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Well-constructed, nice heater. Easy to hook up, adjust and works very well for my 4000 square foot shop. AFC was great to work with, shipping was right on time and no damage.

This is my second GG heater, and I bought it because the first one did so well. Both have been installed in freestanding woodworking shops. The first one I had 6 years before we moved, and this one I've had 7 years now. My only complaint with the second one is the control board went bad after 6 years. I expect these things to fail occasionally and that isn't specifically my complaint, but the replacement cost $500, 70% of what i paid for the furnace. Even so, I thing the GG line of furnaces are as good as this type can be and I recommend them.

ACF Greenhouses: I'm sorry to hear you had an issue with your heater and wish you had asked us about purchasing a replacement board because we sell them for half that price. I hope the new unit gives you many years of trouble-free operation!

High quality and fit was also good, I've used it now thru the 2018 winter and has worked very well it's very quiet compared to my 60,000 BTU one I had before this one.