• Home
  • CellarPro Buying Guide: BTUH Adjustment for 12" Front Duct Kits

Duct Heat Loss: 12" Ducting Front

CellarPro Wine Cellar Buying Guide—Front Duct Heat Loss 12" BTUH Adjustment for 55°1

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

Ambient2 Temperature











105   209   314   419   524


157   314   471   628   785


209   419   628   838   1047


262   524   785   1047   1309


314   628   942   1257   1571


367   733   1100   1466   1833


419   838   1257   1676   2094


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.