Heating Helper

CHAPTER 7 - HEAT LOSS CALCULATIONSHORT FORM HEAT LOSS SURVEYApplication: Excellent when determining heat loss of a building as awhole. Precise method of sizing replacement hot water boilers.* Heating Multipliers (H.M.) BTU/Hr. Based on 60°F Temperature .Difference (T.D.)Wall H.M. Ceiling H.M. Floor H.M. Glass H.M. Infiltration H.M.No Insulation2 Inches4 Inches6 Inches156543"6"9"10"5432No InsulationOverhang 3"Overhang 6"Overhang 9"4532SingleSingle InsulatedStormDouble Insulated674134301-1/2 Air Change1 Air Chnages3/4 Air Change1.611.070.81PROCEDURE:1. Measure the length (L) and width (W) of the outside walls of the. .house and record. Calculate gross wall area by multiplying heightof the walls by total length of outside walls. (2L + 2W).2. Measure the window and door area and record.3. Record Net Wall Area = (gross wall area minus door and window. .area) select proper H.M.4. Measure and record the ceiling area and select H.M.5. Measure and record floor area and select H.M. (H.M. of 4 used. .unheated basement).6. Multiply floor area by ceiling height to obtain volume of home and. .select proper air change factor: 1.61 for Loose House - 1.07 for. .Average House - .81 for Tight House.H.M. Floor over Basement T.D. 20°WORKSHEET:.LENGTH WIDTH HEIGHTGROSS.WINDOWS & DOORS X =.NET WALL X =.CEILING X =.FLOOR X =.INFILTRATION (CU. FT.) X =.(HEIGHT) X (FLOOR AREA) .TOTAL HEAT LOSS =.TEMP. DIFFERENCE CORRECTION =*To Increase Temp. Difference to70°F, Multiply Total Heat Loss 1.1880°F, Multiply Total Heat Loss 1.3490°F, Multiply Total Heat Loss 1.50100°F, Multiply Total Heat Loss 1.66AREA (ft 2 ) H.M.(BTU/Hr.) BTU/Hr. Loss75