner with the media air cleaner. This unit has the high efficiency of the electronic air filter with the performance of the media air cleaner. These filters are installed in the return air ductwork, usually just before the equipment.