radiant heat

I installed radiant floor heat in my shop. 3456 sq feet. I used 2" foam board under the concrete , and on the sides to break from the foundation walls. I used 3/4" pex, six loops, mine are probably a little long. We'll insulated walls, 1" spray foam with an r19 batt over that. R30 in the 15' high ceiling. I am using a natural gas takagi water heater. Keep it at 58 degrees, all winter. Most expensive most so far was $60. I didn't think that was too bad, plus I love not working in the cold.