Best Firewood for Heating - Highest-BTU Hardwoods, Kiln-Dried

Updated June 29, 2026

Quick answer: The best firewood for heating is dense hardwood - oak, hickory, ash, maple, birch, and cherry - burned dry at under 18% moisture. Density gives you more BTUs (heat) per log, and low moisture means that heat goes into your room instead of boiling off as steam. Firewood Flex is a kiln-dried blend of exactly those species. Order it by the 1/4 cord ($399), 1/2 cord ($749), or full-pallet bundles.

Two things decide how much heat firewood gives you: the species (density) and how dry it is. Get both right and a single load heats your home for hours. Get them wrong and you're feeding the fire all night for half the warmth.

1. Species: Burn Dense Hardwoods

Dense hardwoods pack more wood fiber - and more stored energy - into every log, so they burn hotter and longer than softwoods or light hardwoods. The top heating woods are:

  • Oak - one of the highest BTU woods; long, steady, slow burn. Ideal for overnight heat.
  • Hickory - among the hottest-burning firewoods, dense and long-lasting.
  • Ash - excellent heat output and easy to burn.
  • Maple & Birch - dense, hot, with a bright clean flame.
  • Cherry - steady heat with a pleasant aroma.

Firewood Flex is a carefully selected blend of oak, maple, ash, birch, hickory, and cherry - so every order is the high-heat hardwood mix, not a pile of unknown or softwood filler.

2. Moisture: Dry Wood = Real Heat

Even the densest oak heats poorly if it's wet. Roadside "seasoned" cordwood is often 25-40% moisture - burn it and much of the fire's energy is wasted turning that water to steam. That means less heat, more smoke, and more creosote in your chimney. Our wood is kiln-dried to under 18% moisture, so the energy goes where you want it: into your room.

Kiln-Dried vs. Seasoned for Heating

  • Ready now - no waiting 6-12 months for green wood to season. Kiln-dried is ready to burn the day it arrives.
  • Hotter, cleaner burn - consistently low moisture means more usable heat and less smoke than air-dried wood that varies pile to pile.
  • Pest-free - USDA heat-treated at 160°F for 75 minutes; nothing crawls into your home with the wood.

How Much Heating Wood to Order

  • Supplemental heat: a 1/4 cord or 15-bag half pallet covers most of the season.
  • Regular heat: a 1/2 cord or 30-bag full pallet for a typical winter.
  • Primary heat: start with a 1/2 cord and reorder as the deep cold arrives.

Compare units on our Cord of Firewood guide, or size it with the Firewood Calculator.

Heating Firewood Prices

Free delivery to CT, DC, DE, MA, MD, NH, NJ, NY, PA, RI, and VT. Order before noon ET for same-day shipping on packaged bundles. Palletized cords deliver within ~100 miles of Levittown, PA.

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Local Firewood Delivery

Firewood Flex delivers kiln-dried hardwood across the Northeast from our Levittown, PA facility — biggest coverage in New York, New Jersey, and Pennsylvania: