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power vent proving times

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Robert_H
Robert_H Member Posts: 320
in Oil Heating

Is there a general standard for power vent proving time?

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  • 109A_5
    109A_5 Member Posts: 4,068
    image.png image.png

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    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System

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