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Zoned HVAC energy and cost savingsMost US homes have an HVAC system controlled by just one thermostat - often not programmable, so the heating and cooling system heats or cools the whole house irrespective of needs. A single thermostat cannot properly or efficiently control the temperature in all parts of the home at all times of the day, week or season. Zoned Heating The advantages of heat zoning include: reduced running costs (especially if you have a large home), greatly reduced energy use, improved comfort levels, more rapid room heating, and extended heating system life. Homes can be divided into separate independent heating and cooling zones. In a two floor home a simple example of zoned heating is to separately control the heat to each floor. Second floor bedrooms generally only require heat in the evening and early morning, first floor living areas only generally require heat through the day and evening. The following chart shows the daily heating energy and cost savings achieved in a 4,000ft² modern Toledo, Ohio home by using zone heating,
reducing room temperatures and using local radiant electric heat. Read a
comparison of electric versus other heating sources.
Click for a larger image For more information relating to this chart reduce residential heating energy use. Manual Zoned Heating In a home that is heated by warm air the simplest form of heat zoning is to manually control the heat output registers, closing those in areas
where heat is not required and opening those in the areas where heat is required. Heat registers however do not fully close, a better option is
to cover the heat output registers with magnetic register covers, these are available at many home improvement stores.
Click for a larger image Automated Zoned Heating Zone heating and cooling can also be achieved by an automated system. This usually comprises of a number of programmable thermostats (one for each zone), an electronic control system, and a number of dampers fitted in the ducting. Dampers are available in a number of types, some can be easily fitted to existing ducts. An automatic zoned heating system is a type of heating system that allows the temperature in different areas (zones) of the house to be independently set and automatically controlled. Automatic Zoned heating example The 4,000 ft² Toledo OH home used for the research home was designed to be energy efficient and to have 4 separate heating/cooling zones, Energy and cost savings in a US home. The home has three programmable thermostats. Each
is connected to an Arzel Zone control which controls both the furnace and the air conditioning system. The Arzel Zone control monitors commands from
the three programmable thermostats and uses these to control the furnace and the many Ezyslide pneumatic dampers that are located in the ductwork to
control the airflow so it only flows to the areas that need heat.
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