International Association of Certified Home Inspectors
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| HVAC Topics include heating, venting, and air conditioning. |
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#1
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I inspected a room with 100,000 BTU natural gas furnace and 36,000 BTU hot water tank in a 6X6X8 room. No exterior ventilation for combustion air. Door to room was trimmed at bottom allowing house air to enter for combustion air. I am going to recommend an exterior vent added for combustion air. My question is: There is currently an exterior vent with ducting into the return air plenum. Should I recommend the return air plenum be sealed from exterior vent and exterior vent be allowed to add air into small utility room for combustion air? Thank you.
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#2
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Freedom Express Inspections LLC CMOR Thermography Certified Level 11 #2097 freedomexpressinspections.com freedomexpress495@att.net NACHI Member Okla. State DEQ Environmental Phase One Certified Master HVAC Mechanic (Retired) Certified Universal Freon by 40CFR 82 Sub-part F Professional Home Inspector State License # 130 Reporting system by Home Inspector Pro Serving the State of Okla. |
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#3
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I agree with Charley, recommend that the lack of adequate combustion air be corrected by a Pro in the field. Hard to believe the original local inspector missed this during the installation process.
You may be dealing with a replacement installation, where the contractor took it upon himself to make some changes. We see that a lot in my area of the country. |
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