Outdoor Wood Furnace Info

Outdoor Furnaces - Manufacturers WITH EPA-Certified Models => Portage & Main => Topic started by: woodwalker2010 on June 13, 2013, 07:35:15 PM

Title: Supply and returns
Post by: woodwalker2010 on June 13, 2013, 07:35:15 PM

I purchased an ML36, and was wondering, does anyone bring the supply out the bottom of the boiler and the returns in the top? I understand the water up top should be hotter, but my mind wonders if circulation would be better to return into the top. I plan on running my pump 24/7 during the heating season. This may make no difference or may be worse on the stove. Does anyone have any experience with this, good/bad? Haven't built the first fire in this unit yet but, I think I'm going to like it.

Title: Re: Supply and returns
Post by: slimjim on June 19, 2013, 05:39:02 AM

supply should come out of the top, cold water returning on the top may shock the boiler when mixing with the hot water and create condesation in the heat exchanger, temp gauges on supply and return at the boiler will tell you what the differential is, there should be no more than 20 degree diff,  circulator sizing can be adjusted to bring diff down, the less diff. the better for the stove.