Calculator

Key Takeaways Infrared heat warms people and objects directly; it does not heat the air, making it effective outdoors where warmed air escapes immediately. A covered patio needs roughly 25 watts per sq ft; an open-air deck needs 28 to...

Use this propane to natural gas conversion calculator to find the correct burner orifice diameter for your fire pit or outdoor appliance in decimal inches, millimeters, and the nearest standard drill bit number. Enter your BTU rating to get the...

Key Takeaways 1 therm = 100,000 BTU exactly. This is fixed by federal and state utility regulation. 1 CCF = approx. 102,000 BTU at the standard heat content of 1,020 BTU per cubic foot. 1 MCF = approx. 1,020,000 BTU...

Key Takeaways Required combustion air CFM = stove BTU input divided by 2,400. A 45,000 BTU wood stove needs roughly 19 CFM of dedicated combustion air if the room cannot supply it through natural infiltration. A room is confined if...

  Key Takeaways Wood stove installation (labor only) runs $1,100 to $5,500; chimney condition is the dominant cost variable. Gas fireplace installation averages $2,300 to $10,000; get the gas line quote first, before selecting any appliance. Electric fireplace inserts cost...

  Key Takeaways Full heat costs $0.27 per hour at the US average electricity rate. The national residential average hit $0.1844 per kWh in May 2026 per the EIA. A 1,500-watt fireplace on full output costs approximately $0.28 per hour....