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[?]Hi. I've got a question. a found a cheapy heating system using an 82 gallon hot water heater as a source. nothing new there. but it also supplied domestic hot water to the house. I can't find any written advice to the contrary but my gut says this is not right. optinions appreciated. code is even better. thanks. dave from CT.

I recently inspected a 4 year old colonial with light yellow vinyl siding and with an oil-fired side vent boiler. the vent protruded about 6 inches. the siding below vent was white. siding nearby was a mix of yellow to white blotches. has anyone else seen this. can it be corrected? damage extends 20 feet away. vinyl was not distorted, so I don't think heat is an issue. could it be chemical?? I thought vinyl color was solid, not topical?? vent placement appeared correct. no vegetation to affect flow - just an open wall. any suggestions out there??