Published at Thursday, 31 January 2019. Kitchen Window and Ventilation Hood. By Osvald Henriksen.
So where does a powerful range-hood fan get its makeup air? If the house doesn’t have enough random air leaks around windows, doors, and mudsills, the makeup air is often pulled backwards through water-heater flues or down wood-burning chimneys — a phenomenon called backdrafting. Since the flue gases of some combustion appliances can include carbon monoxide, backdrafting is dangerous. In some cases, it can be life-threatening.
If your range hood cover itself is simply boring, make a statement with a stylish cover. If you’re a novice woodworker, but you want to spruce up your range hood, add corbels. This old French word simply means a fixture coming out from a wall to support a structure above it. In this instance, the corbels function strictly as a decorative accent piece since your hood cover is already mounted in place. You can buy pre-made corbels or you can handcraft and install your own design and mount them under your range hood cover.
Concerning the reference to NFPA standards, I tried to pin down what GE was hinting at. I contacted Allan Fraser, a senior building specialist with NFPA. After hearing me read the relevant paragraph from the GE instruction booklet, Fraser said, “That is a bad reference. As far as makeup air for range hoods is concerned, NFPA doesn’t cover it. Frankly, it is not an issue on our radar screen.”
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