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Do I have the right main vent?
Noticed that my main vent was cracked and steam was coming out the side so I went to replace the current Durst A883 3/4" which lasted only 2years, with a new one.
Went to supply house and was given a Vent-rite #57 3/4" and I installed it right away with no problem to warm the house back up. In reading the box, I became concerned that I may have the wrong vent because on the box chart the #57 is for Unit Heaters with operating pressure of 20 PSI.
The chart lists other models for main vents (#35, #75, #77) with operating pressure from 3.5 to 5 psi and I am questioning whether I have the correct size main vent.
Is this 20 PSI too much for a main vent?