Area of a zone refers to the total square footage footprint of the zone. This data should be entered as square feet. A rectangular zone Area can be calculated as the length x width of the room. However, irregularly shaped zones (e.x. L shaped zones) need to have all the rectangles of the zone added together.

Area is used to determine:

1. Heat Gain of the Floor - This is the total space of the floor used to heat the zone.
2. Heat Loss of the Ceiling - This is the total space of the area above the zone which will figure into the heat loss of the zone.
3. Amount of material need to heat the room - We will use the area of the zone to estimate the amount of material the room will require; e.x. Tubing, electric mats, insulation, fastening hardware, etc.