Hi Larry, I rarely recommend products, but a air cleaner that also filters down to at least .3 microns (submicronic particles), assisted by an UV light (Not UVA or UVB, but UVC at least, and UVV would
Hi Larry, Thanks for the follow up question! OK, another thing to find out is to know if there's a dead small animal in the duct system, or in the attic or crawlspace. That would have a strong odor
Hi Larry, Well the odor can come from a wide range of sources and may be from more than one. I need more info in order to provide you with the best overall solution. But, you can start by creating
I assume that the fuel is natural gas. If I'm wrong, let me know. Depending upon the type of boiler. The emission factors in AP 42- (here's the reference: http://www.epa.gov/ttn/chief/old/ap42/1st_edition/ap42_phs_1968
Here's the answer, though you may not be pleased about it. Everyone uses AP-42, the Air Pollution Emission Factors which is published by the EPA. The link for it is: http://www.epa.gov/ttn. From there

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