top | item 40011434

(no title)

wenebego | 1 year ago

You didnt need to do that, though. It peobably wouldve been easier to use manual j (or some software) to estimate the heat loads in the house, with given set points, using weather station data.

discuss

order

sokoloff|1 year ago

I can find/closely estimate the heat loss easily. What is much harder to find is the heat gain/transfer into the room from 1920s cast iron radiators at 135°F flow and the balance of the system flow temperatures at those 45°F lower flow temps than originally designed.

Then, because the answer is almost always going to be "yeah, it's going to be really close...", I felt well-advised to prove it via experimentation rather than commit to changing the heating plant to a system that could not provide 150°F flow temperature.

rainbowzootsuit|1 year ago

If you are ok with IP units the formula is 500 * GPM * delta-T for water as the fluid.