Heating, Air Conditioning, Fridge, HVAC/Strong Exhaust Odor in House

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ang wrote at 2010-10-14 04:21:06
Did you ever find out what it was? I have a similar situation, my house suddenly started smelling like exhaust, but I can't find a cause or reason, and it's only on the main floor and top floor, basement is not affected.  


concerned citizen wrote at 2012-12-31 05:29:47
If you smell vehicle exaust then you have a carbon monoxide problem, probably from incomplete combustion from your natural gas hot water. You always need a fresh air intake for combustion( ie.external fresh air pipe) and also an exaust pipe to direct carbon monoxide gas to the outside (from combustion)from natural gas or fireplaces, furnaces. These pipes need to have a short run (ie. 3 or 4 feet or less) to the outside and be at least 4 feet apart from each other.  Your instincts are right about the smell.  Your carbon monoxide detector would not go off until it has reached the level of carbon listed on the back of your detector(possibly 400 if yours is inexpensive like mine. Soon to be replaced with a better one).  Till then you'll experience burning smell irritating your nose, possibly throat, possible head aches, tiredness, heart palpitations, etc..If you have a natural gas company phone their emergency number and tell them you suspect a gas leak or incomplete combustion and they should come and detect any carbon monoxide fumes with their gauge.  Where i live this is a free residential service to natural gas customers out of safety for your family.  My furnace exaust was being trapped due to ice frozen in exaust gas pipe and i smelled the same thing you did. The gas company technician verified my suspicions and said the ice blocked the fumes from exiting my home.My co2 detector did not alert me but my nose did. The gas technician told me to get a better detector than the one i have.


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