Got the plumber in today installing a gas fire and he says the air
brick is too small.
The fire's specifications says it needs 144 cm2 of ventilation.
I fitted a Screwfix single brick air brick which measures 22.9 cm x
I make that 148.85 cm2
The Screwfix book say's its freeflow is 6500 mm2 (yes mm2)
which would make it 65 cm2 which is a massive difference
How is the difference between physical area and free flow calculated ?
- Steve Lowe
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- posted 12 years ago