I agree, stay away from the outside wood boilers/furnaces/ water heaters, what ever you want to call them. They also use LOTS of wood. Great advice you've gotten so far. As long as you're starting from scratch, I thought I'd put the cart in front of the horse here. If your plumbing is going to be a Primary/Secondary system, I'd put two or three extra take offs in the primary loop. When sizing the boiler, choose one that is capable of heating more than just the house. EXAMPLES: Domestic Hot water, garage, pool, in floor heat, driveway, addition, out building, etc.. You get the picture. Now is the time to do it, and it would cost peanuts to do so. You may never use any more take offs but, should you need one, it's there. I added one extra to my primary loop for domestic hot water. When/if I install the indirect tank, all I do is tie it in, and open ball valves. None of the system is disturbed. I should have added one more take off for the near future attached garage. But, that's OK, as my boiler is at it's capacity now, and would not handle additional load of garage. See where I'm coming from?
Last edited by oliver power
on Mon Jan 27, 2014 4:09 am, edited 1 time in total.