Joined on May 21, 2013
Last Post on May 21, 2013
@ May 21, 2013 9:01 PM in Natural Gas System sizing and expansion....I miscalculated the total BTU for the gas range cooktop, it is 44K, not 54K.
I just looked at the specs again and totaled up the various burners, there's one simmer at 5K, two regular burners at 9K, one power burner at 12K and a dual burner at 18K.
Sorry for the previous misinformation.
@ May 21, 2013 8:44 PM in Natural Gas System sizing and expansion....I live outside of Denver, Colorado at 5400 feet elevation. I would be doing the work myself. I have checked with the building department and they are fine with that. I have done plumbing work in the past, also installed my own pool heater (replacement) when I was living in CA.
I don't have schematics, but imagine a 5 x 10' boiler room in the basement, the furnace occupies 1/3 of the room almost, and then right next to it are two water heaters. The 1 1/2" has been run along the floor joists and pops down right next to the furnace, the 1/2" pipe going to the furnace has a run of no more than 3 feet, the other 1/2" pipe has a run of about 5 feet to the first water heater and then maybe another four feet to the second water heater. The cooking range goes into the kitchen right above the boiler room with a run of about 8-10 feet from where the 1/2" pipe leading to the water heaters terminates.
In any case, I was already dubious about my proposal, I was just wondering if it were possible since the furnace draws 110K and my 2 WH's plus range would only draw 134K (40+40+54). But I also know that distance skews the equations.
So my next question would be, what if I got rid of one of the water heaters. I already now leave one off anyhow (we bought the house with this setup, we are only 3 people and I don't see us needing more than the one 50gallon WH). I had been thinking that if we have company it would be nice to (almost) double our hot water capacity, but this is not a necessity. Just so the current setup is not a total waste I had been thinking about stripping the insulation from the first water heater in series and just use it as a pre-tank to bring the water temperature up to room temperature before it goes into the second water heater (in CO inlet cold temperature is about 40 degrees).
So if I remove/incapacitate the first water heater in the series and do not draw any BTU's (so only 40K draw on the line) and then run the 1/2" pipe another 10ft to my kitchen directly above for a total draw of 94K, would this be acceptable. The total run of 1/2" pipe from the 1 1/2" in this scenario would be about 15'.
@ May 21, 2013 6:08 PM in Natural Gas System sizing and expansion....This post adds to my original post:
The 1 1/2" line that runs all the way to my laundry room ALSO runs a gas fireplace. not sure what the BTU is on that, but it's some pretty feeble flames coming out of there.
@ May 21, 2013 5:57 PM in Natural Gas System sizing and expansion....Howdy,
I have an Elster Ac-250 meter, looks pretty new, so I gather this means that I have 250K BTU capacity with a 1" coming from the meter.
This 1" then leads to a larger sized pipe, looks at least 1 1/2" (not sure how to convert circumference to diameter). This larger pipe leads to the boiler room (maybe 25'-30' from meter)and tees off to two 1/2" pipes, one going to my Lennox Elite G61MPV (75K/110K 2 stage) furnace, the other to two WH hooked up in series (in series for water distribution) (40K BTU each). The 1/2" going to the WH's first goes to one, tees and connects and continues to the second (i.e. the gas line is hooked up in series also). The 1 1/2" also continues all the way to my laundry room and terminates in a 1/2" coonection, but is not hooked up to anything at present (maybe another 30' of 1 1/2" line).
I am proposing to add a 54K range (i.e. cooking surface) to the system in the kitchen which is directly above the boiler room, so maybe 10' at most. From what I can tell this should be fine with the current lines and gas meter that I have.
My question, however, is whether I can connect the range in series with the 1/2 line that the WH's currently use. The reason for this is space issues for the installation and the fact that the 1/2 for the WH's is right below and easily accessible. So tyhis 1/2" line would run the two WH's and the 54K range.
If I HAD to I can access the 1 1/2" line, but it's all very tight there and I might have to remove some ducting to get in there and do it up right.
Any and all help is greatly appreciated.