Furnaces/Heaters
A collection page of Big Frog Supply
About
Gas furnaces and space heaters for comfortable, room by room heat. Shop sealed direct vent wall furnaces and vent free heaters (where permitted), in natural gas or propane, plus the venting, controls, and parts to complete the install. Shop by need Rinnai EnergySaver® Direct Vent Wall Furnaces deliver efficient, ductless heat with sealed combustion and flexible through-wall venting. Ideal for whole-room and zone heating where running ductwork isn’t practical, the D-Series modulates output to maintain even, quiet comfort. Install along an exterior wall and vent straight out with the matching kit. Models available in Natural Gas or Propane. Rinnai’s Vent-Free Fan Convectors deliver fast, efficient heat without ductwork—making them a smart solution for small, medium, and large rooms that need reliable warmth. This collection includes four models designed to match your space and fuel type: the compact FC510N and FC510P , and the higher-output FC824N and FC824P . Fuel: natural gas and propane models; select conversion kits as specified by the manufacturer The “A” vent kit is included with the EX Series appliance A Vent Kit Kit No. FOT-151 Fits Walls 4 1/2 - 9 1/2 in (115 - 240 mm)