<< Click to Display Table of Contents >> Navigation:  Calculations > Equations > Heat Gain Equations > Total Building Latent Heat Gain Due to Infiltration or Ventilation

QLi = 0.68 x ACF x CFMi x GrDiff

QLv = 0.68 x ACF x CFMv x GrDiff

Where:

 

 Qli        = Latent heat gain due to infiltration, Btuh
 Qlv        = Latent heat gain due to ventilation, Btuh
 CFMi        = Flow of infiltration air, CFM
 CFMv        = Flow of  ventilation air, CFM
 ACF        = Altitude correction factor from Table 10B, dimensionless
 GrDiff        = Grains of moisture difference between the outside and inside air
 0.68        = A constant, Btuh/CFM-Grain

 

Ref: Manual J 8 - Page 8-7