A wood stove is a significant investment — and the wrong choice can mean a stove that's too small to heat your space, too large to burn efficiently, or incompatible with your chimney. Here's what to consider before you buy.
Wood stove output is measured in BTUs (British Thermal Units). As a rough guide, you need approximately 20–30 BTUs per square foot of space you want to heat. A 1,500 square foot open-plan space might need a 30,000–45,000 BTU stove. But this is just a starting point — ceiling height, insulation quality, and climate all affect the calculation.
Bigger is not better. An oversized stove will overheat the space, forcing you to burn with a restricted air supply — which produces more creosote and reduces efficiency. An undersized stove will run at full output constantly and still not keep up.
All new wood stoves sold in the United States must be EPA-certified. Look for the EPA Step 2 certification, which represents the current standard for emissions. EPA-certified stoves burn more completely, produce less creosote, and extract more heat from the same amount of wood.
Every wood stove has minimum clearance requirements — the distance from the stove to combustible walls, floors, and ceilings. These are specified by the manufacturer and must be followed. If your space doesn't accommodate the clearances for the stove you want, you'll need to install a heat shield or choose a different model.
Clearance requirements are not suggestions — they're fire safety standards. Installing a stove without adequate clearances is a code violation and a fire hazard.
Wood stoves must be installed on a non-combustible hearth pad that extends a specified distance in front of and to the sides of the stove. The size of the required hearth pad depends on the stove's leg height and the size of the door opening.
Before buying a stove, know what your chimney can accommodate. The stove's required flue size must match what you can install. If you have an older masonry chimney, you'll likely need a new liner sized for the stove. Factor this into your budget. See our stove installation checklist to know what to expect.
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