dstig1
Super Member
- Joined
- Apr 7, 2010
- Messages
- 5,018
- Location
- W Wisc
- Tractor
- Kubota L5240 HSTC, JD X738 Mower, (Kubota L3130 HST - sold)
There is a lot of misinformation about radiant. It can be more efficient, but it is not that way by default. The biggest issues around efficiency are insulation. If you have a slab, it needs to be insulated and quite well insulated at that. Same with the building. If you don't have good insulation and air sealing, then you will be inefficient. The good thing about radiant is the low temps it runs at. this helps efficiency some as it is better to have a lower temp drop for efficiency, but many other factors come into play. If you lose heat because the building is a sieve, then it doesn't matter how much better the low temp drop is for efficiency, for example.
I think the tubing was 5/8" but it may have been 1/2". Too much to remember... Spacing was 9" or so. After a few days of messing with the settings i got it set pretty decent, and left it like that all winter. My gas bills were heavily skewed by the construction heater in the largely uninsulated house for the winter, so it is hard to say what it did, but the first few weeks were looking decent before I got the construction heater in place, but then that was before the real cold hit...
Putting tubing in a slab is an extra few hundred dollars. Even if you never connect it, it isn't a big deal. But you can't do it later. Talk to a couple of the radiant places in vermont - radiantec and radiant floor co for example. They can lay it all out for how much of what you need, and then you can buy stuff from them or elsewhere if you like. Those guys are pricey but it help a lot for the first part. I bought a lot less from them for the house after doing the shop, once it became clear what to do.
I think the tubing was 5/8" but it may have been 1/2". Too much to remember... Spacing was 9" or so. After a few days of messing with the settings i got it set pretty decent, and left it like that all winter. My gas bills were heavily skewed by the construction heater in the largely uninsulated house for the winter, so it is hard to say what it did, but the first few weeks were looking decent before I got the construction heater in place, but then that was before the real cold hit...
Putting tubing in a slab is an extra few hundred dollars. Even if you never connect it, it isn't a big deal. But you can't do it later. Talk to a couple of the radiant places in vermont - radiantec and radiant floor co for example. They can lay it all out for how much of what you need, and then you can buy stuff from them or elsewhere if you like. Those guys are pricey but it help a lot for the first part. I bought a lot less from them for the house after doing the shop, once it became clear what to do.