Vent it out the roof.
A quick question for all the pros - I am buiding a new house and am tring to figure out where I would like to vent my furnace exhaust. I am thinking hidden under my deck - but I understand you run the risk of an iced over deck. Are there any ways of venting under a deck and not having the freezing issue?
Vent it out the roof.
Karst means cave. So, I search for caves.
Furnace exhaust contains carbon monoxide. Why would you want to vent that anywhere other than the roof?
I think under the deck would be a bad idea due to possible lack of airflow. Also it might violate the distance from windows and doors in the intall instructions. I would just run it out the side wall.
Mine comes out the front of the house about ankle level under a bay window type thing where the area pushes out farther then the house. House is 5 years old. It was the first time I had ever seen that type of setup. There must be a blower to push it out just like on my water heater. First time I had ever seen one like that too.
new house i would go out the roof.
It's pretty common and quite acceptable to vent the exhaust from 90+ gas furnaces ( the modern efficient ones that vent through PVC pipe) out the side wall rather than the roof. This works out fine in practice, though there are some requirements about how close it can be to a window, door, snow line, etc. These rules are spelled out clearly in the install manual for the furnace.
Mike
well currently the exhaust is planed for above the basement door, but I really don't want it there I would like to hide it. I don't think the roof is an option as its a 2 story house, my builder tells me I can do it under the deck but it will have to go to the end of the deck or it will freeze the deck. any ideas on keeping it from freezing the desk.. as i really want it hidden.
I don't know about other places but its against code here to vent under a deck. Also some furnace manufactures will not allow it. You would have to run it insulated under the deck and out the end.
Why would you want to hide somthing so nice to look at anyways? LOL
Its a good Life!
2 story should not matter, most furnaces can run 40 feet or more of pvc vent pipe.
Karst means cave. So, I search for caves.
it should be able to be vented out the roof like has already been mentioned, as it will be a 2 or 3" pvc pipe (should be 2 pipes dont let them install only 1 if you can help it)
as far as above the basement door goes, well i would not put it there if there was any other option what so ever (assuming you mean right above it and not off to the side)
now under the deck, how high is the deck off the ground? how far below the deck will the vent be?
if your deck is 10' off the ground and you are venting out a foot below it it more then likely wont be an issue but if you are 2 or 3 feet off the ground your looking for trouble
i think this is a case of "the devil is in the details" so be more specific if you can and see what we can narrow down
Here is a link to the house plans
http://www.theplancollection.com/hou...home-plan-2437
the furnace is in the basment under the stairwell (basically in the center of the house)
The furnace installer drilled the holes where he wanted to run the intake and exhaust and its about 1' above the walk out doors - so if you walk in the doors you would see these to pipes sticking out and it would look like crap.
The deck is set to be about 20' long and on the end I would like the exhaust to exit it will be about 3-4' off the ground - with the retaining wall about 1-4' (depending on where he exits the house)
The furnace is a 5 ton unit - Reehm
I know nothing about HVAC but I would like all of this out of sight and was thinking of a couple of options
1)exit the exhaust under the deck - if freezing the deck floor is an issues either 45 or 90 the pipe toward the ground or put a sheild above it so it can't reach the deck floor
2)exit the exhaust under the deck and 45/90 it to above the retaining wall
The installer says he NEEDs to run the exhaust out the end of the deck so again I would have 2 pipes right in eyes view
I really like the idea of out the roof I will ask about that but for some reason they all think it needs to be out the basment - he keeps mentioning length of the run and bends
If you're just worried about appearance it can be painted to blend. I'd sure avoid under the deck, due to codes, liability, damage from moisture etc.
Question authority!
I have never seen manufacturers tech publication that will tell you its OK to vent under a deck. I can't speak to your local codes but I am almost positive it will be against them . You can go 90 plus and PVC out the side as long as it meets all other restrictions such as windows, doors, vents ect.
He's right about the length of run and number of elbows but totally wrong about coming out anywhere near a door. Depending on the furnace, the PVC length limit might be 40, 50, 60 feet. Each elbow is usually figured as 5 feet of straight pipe. There should be a chart in the instruction manual that will show maximum lengths of run for a given PVC pipe size.
If it were my house, I'd make a 2-pipe PVC run from the stairwell, straight across under the kitchen, through the band board into the left rear corner of the garage. Then I'd take insulated PVC up through the roof and behind the garage roof's ridge. Have the carpenters frame and insulate with bats around the PVC pipes and have it drywalled.
Good luck,
Gus
Ever thought of using a concentric kit? Turns a two pipe system into only one hole drilled into your house. Not to mention, about 100 times better looking than a two pipe termination.
This is fairly simple. Don't vent it anywhere where you don't want carbon monoxide, like around door or windows or anywhere you will be sharing the air with it. In the case you can't figure this one out, hopefully your HVAC guy can help you, if he is unable to do that, then hopefully code will dictate where it will go out. It doesn't matter what it looks like, if you're dead who cares whether you can see it or not. If you're using metal vent pipe, then you need to follow manufacturer guidelines for length either vertically or horizontally. Too high and your furnace won't start due to pressure switch, too horizontal and you'll rust your flue pipe out every few years from moisture buildup in flue, which you'll get carbon monoxide again. PVC on a 90+ furnace can go horizontal more, plastic doesn't rust and vertically you'll have problems with pressure switch if too long. If this is an issue, then go heat pump or hydronic. That gets rid of flue problem.
i was saying for most cases a 1 pipe install is not advised
2 pipes are almost (i cant think of any time they are not) alway better
as far as adding a concentric termination to a single pipe your just spending money on aesthetics, it will have no function
again if there is anyway possible get them to use 2 pipes