EcoRenovator - View Single Post - Remodeling the office (new floor, ceiling & adding insulation) passive house retrofit

Daox · 09-24-13, 12:12 PM

Back to the office remodel again! I worked on drywalling the ceiling again last night and I'll be at it again tonight.

However, now I'm trying to figure out the floor heating ahead of time. I think my current setup idea is pretty good, but I am always willing to hear suggestions.

The floor will be hydronically heated via my solar hot water system (which isn't yet up) and probably will eventually have a boiler backup. This means it is designed with lower water temperatures in mind.

The current plan is to use 3/8" pex tubing in wood grooves on 6" centers with aluminum heat spreaders similar to this:

I will be running a few of the 3/8" lines in parallel to reduce the pumping power required for it. See more info here: http://ecorenovator.org/forum/renova...r-heating.html

I have about 1 3/8" of floor depth to match the other rooms. From top to bottom I have:

.56" bamboo flooring
~.02" heat spreader
.50" pex tubing
.25" XPS insulation for a thermal break (I assume I can get this via special order)
1.33" total thickenss

I am a little worried about how I'll lay out the tubing. With 6" on center tubing I have to either find 3/8" PEX with a 3" bend radius (typical is more like 4" according to pex universe), or make the tubing layout a little fancy.

09-24-13, 12:12 PM	#136
Daox Administrator Join Date: Aug 2008 Location: Germantown, WI Posts: 5,525 Thanks: 1,162 Thanked 374 Times in 305 Posts	Back to the office remodel again! I worked on drywalling the ceiling again last night and I'll be at it again tonight. However, now I'm trying to figure out the floor heating ahead of time. I think my current setup idea is pretty good, but I am always willing to hear suggestions. The floor will be hydronically heated via my solar hot water system (which isn't yet up) and probably will eventually have a boiler backup. This means it is designed with lower water temperatures in mind. The current plan is to use 3/8" pex tubing in wood grooves on 6" centers with aluminum heat spreaders similar to this: I will be running a few of the 3/8" lines in parallel to reduce the pumping power required for it. See more info here: http://ecorenovator.org/forum/renova...r-heating.html I have about 1 3/8" of floor depth to match the other rooms. From top to bottom I have: .56" bamboo flooring ~.02" heat spreader .50" pex tubing .25" XPS insulation for a thermal break (I assume I can get this via special order) 1.33" total thickenss I am a little worried about how I'll lay out the tubing. With 6" on center tubing I have to either find 3/8" PEX with a 3" bend radius (typical is more like 4" according to pex universe), or make the tubing layout a little fancy. __________________ Current project - To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. & To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.