DIY Chatroom Home Improvement Forum

DIY Chatroom Home Improvement Forum (
-   HVAC (
-   -   Boiler room/air make up question (

joeg679 11-15-2009 11:05 AM

Boiler room/air make up question
Hello, I'm new here, but I've been reading a lot of the posts and I see that there are a lot of knowledgeable people here so I thought I would see if someone could help me. I have a finished basement with a bar (that I am turning into an office) attached and a boiler room attached to that. I installed an exhaust fan into the the office to get rid of the stale air and I removed the louvered door leading to the boiler room because I would something more soundproof, I also have a fireplace in the basement. The boiler room is not directly connected to the main room with the fireplace and, but it shares a wall. I was wondering if I installed 2 12x12 inch vents (one high and one low) would that be sufficient to bring the air into the boiler room, since I replaced the louvered door? I currently have a vent in the main room that is about 20x12 that pulls air from the room into the furnace, the air then goes through a filter system and gets pumped throughout the house. Is that all I need for the make up air or do I still need the vents into the room? In the past, I have smoked a cigar in the main room and the whole house has smelled. I would like to be able to smoke in the office. I am installing french doors to close the room off to the main room, so smoke will not escape and get pulled through the system from the main room. I have also replaced the louvered door so the boiler room doesn't pull the smoke out. Sorry for the long post and thanks for any help you can give me.

beenthere 11-15-2009 02:29 PM

The current grille, is a return air grille, not a combustion air intake.
So your cigar smoke will circ through the house still.

Weather 2-12X12 grilles for combustion air is enough. Depends on teh BTU size of the boiler, what size is it.

joeg679 11-16-2009 12:14 AM

I believe that the furnace is 125,000 BTU's, but not sure. If that sounds right, then that is what t is. The cigar room would be sealed off totally and the new grates would be installed in the main room, so unless there is cigar smoke in there, the it would not circulate throughout the house, right? THanks for your help.

beenthere 11-16-2009 04:44 AM

If the cigar room is sealed off totally. Then how will you breath.
How will you get heat into the room.

If you only put supplies to the cigar room. Then when the heat is on. That room becomes a positive pressure room. And the cigar smoke/odor is still forced out of the room.
You should get carbon/charcoal filters for the returns for that room.

125,000 BTUs input requires 6,250 cubic foot of free volume. If less then that. Then it requires combustion air intakes.

Can you make and post a pic of your current, and intended layout.

All times are GMT -5. The time now is 04:42 PM.

vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.

Search Engine Friendly URLs by vBSEO 3.6.1