I used to work for a plumbing company and have done plenty, but crossing a bridge here trying to get a small cabin built in a picky county. We have adopted 2018 IRC but plumbing was specifically deleted and reverts to UPC code.
My plan... Cabin will use a direct vent 11k btu wall furnace, 40gal/32k btu tank water heater, and a single burner cooktop. I am running into a very tight situation with required combustion air per code.
My volume of this small 12x15x10 vaulted space will be 1935cf. But I guess "interior" space might be 1665cf. So when we look at available max btu natural vent capacity, that is either 38.7kbtu or 33.3kbtu input. I am trying to find the lowest btu input tank i can find and so far a 30gal/29kbtu. The single burner cook top is about 6500 btu. So that is 35.5kbtu. I can get a double burner unit and possible 'blank off' the second burner but.....we are getting into dumb land here.
When I look at the real mathematical side of this, I know exactly how much combustion air is needed but this just becomes a matter of getting it signed off. I will not have electric in this space so direct vent or tankless is out of the question to get it signed off, though that is probably what will happen down the road.
Questions.
1. Want to install a single 20lb (bbq cyl) directly on side of structure. Per IFC, this is not an issue, but I am not sure about the rubber hose/regulator for code? I can see them not liking that but I could also use a stainless flex line? Thoughts on mounts for this? They will want something firmly affixed.
2. I will run steel gas pipe in structure and not sure if that is required to be grounded these days? I would sure think so! Which code governs this? NEC? Because there is no other electric, a ground rod will have to be driven.
3. The water heater discussed will have to be in the bathroom as those appliances are not accepted in 'habitable rooms'. I am curious if UPC governs any applicable vent grills in the walls to provide makeup air?
4. The cooktop will technically be in a habitable room because the bedroom and kitchen are all the same space. Remember we are talking small. Do you guys see issues? The plans review guy has zero issue but he is also not the one that inspects these and I don't want post build drama.
My plan... Cabin will use a direct vent 11k btu wall furnace, 40gal/32k btu tank water heater, and a single burner cooktop. I am running into a very tight situation with required combustion air per code.
My volume of this small 12x15x10 vaulted space will be 1935cf. But I guess "interior" space might be 1665cf. So when we look at available max btu natural vent capacity, that is either 38.7kbtu or 33.3kbtu input. I am trying to find the lowest btu input tank i can find and so far a 30gal/29kbtu. The single burner cook top is about 6500 btu. So that is 35.5kbtu. I can get a double burner unit and possible 'blank off' the second burner but.....we are getting into dumb land here.
When I look at the real mathematical side of this, I know exactly how much combustion air is needed but this just becomes a matter of getting it signed off. I will not have electric in this space so direct vent or tankless is out of the question to get it signed off, though that is probably what will happen down the road.
Questions.
1. Want to install a single 20lb (bbq cyl) directly on side of structure. Per IFC, this is not an issue, but I am not sure about the rubber hose/regulator for code? I can see them not liking that but I could also use a stainless flex line? Thoughts on mounts for this? They will want something firmly affixed.
2. I will run steel gas pipe in structure and not sure if that is required to be grounded these days? I would sure think so! Which code governs this? NEC? Because there is no other electric, a ground rod will have to be driven.
3. The water heater discussed will have to be in the bathroom as those appliances are not accepted in 'habitable rooms'. I am curious if UPC governs any applicable vent grills in the walls to provide makeup air?
4. The cooktop will technically be in a habitable room because the bedroom and kitchen are all the same space. Remember we are talking small. Do you guys see issues? The plans review guy has zero issue but he is also not the one that inspects these and I don't want post build drama.