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Gas Load Calculations

Gas Load Calculations

Gas Load Calculations

(OP)
Is there a quick and easy way to do a rough calculation for Gas Load on a building?  I am looking to figure out a rough BTU/sf for a building in Conneticut.  I want to include a rough calculation for heating the makeup outdoor air as well (say from 10 deg to 70 deg?).  This is just a quick estimate and doesn't need to be as in depth as using Trane Trace or anything.   

RE: Gas Load Calculations

Total wall area / R value of walls = Q walls
Total roof area / R value of roof = Q roof
Total window area / R value of window = Q window
Ventilation = 1.08 CFM DeltaT
Add 100MBH for domestic hot water

Add them all together, throw in a safety factor (15-25%) and you should have a rough peak gas load.

If you have more time, there are a lot of free, simple heat loss calculators online. Slantfin has one www.slantfin.com.

 

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