mlarson
(Michael Larson, WI Lic. # 1672-106)
21
Outside air has been a requirement in homes with fuel burning appliances(clothes dryer, furnace, water heater) in my area for almost 40 years.
Is OK really that far behind the times?
jspencer
(Jeff Spencer)
22
Definitely a regional type of system. The difference in bin data between Iowa and Oklahoma is pretty substantial.
The only time that should be used is on a call for heat.