Had and have a 50x55 wood shop thats fit the bill for over 30 years now, aside from being too short and not long enough.   Spent three years trying to figure out how to addon, and raise the old shop, but settled on this.   Its just about done now, waiting for the epoxy on the floor to dry.   We put the tubes in the floor, just haven't settled on what to use for energy.   For us to spend time cutting and feeding a wood settup just isn't in the cards, labors not cheap, and I don't want to baby sit it in the winter.  I can see how it can be very efficient if those situations are not a problem for you.

Our new "washbay/shop" is 48x80 x 22' high.  If the suns out, we don't need to turn the lights on.

Door(s) are 24x18 and 16x18 with a post in the middle that swings out and is winched up out of the way if ya want a 40' opening.  Will take pics tommorow

(floor heat 005 (600 x 450).jpg)

(floor heat 004 (600 x 450).jpg)

floor heat 005 (600 x 450).jpg (49KB - 113 downloads)

floor heat 004 (600 x 450).jpg (42KB - 104 downloads)