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[Durzz]

First time posting so I hope this is in the right place.

I have been looking at a OWB for a little over a year now.

If I do buy one I would want to look into running my business heat as well with it.

Business sits right at 600ft from my home.

Is this too far for under ground pluming?

Will I have too much heat loss?

[johnybcold]

I think the cb pipe is 1 degree every 100ft I thing is is do able

[willieG]

you better do some investigating, that is a long way to run pipe..insulation and heat loss is not your big concdern, i would guess piping size to move water that far without creting too much head loss would be your biggest concern (and cost)

some guys say you can get tripple wrap for 5 or 6 bucks a foot but that would likley be 1 inch

i think you may be looking at a much bigger line than that?

[RSI]

How many BTU's do you need at the end of the 600'? You will need to get some big pipe to flow enough GPMs if you need much heat.
If you want to do it with no splices there aren't a lot of choices with that length.  I think Thermopex comes in 800' rolls but 1-1/4" is around $15 per foot. At $9000 you might as well just get another boiler. You could do it with 5 wrap 1-1/4" with one splice in the middle for under $4000. If you are heating a very large area 1-1/4 might not even be big enough. 1-1/2" pex is almost $5 per foot more than the 1-1/4"

[MattyNH]

Yeah that underground pipe is not cheap at all..Like RSI mentioned..You might as well buy another boiler.. Might be cheaper...I know 2 people  that have 2 outdoor wood boilers..One for the house and the other for the shop... Boiler set by house and other boiler set by shop...The other person has it for apartments and other for a business.. Boilers set next to each other..

[willieG]

a little rough figuring for 10 gpm =

1 inch pex about 6.3 feet of head per 100 feet
1.250 inch pex about 1.7 feet of head per 100 feet
1.500 inch pex about .75 feet of head per 100 feet

[RSI]

Where did you get those numbers? Is there a chart or something that shows different sizes and flow rates?

[willieG]

see if you can get this link to work. im not sure if you need it all or not. it opend in a pdf i think

http://www.google.ca/url?sa=t&rct=j&q=pipe%20to%20move%2010%20gpm%20600%20feet&source=web&cd=11&ved=0CCkQFjAAOAo&url=http%3A%2F%2Fwww.midc-ent.com%2FPump%2520Basic-Sizing.pdf&ei=IQEqT5WSMpLlggeCxZDfDw&usg=AFQjCNGlfbQ3KegKc5dOA2PY1qJPE-4kCg

[willieG]

it is mostly about well pumps but soewhere down teh pages it has a chart for pipes and gpm and head loss

[RSI]

Is it for pex or some other type of pipe? Pex is the same outside diameter and copper but had a wall thickness 1/9th the diameter so the larger sizes have pretty thick walls.
1-1/2" pex measures just over 1.25" ID and is 1.625" OD. If your ratings were for another type of pipe you probably have to go a size up to be equivalent.

[willieG]

Is it for pex or some other type of pipe? Pex is the same outside diameter and copper but had a wall thickness 1/9th the diameter so the larger sizes have pretty thick walls.
1-1/2" pex measures just over 1.25" ID and is 1.625" OD. If your ratings were for another type of pipe you probably have to go a size up to be equivalent.

figures used were for plastic..1 inch being 1.09 id 1.25 is 1.38 id and 1.500 is 1.61 id (according to chart)

so maybe we go to 14 gpm and still callit 10

1 inch 11.8 ...1.25 3.10 and 1.5 1.46 (these are just guesses now that youahve given correct id of pipes) i think they will do for rough figuring?

i will look for a chart for pex...stay tuned

[RSI]

If your numbers are close it might work with 1-1/4" pex and two PL36 pumps. Another option would be two PL55 pumps if necessary.

[willieG]

best i can find right now RSI

1 inch with ID of .865 10 gpm 6.134 feet of head per 100 feet

1.25 inch with ID of 1.055 10gpm 2.367 feet f head per 100 feet

1.500 with an ID of 1.245 10 gpm 1.070 feet of head per 100 feet

[Durzz]

Good questions!

My home is right at 4000 sq ft

By business is about the same.

Im not sure how to figure out how much btu I will need.  If someone will tell me I will figure it out.

Not sure if it matters but my business has half in floor heating with a boiler and the other half is forced air furnace.

Sorry I don't know much about this but I guess that is why I'm here. 

[RSI]

What size is the existing furnace and boiler? That is the easiest way to get a good guess going off how often they run. It looks like 1.25" will probably work ok with the right pump(s).