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Front Duct Heat Loss 12" BTUH Adjustment for 55°1

Total Linear Feet of Ducting (12" Diameter / R6 Insulation3)

Ambient2 Temperature

20'

40'

60'

80'

100'

60°F

105 209 314 419 524

65°F

157 314 471 628 785

70°F

209 419 628 838 1047

75°F

262 524 785 1047 1309

80°F

314 628 942 1257 1571

85°F

367 733 1100 1466 1833

90°F

419 838 1257 1676 2094

95°F

471 942 1414 1885 2356

If you will be ducting the cold air supply and return air to and from a wine cellar, the "heat loss" through the ducting must be considered when sizing the cooling unit. This table calculates the heat loss given: 1) The ambient temperature where the ducting is located, 2) Total length of the ducting, assuming R6 insulation and wine cellar temperature at 55°F. When calculating the thermal load of your wine cellar in a front-ducted application, always consider the BTUH from the table above, and add it to the box load from our other tables.

(1) The table calculates the additional BTUH to be added to box load for the wine cellar, assuming R6 insulation on the ducting and 55°F temperature inside the cellar.

(2) Select the BTUH based on the ambient temperature in the area through which the ducting will be located.

(3) Select the BTUH based on the TOTAL linear feet of ducting (ie add the linear feet for both the supply and return air to/from the wine cellar. It is not necessary to add the linear feet, if any, from ducting the rear (ie hot air supply and return) of the cooling unit.