Originally Posted by skoronesa
You bring up a good point. I would use a plate to plate heat exchanger to isolate the radiant from the cooling system. This would be placed in a visible location with bypass valves for the hot weather. It would require a circulator pump on the radiant side.
This would actually kill several birds with one stone.
-Eliminate the chance of a leak in the radiant affecting the cooling system
-Limit the amount of heat sucked from the coolant system minimizing shock to the engine
-Allow you to effectively stop the heat when you want.
-Allow you to run normal antifreeze in the radiant system and use standard al-pex instead of something compatible with the engines cooling system.
Thank you for your constructive criticism!
I like where this is going. It only requires an additional small circulation pump added to the load on solar system and solves the potential issue of antifreeze leaking in the cabin. Some radiant floor heating examples installed in vans I've seen require separate heaters for the coolant (water). This to me is incredibly energy intensive and not to mention wasteful of the heat being generated by the engine. Of course you would need to run the vehicle to get heat. Although as a thermal mass water is hard to beat and that heat can be held on to for a bit assuming insulation is sufficient.
If you've ever felt what it's like walking barefoot on a heated floor in a house in the dead of winter.. it makes a huge difference and it's actually quite subtle. The floor doesn't need to be anywhere near hot or even all that warm, the chill just needs to be taken off of it and you're in new territory.
I had a great chance to install something like this, except time is of the essence and I had to move on with getting my build done. Once I find a good penthouse top to put on.. I am adding this to the remodeling!
Great input all around guys