How Homes Are Heated: A Complete Guide to Residential Heating Systems

Home heating systems vary by climate, fuel availability, building type, and budget. Here's a breakdown of the seven primary methods.

1. Central Forced-Air (Furnace + Ducts)

Most common in North America. Gas, propane, or oil furnace heats air; blower pushes it through ducts. Can integrate AC, filtration, humidification. Efficiency: 80–98% AFUE.

2. Hydronic (Boiler + Radiators/Baseboards)

Gas/oil/electric boiler heats water/steam → circulates through radiators, baseboards, or radiant floors. Silent, even heat, no ducts. Efficiency: 85–95% AFUE. Common in Northeast US, Europe.

3. Heat Pumps (Air-Source / Ground-Source)

• Air-source: Moves heat from outside air (even at -15°C). 300–400% efficient (COP 3–4). Doubles as AC. Best in mild climates; cold-climate models work to -25°C.
• Ground-source (Geothermal): Uses stable earth temp (10°C). 400–500% efficient. High install cost ($20–40K), low operating cost. Federal tax credits (US).

4. Electric Resistance

Baseboard heaters, wall heaters, electric furnaces. 100% efficient at point of use, but expensive where electricity is costly. Simple, zonal, no venting. Common in apartments, mild climates.

5. Radiant Floor Heating

Hydronic (PEX tubing in concrete/screed) or electric (mats/cables). Heats objects/people directly. Superior comfort, silent, no ducts. Ideal for tile, stone, engineered wood. Slow response.

6. Wood/Pellet Stoves & Fireplace Inserts

Zone heating. EPA-certified stoves: 70–80% efficient. Pellet stoves: automated feed, thermostatic. Require chimney, fuel storage, manual labor. Carbon-neutral if sustainably sourced.

7. Solar Thermal

Collectors heat fluid → storage tank → space heating/DHW. Supplemental only in most climates. High upfront, near-zero operating cost.

Choosing Factors