gas furnace/water heater room ventilation


  #1  
Old 06-19-10, 05:39 PM
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gas furnace/water heater room ventilation

My furnace & water heater are in a room apprx 8 X 12. regular dyrwall construction w/ interior door. (i think gravity fed hood furnace....???BTU's)

I've been told i should a install louver door or cut a hole in the drywall and install a metal louver vent to allow furnace to breath easier and avoid carbon dioxide build-up.

For 6 yrs the room has remained unchanged w/ a cabon dioxide detector in the room and its never gone off. I'm doing some work in the basement and feel if I should install a vent i should do it now.

does this sound like something i need to do??

thanks
 
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Old 06-20-10, 11:02 AM
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Fuel needs air (specifically oxygen) to burn and if the fuel does not get enough air the products of combustion can be hazardous to health. From what you have described I would most definitely add venting/ductwork to the outside air to this room. The specifics are readily obtainable and they are based upon the total BTU rating of the gas-burning appliances. I can probably find some guidelines for you if needed.
 
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Old 06-20-10, 03:30 PM
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thanks.....i will add a vent
 
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Old 06-20-10, 04:30 PM
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I strongly urge you to read pages eight and nine of the linked pdf file.

http://www.dnmech.com/lit/io-554.pdf

Also read this link.

FIELD CONTROLS, LLC - CONTRACTOR PRODUCTS Combustion Air Systems
 
  #5  
Old 06-21-10, 12:21 PM
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Code state a air intake equal to 1" square per 1000 input. ie: 100k input would need a 10 x 10 register installed.
Also most codes require 2 vents installed, one near the floor and one near the ceiling.
 
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Old 11-27-14, 07:00 AM
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What if the heating appliance is high efficiency gas that uses exterior supplied intake and exhaust? Same guidelines apply?
 
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Old 11-27-14, 07:56 AM
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If the furnace uses outside air for combustion, you only need to be concerned with any other appliances (water heater, dryer, etc.) which may share combustion air from within the room.
 
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Old 11-28-14, 06:28 AM
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Thanks Grady! Nothing else but electric water heater in the space.
 
 

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