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Room Heater Sizing Guide
HOW TO CHOOSE THE CORRECT SUNSTAR CORCHO HEATER FOR YOUR ROOM 

For Zone I-IV. For Zone V, see below.
1. Determine cu. ft. volume for the room to be heated
(length x width x height of the room = cu. ft.)
2. Find your heating zone on the map above.
3. Multiply the cubic volume by the heating factor located
on the adjacent chart.

EXAMPLE 1: You would like to provide supplemental heat for a room located in Chicago, Illinois. The room is 20' long, 15' wide and 8' high. The cu. ft. of the room is 20' x 15' x 8' = 2400 cu. ft. Then locate Chicago on the heating zone map (Zone IV). Heat required = Heating Factor x Cu. Ft.
7.5 x 2400 = 18,000 BTU/HR.

EXAMPLE 2: You would like to provide supplemental heat for the same size room located in Dallas, Texas (Zone II). Heat required = Heating Factor x Cu. Ft.
4.8 x 2400 = 11,520 BTU/HR.

 


HOW TO CHOOSE THE CORRECT SUNSTAR CORCHO ROOM HEATERS (ZONE V)

Notes:

  1. These charts are intended to be used as a guide only and the section for Zone I-IV is based on providing enough BTU's to heat a room in that particular zone even during a power outage. The section for Zone V is per the sizing guidelines published by the Vent-Free Gas Products Alliance.
  2. Actual heat loss may vary according to insulation values and exposed window and/or door areas.
  3. BTU's needed (for Zones I-IV) may be reduced by 15% for well insulated rooms or homes constructed after 1980.
  4. When calculating room size please include any space that adjoins the room to be heated if there is no door between the two areas.