Ok here's the minor additions I added to the new Tundra replacement unit.
-firebricks at bottom of loading door.(SBI only used them up the sides.
-installed small amounts of rock wool insulation around inside corners of top of loading door cut out in firebox and where main air comes in.
There is insulation in the gap between the last vertical firebrick lining the sides of the firebox door cut out and the top of the cut out flange. This gap was large an direct heat was still exposed to firebox corners here. The insulation helps hold fire bricks snug, insulates corners further, and allows for fire bricks to expand. Important to rem when messing w firebrick n steel, firebricks will expand a ton compared to the steel.
2nd pic shows insulation (rock wool) in the corners where the air inlet is to further help insulate the corners.. Well in hindsight thinking back I am removing this insulation cause all its doing is keeping flowing fresh cool air from contacting those areas of metal as air is pulled in. The air prob cools more than insulation will protect.
The final pic simply shows additional fire bricks I added at bottom of door. SBI tech dept recieved these pics and approved these methods. Mainly the added firebrick they approved. SBI said me adding bricks is fine and reason they didn't was to allow for max volume in fire box for better complete burn.. Really? 8 cubic inches? Lol
I do feel w changes SBI has made and the few extra measures I took this stove will be fine. Works very well better than old model did.
SBI was great to deal w an shipped me a brand new updated model. I keep the old one. Still works. Damage really is minimal an doesnt affect function at all. Drilled hole crack at HE stopped. Prob would sell for cheap. Firebricks already added so it prob run fine for a long time.
SBI will stand behind their products. One should have no fear in purchasing SBI products. Tundras r great economy line models of high efficiency furnace. Lotta bang for your buck and solid warranty.
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