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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....

Key Takeaways Chimney repair cost averages $400 to $2,500 for most homeowners. Minor crown sealing and cap replacement sit at the low end. Liner replacement and full rebuilds above the roofline drive the high end of the range. DIY liner...

Every outdoor fireplace cost guide gives you a range from $1,500 to $21,000. That range is too wide to budget from. This outdoor fireplace cost calculator works through the five variables that actually move the number and returns a project...