radiant heat

I have a 40'w x 63'L shop built w post frame construction and I put in-floor heat. I used 1/2" pex tubing in concrete that I installed myself. Then I hooked up to circulating system and electric boiler set on off peak rates controller. Here in ND the power company powers off peak only 12 hrs a day in winter. The system works great, I set at 55 or 60 degree and it keeps it constant all winter. I work in flannel shirt or sweatshirt and am comfy. I may convert it to natural gas boiler in future cause power rates have gone up. The walls have R19 and ceiling R30. On the floor insulation I used 2" foamboard on edge and 1.5" from edge inward 4 ft. The circulating system is a Hydra-Smart panel purchased from Menards. It has been trouble free for 4 years. If you have questions send PM. I have pix if you need to see something.