If propane, sail switch, or control board work is outside your comfort zone, stop here and open the request below.
This article compares RV furnaces and electric space heaters, highlighting their respective fuel sources, efficiency, and safety considerations. While furnaces use propane and are suitable for boondocking, electric space heaters are more cost-effective for those on shore power, provided safety measures are observed.
Generated from this page. Always verify technical specs.
| Furnace | Space Heater (Electric) | |
|---|---|---|
| Fuel | Propane | 120V electricity |
| Electrical load | 12V only (blower, igniter) | ~1,500W (12–15A on 30A service) |
| Venting | Combustion vented outside | None (no combustion) |
| Cost (approx) | ~$2–4/gal propane, 0.1–0.2 gal/hr | ~$0.12–0.20/kWh, ~1.5 kW |
| Propane usage | High when cold | None |
| Boondocking | Yes (needs propane + 12V) | No (needs generator/inverter) |
| Shore power | Yes | Yes—saves propane |
When plugged in, an electric space heater can heat a small RV for less than running the furnace—and you conserve propane. When boondocking, the furnace is your main option unless you have a large inverter/generator. See our RV heating and cooling guide, how to stay warm in winter, and furnace troubleshooting if heat fails.
Furnaces are designed for RVs—combustion is vented outside. Electric space heaters must have tip-over and overheat protection. Keep away from curtains and bedding. Never use unvented propane heaters (buddy heaters, etc.) indoors—carbon monoxide risk.
An adjustable ceramic space heater with thermostat and tip-over shutoff is a solid choice for supplementing heat on shore power. See best RV portable heaters when available.
Furnace inspection, propane check, skirting prep, condensation management. Use before cold-weather trips.
Download ChecklistIf heating system issues persist—furnace won't fire, space heater trips breakers, or you need electrical upgrades—a licensed RV or HVAC technician can help. Request local RV HVAC service below.
On shore power, electric space heaters often cost less than burning propane. When boondocking, the furnace is typically the only practical option.
Electric space heaters with tip-over and overheat protection are safe when used correctly. Never use unvented propane heaters indoors.
Yes, when on shore power. It saves propane. When boondocking, the furnace is usually the only option unless you have significant inverter/generator capacity.
If you're diagnosing RV electrical or appliance problems, these guides may help:
Diagnosing RV electrical and mechanical issues often requires a few basic tools. Recommended tools used in these guides:
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Last updated: March 2026 · Reviewed for technical accuracy
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