Ground lines are pex. They are buried below the frost line inside 9 inch sewer conduit. And then inside the conduit the individual lines are insulated. Problem I think is the distance being About 60-70 yards, which is a guess and not a measurement, and a 22 foot high great room wall of windows. Lines are under a driveway for part of the way, son I don’t think I’ll be doing much advanced diagnostics
Distance is no big deal 180 feet .. just check the temp at the boiler out line .. and the house in line . Should be the same temp. If it's not there's issues.. fare as big glass windows ceiling fans mix that air. Heat550 I have 560 feet of pex running in 3 different loops from boiler. Lucky if I see a 1 degree drop. 4 inches of polyurethane spray in foam around 2 of the loops and insulseal was used on the 3rd loop. All 30 inch deep. Sent from my LG-H900 using Tapatalk
I had 85 feet of thermopex between my pellet boiler and the house. Thermopex is rated at 1 degree lost over 100 ft. This was in Maine, the ground stayed frozen and the snow didn't melt over the run, and it was only about a foot underground. The underground pipe is no place to go cheap. My thermopex was 11.50/foot, but it was 100% worth it. Most of those PEX in a pipe with some bubble wrap insulation sellers have really optomistic rating numbers. The easiest way to tell, look at the ground over the pipe when it snows. If you can see any melt over the pipe, it is wasting your fuel
Here's what I used on my one loop . 10 ft sections 4 inch inside 2 in polyurethane covered with super heavy plastic and used 4 inch wonder underground tape . R19 total . Joints are glued and siliconed foam joints. Insul seal they call it .. 0 heat loss be in 60 feet . It comes down to it's hard to detect .5 heat loss splitting hairs. Like $10 a foot without pex. Heat550 Sent from my LG-H900 using Tapatalk
If you install these insul seal underground pipes..next problem. Is snow milting around house .. and snow milting off the roof at -10f underground boiler line insulation is a big deal to a outdoor boiler. Every thing has a curve to how it absorbs heat. Frost in the ground and 180f lines . Yes it will loose heat .. the question is how much heat are you loosing when the grounds frozen .This is the real test. Not above freezing like company's test there product at.. it's all buyer beware. Heat550 Sent from my LG-H900 using Tapatalk
