Grid-Down Guide

Off-grid living

Wood Heat

Heat with wood safely and efficiently — choosing a stove, how much firewood you need, seasoning, splitting, and preventing chimney fires.

Photo: Berillium, Public domain

Why wood heat

A wood stove heats a home with zero electricity. In a winter outage, it's the difference between camping in your living room and living normally. Off-grid, it's the most common primary heat in cold, forested country like ours.

Stove, insert or fireplace?

Heat output Efficiency Notes
Freestanding wood stove high 65–80% (EPA-certified) the best choice for outage and off-grid heat; most have a flat top for cooking
Fireplace insert medium–high 65–80% turns an open fireplace into a real heater
Open masonry fireplace low 10% or less, often negative pretty, but pulls warm air out of the house
Pellet stove medium–high 70–85% needs electricity for the auger and fan — only works in an outage with a battery or generator
Wood cookstove medium varies heats, cooks and can heat water; the classic homestead option

Buy an EPA-certified stove. They burn cleaner, need less wood, and are required in many areas. Installation must meet code — clearances to walls, floor protection, and a proper chimney. Get a permit and inspection; your insurer will ask.

Black cast-iron wood stove in a home
A wood stove keeps a home warm with no electricity at all.Photo: Daniel Schwen, CC BY-SA 4.0

How much wood?

A cord is a neat stack 4 ft high × 4 ft deep × 8 ft long (128 cubic feet). A "face cord" or "rick" is usually only one-third of that — ask what you're buying.

Rough guide for the Inland Northwest:

  • Backup / outage heat: ½–1 cord gets you through several long outages.
  • Supplemental heat (evenings, cold snaps): 1–3 cords a winter.
  • Primary heat for an average, reasonably insulated house: 3–6 cords a winter.

Common local woods: tamarack (western larch) and Douglas fir are excellent; ponderosa pine burns fast and lighter; birch is good; seasoned cottonwood is poor.

Seasoning: the most important part

Wet wood barely heats, smokes, and coats your chimney with creosote. Firewood should be below 20% moisture.

  • Cut, split and stack wood 6–12 months before burning (softwoods) — longer for dense hardwoods.
  • Stack off the ground on pallets or rails, bark up, with air gaps between rows.
  • Cover the top only. Leave the sides open so wind dries it.
  • A moisture meter ($25) removes all guesswork: split a piece and test the fresh face.
  • Seasoned wood is lighter, has cracks in the ends, and makes a hollow "clack" when two pieces hit.

Burning well

  1. Top-down fire: big splits on the bottom, smaller on top, kindling and paper on the very top. Light the top. It burns down cleanly with little smoke.
  2. Open the air control fully while starting, then turn it down gradually once the fire is established — but never so low that it smolders.
  3. Look at your chimney from outside: clear or white wisps are good; thick dark smoke means wet wood or too little air.
  4. Burn hot fires regularly. Long, smoldering fires build creosote.
  5. Never burn trash, cardboard, painted or treated wood, plywood, or driftwood (salt).

Chimney fires

Clean your chimney every year

Creosote is a black, flammable tar that builds up inside chimneys. A chimney fire roars, shakes the pipe, and can spread into the house. Have the chimney inspected and swept at least once a year — more often if you burn a lot. If you hear a roar, see flames or sparks from the top, or the stovepipe glows: close the air controls and stove door, get everyone out, and call 911.

Also: keep a CO alarm and smoke alarm near the stove, a fire extinguisher in the room, and a 3-foot clear zone around it. Store ashes in a lidded metal can, outside, on a non-flammable surface.

Splitting and safety

  • A splitting maul (6–8 lb) or a modern splitting axe does most work. Split on a chopping block, not the ground.
  • Wear safety glasses and boots. Keep your feet wide and bystanders well back.
  • Chainsaw work needs chaps, eye and ear protection, a helmet, and training. Most chainsaw injuries come from kickback. Never cut above shoulder height or alone.
  • Know the rules for firewood cutting on public land — the Colville and Idaho Panhandle National Forests sell personal-use firewood permits.

Sources: EPA — Burn Wise · Chimney Safety Institute of America · NFPA — Heating safety

Watch & learn

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