Free Web Tool · ASHRAE CLTD

HVAC Cooling Load

Estimate sensible cooling load using ASHRAE CLTD/SCL/CLF — separate roof, walls, glass conduction, glass solar, lights, people, and equipment, plus latent from occupants.

Input

Results

Q roof
Q wall
Q glass cond.
Q glass solar
Q lights
Q people sens.
Q equipment
TOTAL sensible (W)
TOTAL sensible (kW)
Q people latent
TOTAL incl. latent (kW)
Method

Q = U·A·CLTD for opaque surfaces. Q_glass_solar = A · SC · SHGF · SCL. Q_lights = W · CLF_l · 3.41 → ÷3.412 to W (here we use W direct: Q = W · CLF_l). Q_people = n · (q_sens · CLF + q_lat). Q_equip = W · CLF.