Heat & Glo Supreme Insert 25" Fireplace Insert

A fireplace is the heart of a mountain home — but mountain living brings cold, outages, high altitude, and big open rooms. Here's how to choose between wood, gas, pellet, and electric, and get the heat, safety, and scale right.

A fireplace won't replace your furnace — but it can meaningfully heat the spaces where you actually spend your time, reduce your furnace run time by 20–40%, and keep your family warm during a power outage. This guide explains how zone heating works, compares BTU output and efficiency across gas, wood, and electric fireplaces (with specific models from Valor, Kozy Heat, Heatilator, Heat & Glo, and Stûv), walks through three real-world Idaho heating scenarios, and shows you why a fireplace BTU feels warmer than a furnace BTU.

Most people compare wood and gas fireplaces by sticker price and stop there — but the purchase price is only part of the story. The real question is total cost of ownership: what you'll spend over the years to buy, fuel, and maintain it, plus the value of things that never show up on a receipt, like ambiance and heat during a power outage. This guide breaks down the true 10-year cost of each in Idaho using real local numbers — the cheapest natural gas in the country (~$0.50/therm) and affordable firewood (~$200/cord) — across upfront, fuel, and maintenance. Spoiler: gas usually wins on cost, but wood wins on the intangibles. Here's how to decide which is right for your home.