supply combustion air

[willd]

Where can I find filter units for wall installed combustion air supply. I am installing a boiler in a soon to be built building and need the contractor to frame for the filter units.

 

[spector]

Code in my area prohibits combustion air filters. Boilers eat a lot of air and filters foul quickly. So combustion air supply must be provided by properly sized louvered openings. The louvers may be screened but only with 1/4" or larger screening.

Check with your boiler inspector.

 

[ChrisConley]

Your applicable gas code is another place to check to ensure that your combustion air vents are the proper size, in addition to having the proper amount of free area through the louver. Just out of curiosity, what kind of fuel are you burning?