An outdoor temperature, usually between 30° and 45° Fahrenheit, at which a heat pump’s output equals the exact heating needs of the home or business. Below the balance point, supplementary electric resistance heat must maintain indoor comfort.
An air-handling device for moving air in a distribution system.
The standard of measurement used for the amount of heat required to raise the temperature of one pound of water by one degree (Fahrenheit). BTUH = the number of BTUs per hour.