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  • Home Heating Pump: Determining the Heating Capacity

    Home Heating Pump

    There are many factors to consider when thinking about purchasing a new heating pump for heating and cooling the home. Because the system works by moving air from a warm area to a cool one like a refrigerator instead of generating the heat, the operating cost is approximately a quarter the cost of other heating and cooling systems. With the way the heat pump is built to operate in a highly efficient manner, it allows 4x the energy it uses. They’re an excellent choice for climates that don’t have sub-zero temperatures. A properly sized heating pump can trim electric usage by 30-40%. It’ll also dehumidify better than other types, resulting in less energy usage and cooler comfort during the summer. They do require larger duct work than other heating systems and should be sealed for efficient operation.

    Sizing of a heat pump unit should start by figuring the required cooling capacity, and then figure the heating capacity of the selected heat pump. It’s rated by a standard outside temperature of 47 degrees because the unit is placed outdoors and exposed to different temperatures. The design and size must meet the temperature levels of the locality of the pump placement. Heat loss must be factored in the equation for sizing capacity because the unit must produce enough heat to make up for the loss through windows, walls, and ceilings to keep the home comfortable during the winter months. As the temperature gets colder, a supplemental heating element takes the heating capacity back to where it maintains sufficient heat output for warmth comfort.

    Once the decision is made to purchase a heating pump heating and cooling system, the consumer should calculate the size necessary to heat and cool the home efficiently before contacting various companies for pricing. For example, a 2400 square foot home would need approximately a five ton system. A ton is equal to 12,000 BTU, and one ton is recommended for 500 square feet of heating. These are rough estimates only but proper sizing techniques are recommended. Knowing some basic facts will be an asset when talking to dealers.

    To assist in determining the right size, the most recent version of the ACCA Manuals J and S should be used for the calculations of the unit. There are built-in safety factors to accommodate most needs. When the window dressing is unknown, they should be factored in place or the calculation will be overestimated. The temperatures of the area shouldn’t be altered because it would lead to over-sizing. Many companies estimate up when figuring the calculation capacity of the unit because they believe more is better. The recommended temperature for cooling is 70 degrees and 75 degrees for heating. Right-sizing of a heat pump provides a 10% bonus energy savings.

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