Use of A.I.M Radiant heating system

Scott Morris

I am looking into getting ride my forced air system and replacing it with radiant heat. I like the looks of the AIM Radiant heat system and the boiler in a box. Does anyone have this system or can someone give me some advice on using a tankless heater for my radiant heat. I am looking at mostly doing baseboard heat.

http://www.aimradiantheating.com/

Jeff Lawrence_25

Maybe not a bad idea

But.

Using their system in an underfloor application with out heat transfer plates means that you have to use water that is considerably hotter than if you did use plates.

I designed a job not long ago and compared the exact same areas with and without plates. I needed 150 degree water if I did a suspended system (like AIM suggests), but only 120 degree water if I used plates. It costs a lot less to heat water to 120 degrees.

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Unknown

If you're doing baseboard, you need higher temps than a tankless heater can handle, you need a boiler. Perhaps a wall-hung modulating boiler... looks a bit like a tankless, but it's a different animal... but a boiler nonetheless.

I agree with previous poster that suspended tube applications without plates are pretty bad.

I would make sure the company does room-by-room heat load calculations before following their designs. If they can't produce the numbers, they aren't designing your system, you're getting a cookie cutter system that may or may not work in your home.

If they do provide the numbers, check out the difference with and without plates. Suspended tube is for low loads.