BPatrick wrote:Guys. Thanks for the replies. Indoor isnt an option. Our add on room has coal stove replaced a wood stove and chimney already there. Again I cannot do in house basement. I have to make the existing out building work. I don't undestand why I will lose so heat if I use well insulated lines. Also I will be using the outbuilding. I don't want to do a owb and burn up money.
First off, since you are from MI, do you have access to anthracite ??
You will lose some heat just due to the fact that there is a distance between the heat applied to the water in the outbuilding and then having to transfer the heat inside the house itself. You can mitigate this loss with some insulation but there will still be some loss.
Do you have access to a backhoe or trenching machine ?? These pipes will need to be buried deep up your way. Depending on the soil type and conditions, you may need to install some sort of drainage to keep any ground water away from the underground piping.
It can be done. But it also may cost some cash to get this up to your liking.
Then we will have to discuss the controls. Some run a pump from the boiler 24/7, some run it on demand. There are various ways to do this.
Keep asking away. You will eventually get the answers you need.