Ventilation Heat Loss

In larger structures (e. g., commercial or industrial buildings), venti­lation is necessary for both health and comfort. In houses, the

Amount of infiltrated air is generally sufficient to supply the ventila­tion requirements.

When ventilation is provided, the heating system warms the out­side air used for this purpose (i. e., ventilation) to the inside design temperature. The heat required will be equivalent to the heat lost by ventilation and can be calculated with the following formula:

H = 0.018 X Q(ti — to) where

H = heat loss by ventilation.

Q = volume of ventilation air.

0. 018 = specific heat of air (0.240) times density of outdoor air (approximately 0.075).

Posted in Audel HVAC Fundamentals Volume 1 Heating Systems, Furnaces, and Boilers