Quadra-Fire Outside Air Kit for Pellet Stoves Part # 811-0872 Replacement Outside Air Kit (Rear Mount) for Quadrafire and Heatilator Eco-Choice Pellet Stoves. Includes 3 flex hose, hose clamp, collar assembly, termination cap assembly, trim ring, intake air channel, 12 screws and instructions (cover plate and pre-cut screen included, for use with for 1200 only). Fits the following HHT models: Quadrafire Pellet Stoves: 1200 1200i Castile Castile Insert Contour Mt Vernon Santa Fe Santa Fe B Santa Fe Insert Heatilator Eco-Choice Pellet Stoves: CAB50 PS35 PS50. This item should be installed by a qualified technician and requires unit disassembly.