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1
General Outdoor Furnace Discussion / Re: How to properly stack wood in a conventional boiler?
« on: January 08, 2016, 05:55:10 PM »
What I do in my ncb 175 is to throw a large round on the coals that I raked to the middle then add to the outside stacking triangle shaped to the top middle. I have an '08', so have to make sure grates are all the way back and a piece of angle to fill gap in front. Clean air gaps with a rake, stir coals and repeat.
2
Plumbing / Re: Gpm= BTU
« on: October 17, 2015, 07:00:27 AM »
Thanks for all the info everyone. Just a rough estimate on head, ordered 200' of pex, may have cut off a few feet here or there, I think 6 pex 90s, 1 male and 1 female pex adapter, 2 pex ball valves and a thirty plate exchanger. Didn't know head loss on fittings so just a rough estimate.
3
Plumbing / Re: Gpm= BTU
« on: October 14, 2015, 03:59:41 AM »
I think I understand now. Use the rough gpm number with the HL number to determine the pump and then the HL number gives you the actual gpm. Also I was using the wrong grundfos pump chart ( different beginning letters). The chart was for single speed not 3 speed.
4
Plumbing / Re: Gpm= BTU
« on: October 13, 2015, 07:29:43 PM »
Yes, everything existing. Just trying to figure out the gpm. Has a little trouble keeping up when really cold. Will just have to run it into a bucket and time it to get a close estimate.
5
Plumbing / Re: Gpm= BTU
« on: October 13, 2015, 06:45:59 PM »
Heating 3200 sqft plus uninsulated basement/ crawl space that's open to house. Half the house is early 1900 not the greatest insulation and other half newer and decent insulation and just OK on windows( double pane Anderson but not a fan). Just going by 200,000 gas boiler that was hereon btu requirements.
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Plumbing / Re: Gpm= BTU
« on: October 13, 2015, 05:42:24 PM »
Yes that's what I used but it shows 1" pex at 7.5 gpm at 4 ft/sec, but not sure where 4 ft/sec comes from. And that only equals about 75,000 btu which is no where near enough to heat my house but it does. Also it doesn't give pex fitting length equivalent, so I rough estimated based on copper.
7
Just having a hard time with calculations on flow rate of my system. I have a grundfos 26-99 pump with what I calculate as 28' of head with 1" pex and a dt of 20°. Should be around 7 gpm but that should only be 70,000 btu. Should need 200,000 for the house. I must be missing something, maybe the ft/sec is more than 4. How do you determine that? Or is the w/w plate exchanger where I'm gaining?
8
Plumbing / Re: Pipe size versus flow
« on: October 09, 2015, 09:28:00 AM »
Been running a few years with it. Didn't know all this knowledge was here at everyone's disposal before I installed everything. I bought the boiler used with plate exchanger and put 1" five wrap pipe in myself not knowing what I've learned from everyone. Just trying to improve. Don't think it would be cost effective to remove 200' of 1" and replace with 1 1/4. Thought maybe 50 plate would be a more economical improvement. Does more plates equal less resistance?
9
General Outdoor Furnace Discussion / Re: Flushing plate exchanger
« on: October 08, 2015, 06:49:00 PM »
Thanks for the pic sceptre. Are the tees with the bushing for temp guage?
10
Plumbing / Pipe size versus flow
« on: October 08, 2015, 06:36:57 PM »
I'm doing the calculations on my system using charts off a link previously provided on this site. I have approx. 425' of 1" pex pipe and fittings on a comparable grundfos 26-99 pump through a 30 plate exchanger. Was considering going to 50 plate but now seeing that may need to go to 1 1/4 pipe also. Looking to get more heat transfer but chart says 1" pex a only gets 7 gpm flow. Will a 50 plate change the transfer if only getting 7 gpm?
11
General Outdoor Furnace Discussion / Re: Happy New Year!
« on: December 31, 2014, 03:50:03 PM »
Thanks to all the knowledgeable people that offer all their expertise on this site. Hope that everyone has a warm and prosperous new year.
12
Natures Comfort / Re: NCB 175 door gasket
« on: December 19, 2014, 06:37:34 PM »
Unfortunately it's an '08'.
13
Natures Comfort / Re: NCB 175 door gasket
« on: December 10, 2014, 05:35:22 PM »
Bought it at a local wood stove supply store. Box that it was cut from said 1" and it measures 1". Old stuff easily measures 1 1/4 across and measures about 4" around
14
Natures Comfort / Re: NCB 175 door gasket
« on: December 09, 2014, 07:29:20 PM »
I tried with the 1" but the door doesn't come close to sealing with the adjustment all the way bottomed out. And the old is noticeably bigger.
15
Natures Comfort / NCB 175 door gasket
« on: December 08, 2014, 07:10:16 PM »
I have a '08' 175 and was going to replace door gasket with 1" rope but the old seams to be 1 1/4". Has anyone run into this? Do they make/sell 1 1/4" silicone infused rope gasket?