Below freezing with no furnace, heat is not a comfort — it's survival.
Off-grid wood heat is the practice of keeping a home warm without electric or gas utilities, primarily using a wood-burning stove. It covers matching a stove's BTU output to square footage and insulation, seasoning firewood and estimating the cords needed, safe stovepipe routing and clearances, and combining a primary heater with a different-fuel backup. GridDownData stores this guide on an air-gapped USB drive so it is available during outages, at a remote cabin, or any winter emergency without internet.
When the furnace has no power, staying warm becomes a planning problem you solve before winter, not during it. GridDownData carries an offline guide to heating without the grid: sizing a wood stove to your space, seasoning and estimating firewood, safe stovepipe and clearance practices, layered backup heat, and passive measures that hold warmth in — stored on an air-gapped USB drive that works in the cold and dark.
Frequently asked questions
How much firewood do I need for a winter?
For a well-insulated home, roughly six cords of seasoned hardwood keeps a common room livable through a cold season; drafty or far-northern homes may need half again or twice that. The guide explains cords, seasoning times, and how to estimate your own needs from climate and home size.
How do I size a wood stove to my space?
Match the stove's BTU rating to your square footage, insulation level, and winter severity — an oversized stove overheats and runs inefficiently, an undersized one never keeps up. The guide covers BTU-to-area rules of thumb, burn-time considerations, and why modern non-catalytic stoves hold overnight heat well.
How do I burn a wood stove safely?
Safe operation means correct clearances to combustibles, proper stovepipe routing, regular chimney cleaning to prevent creosote fires, and adequate combustion air. The guide details clearance distances, seasoning wood to cut creosote, and carbon-monoxide awareness so heating your home does not become the emergency you were preparing for.
Why plan more than one heat source?
Relying on a single heater is fragile. A robust plan pairs a powerful primary stove with a backup that uses a different fuel, plus passive measures like sealing drafts and closing off rooms to concentrate heat. The guide shows how to layer these so one failure does not leave you cold.