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Front Duct Heat Loss 6" BTUH Adjustment for 55°1

Total Linear Feet of Ducting (6" Diameter / R6 Insulation3)

Ambient2 Temperature

10'

20'

30'

40'

50'

60°F

26 52 79 105 131

65°F

39 79 118 157 196

70°F

52 105 157 209 262

75°F

65 131 196 262 327

80°F

79 157 236 314 393

85°F

92 183 275 367 458

90°F

105 209 314 419 524

95°F

118 236 353 471 589

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.