bigfootnwildboy asked:
Have a gas, home heater and need to replace the filter. the filter is inserted vertically and I’m not sure whether the air flow is toward the heating unit or away from it. Thanks for your help.
Have a gas, home heater and need to replace the filter. the filter is inserted vertically and I’m not sure whether the air flow is toward the heating unit or away from it. Thanks for your help.