One piece adjustable damper
One shot heat exchanger burner
One-piece hood for an outdoor grill
Open air stove
Open cell sheeting
Open ended molded fireplace box and method
Open fire camp stove
Open fire convector
Open fire cooking apparatus
Open fireplace
Operating mechanism for fireplace damper
Operating method for a solar collector plant, and control unit f
Operating valve for a pressure cooker
Optical system for creating high-intensity solar light beam
Optional discharge oven vent
Orchard heater
Orientable pyramid-shaped solar collector device
Orientation mount for a solar heating module
Outdoor appliance enclosure
Outdoor barbeque grill