Venting 2 Mr. Heaters?

[kyounker]

Hey Guys,

I've been lurking here since last fall as I've been planning my garage addition. Here comes the first of my many questions for you all.

I'm expanding my 2 car, 24' x 24' single level into something bigger with an upper level workshop. I'd like to add a Mr. Heater upstairs, and plan for a 2nd Mr. Heater on the lower level sometime in the future.

I thought I'd be venting horizontally until I started reading the code and instructions. Now I'm thinking about vertical and using a common vent pipe.

I'm trying to understand if I can use the same common pipe for both, and is there a max vertical length. Basically can I come from the ground level through my "bonus" room upstairs, hook into the second heater, and then out the roof?

Also, if I'm not installing the lower level immediately, can I still run the vent to it's desired location and cap it off? Ideally, I'll have the two heaters in the same location on each of the levels.

Per the instructions: The unit may be vented vertically as a single appliance or as a common vent with other gas-fired appliances. In common venting situations, vent connectors for other appliances must maintain a 4” (100mm) vertical separation between the vent connectors. Refer to common venting tables in the (American) National Fuel Gas Code ANSI Z223.1 or (Canada) CSA B149.1 Natural Gas and Propane Installation Code for proper vent size.
Thanks for any advice,
Ken

 

[dave67fd]

Yes you can as long as it meets all the requirements of the code. You have to go look up all the required codes if you want to do it properly. Some of the codes are on line but tend to be tough to find as they wan't you to buy the code books but they can be found. Just like any code they can be difficult to interpert for your specific application.

Don't get discouraged. If your not in a hurry you'll find the info you need. If money isin't an object pay someone else to do it.

 

[Mmfh]

That seems like a similar setup as to what I did with mine. I have the heater and also a water heater going to the same vertical vent. Granted they are most likely closer together than what your heaters are going to be, but it seemed to be good from what I read, also its works great. My CO detector in the room with all this is not saying a thing.

I don't know the codes, but from initial thinking about it seems like it would be fine.

Good Luck, and Welcome to the GJ!

Mm

 

[kyounker]

Thanks guys...I've got a call in to the Inspector as well, to confirm.

 

[58Yeoman]

I interpret it as saying that you can have two exhausts close to each other at 'one' point. I don't think it means using the same vent for two different levels. If the lower stove was on, and the upper one wasn't, wouldn't the lower one try to vent through the upper one?