Is this enough combustion air

[Buck Hartley, CMI]

Is this enough combustion air for a water heater and furnace?

Thanks! for your input.

[David P. Valley]

Absolutely not.

Write it up.

At a minimum....a louvered door is recommended.

[Buck Hartley, CMI]

Thanks! David,

I did just that. Funny thing it was built that way 11 years ago.

[Gary Oleski]

Combustion air calculating.
http://www.achrnews.com/CDA/Articles...00000000239415

[James F. McKee]

sure it is if you don't want to light the hot water tank or use the furnace...now if you want to use either of those things you need to remove that door or provide a louver door as the minimum acceptable amount of ventilation...imho....jim

[Larry D. Kage]

Originally Posted by bhartley

Is this enough combustion air for a water heater and furnace?

Thanks! for your input.

This will help:

http://www.houseofcraig.net/combustion_air_calc.html

[Greg Veal]

It would appear to be an inadequate C/A design.

Knowing the capacities of the Furnace & Water Heater will help in sizing of the openings, but just as important is the location of the openings.

You should always have adequate openings in a high & low design, preferably opposite walls or corners.

IMO

[Joe Funderburk, CMI]

Was it direct vent by chance? If so, it get's its air from outdoors.

[Richard Mangold]

I don't see how anyone can answer the question from the picture without knowing the type of furnace and water heater (source of combustion air), the total BTUs for them, and the cube of the room behind the door. What if that room leads to a large utility room? Let's not assume it is just a closet.

[dbolduc]

The question was if this sole supply of air is enough for the mentioned applications and it isn't. The question did not refer to any other source of air supply.

[David P. Valley]

Originally Posted by bhartley

Thanks! David,

I did just that. Funny thing it was built that way 11 years ago.

Buck,

Are those mechanicals (in that closet) high efficiency?

[Mark A. Timpani, CMI]

maybe they are electric

[Richard Mangold]

Even if combustion air is from the vent on the wall, then combustion air will also come from the room/closet . You can not assume by only seeing a door that the room or closet is not large enough to support the furnace and water heater. There was no mention of a closet or room in the initial question. Can anyone tell what is behind a closed door by seeing a door? I don't think it is wise to assume things when inspecting.

[Michael Larson]

Originally Posted by rmangold

Even if combustion air is from the vent on the wall, then combustion air will also come from the room/closet . You can not assume by only seeing a door that the room or closet is not large enough to support the furnace and water heater. There was no mention of a closet or room in the initial question. Can anyone tell what is behind a closed door by seeing a door? I don't think it is wise to assume things when inspecting.

Well said.

We simply were not given enough information to make any reasonable determination.

[Buck Hartley, CMI]

There were not high efficiency or electric. I could not found another source of combustion air. Homeowner had recently finished the basement.