Moved into a home with a P33 direct vent gas fireplace. As a retired gas fitter having installed about 1000 units of various manufacturers over 30 years (never a Regency) , I must say the engineering on this unit is suspect. Have never seen such a wiring harness mess or poor method of holding the ceramic glass in the frame. The instructions state a bunched up gasket makes install problematic - why not prevent it from getting "bunched up" and simple to re-install after cleaning. Hope your engineering dept. has made some "continuous improvements to product. For thousands of homeowners out there with this product, would guess they are also not impressed.