GR is for Grate tubular log holder rack log heat exchanger hot air blower
GR is for Grate, Solid built express line tool welded steel iron tubular firewood log rack wood holder. Spit emits direct tube fire heated furnace air circulator into your cozy home. Increase efficiency and heater output of your wood burning fireplace. My 3Q model line blower outlet is a fair way to go for glass doors. We also offer wood stove chimney pipe pellet stove green heat exchanger or water heater. Northern original hearth design smart heat exchanger. Mountain savings time online eco fire discount store shipped by land to your door, north to shore. Way to plow into heating savings.