So glad to see this works so well.
I had the same idea and my wife thought I was crazy until I found your product. I will recommend everyone buy and not build, very nice machine, built with expert craftsmanship. This thing throws out some amazing heat warming our entire home!
Look forward to sound a custom fitted insert with glass doors this summer, http://hastyheat.ecrater.com/p/12534013/insert-fireback-fireplace-grate-heater?keywords=Insert