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Most molds are harmless, or are at most an allergen. There are a fairly small number which are toxic to one degree or another. So a lot of the fear you see is overreaction, or is folks with serious allergies. If you aren't allergic, and don't have reason to suspect that this is one of the nasty ones, it's mostly an eyesore. The real problem is that, once ...


Unless your hot water heater is positively vented (i.e. an exhaust blower), you need a draft hood in order to prevent back pressure in the vent line. If you connect directly to the hot water heater without a draft hood, you are risking having the pilot light blown out by pressure in the vent (think wind) or letting exhaust gases escape into your house. It's ...

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