Direct Fire Makeup Air units and temp rise
Hi and thanks for looking!
I have run into some confusion regarding make up air temp rise. When a unit data tag or documentation lists a given temp rise at "design temp" (not posted), should I presume they mean my regional winter design temp such as manual j temp? Also, more importantly, is the listed temp rise linear to the outdoor air temp?
Example: If the maximum listed temp rise is 100 deg f at 29 deg f (max discharge would equal 129) would the max temp rise at 0 degrees be 100F ?
If not is there a way to calculate what my temp rise should be at a given outdoor air temp?
Assume a constant volume system and single speed fan...
Thanks for your inputs!