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A gas-powered sauna uses a propane or natural gas heater instead of an electric element or wood-burning stove. The result is fast heat-up times, powerful BTU output, and no need for the high-amperage electrical circuits that large electric heaters require. The outdoor sauna kits on this page pair premium cedar sauna structures with Scandia gas heaters — the only gas sauna heaters manufactured in the United States. Free shipping on every order, 0% APR financing available.
Looking for just the heater? See our gas sauna heaters collection. Want to understand gas heating before you buy? Read our complete guide to gas sauna heaters.
No high-amp electrical service required — This is the biggest practical advantage. Electric sauna heaters in the 6–9kW range require a dedicated 240V, 30–50 amp circuit, and larger commercial heaters need even more. If your outdoor sauna location doesn't have electrical service — or running a dedicated circuit would be expensive — a gas heater eliminates that requirement entirely. You need a gas line (natural gas) or a propane tank, but no heavy electrical work.
High heat output and fast recovery — The Scandia 40K BTU heater covers sauna rooms up to 616 cubic feet. The Scandia 80K BTU model handles even larger commercial-size rooms. Gas heaters bring saunas up to temperature quickly and recover fast when you throw water on the stones or open the door, making them excellent performers in cold climates where outdoor saunas lose heat to the environment.
Lower operating cost in many areas — Depending on your local utility rates, natural gas or propane can be significantly cheaper to run than electricity. The Scandia gas heater uses approximately 0.5 pounds (0.12 gallons) of propane per hour, making ongoing fuel costs modest even with daily use.
Excellent steam production — Scandia gas heaters feature the largest rock tray in the industry with up to eight gallons of water capacity. That means heavy, sustained löyly (steam) when you pour water over the stones — a key factor for anyone who wants an authentic Finnish sauna experience.
Every gas sauna kit on this page uses a Scandia gas heater. Scandia has manufactured sauna heaters in the USA since 1964 and their gas models are the industry standard — used in health clubs, spas, and gyms nationwide. Both models are floor-mounted with 321 stainless steel fire chambers (the same alloy spec used in jet engine afterburners), brushed 304 stainless steel exterior shells, and included sauna stones.
Scandia Model 240 — 40,000 BTU — Heats sauna rooms up to 616 cubic feet. This is the right size for most residential outdoor saunas, including 4–6 person barrel, cabin, and pod saunas. Comes with "G" wall controls (60-minute timer and mechanical thermostat). Available in natural gas or liquid propane configurations with standing pilot light or piezo ignition.
Scandia Model 280 — 80,000 BTU — Designed for larger or commercial-size sauna rooms that exceed the 40K model's capacity. Same commercial-grade construction and control options. If you're building a large cabin sauna or a commercial installation, this is the model to spec.
Both heaters can be configured for propane (LP) or natural gas (NG) — select your fuel type when ordering. Not sure which BTU output you need? Use our sauna heater sizing calculator or call us at (360) 233-2867.
Propane (LP) — Best for remote locations, properties without a natural gas line, and situations where you want a self-contained fuel source. A standard propane tank sits near the sauna and connects via a gas line. Propane is widely available and can be delivered anywhere. This is the more common choice for backyard and cabin saunas.
Natural gas (NG) — Best for permanent installations where a natural gas line is already available or can be extended to the sauna location. Natural gas provides unlimited fuel supply without tank refills and is typically cheaper per BTU than propane. More common in commercial installations and suburban homes with existing gas service.
Gas sauna heaters occupy a middle ground between electric and wood-burning. They offer the convenience of a thermostat and timer (like electric) with the independence from high-amp electrical circuits (like wood-burning). Here's how they compare:
Gas vs. electric — Gas heaters don't require a dedicated 240V circuit, heat up faster in cold conditions, and often cost less to operate. Electric heaters are simpler to install (no venting required), don't need a fuel source, and can be wall-mounted to save floor space. If you have adequate electrical service already in place, electric is the easier path. If you don't, gas saves you the cost of running heavy electrical to your sauna. For a deeper comparison, read our electric vs. wood-burning heater guide (which also covers gas).
Gas vs. wood-burning — Gas heaters give you push-button convenience with thermostat control, no ash to clean, and no firewood to manage. Wood-burning stoves offer a completely off-grid experience with no gas line or propane tank needed, plus the ritual and ambiance of a real fire. Gas is the practical choice; wood is the experiential choice. See our wood-burning sauna kits if you prefer that route.
Professional installation required — Gas sauna heaters must be installed by a licensed HVAC professional. This is non-negotiable — gas appliances involve combustion, venting, and fuel line connections that require proper certification for safety and code compliance.
Venting — Gas heaters require exhaust venting to the outdoors. Scandia heaters include a flu-cap or draft hood and support both vertical venting (through the roof) and direct venting (through a wall). Your installer will determine the best venting configuration based on your sauna structure.
Combustion air — Gas heaters need fresh air intake for combustion. Your sauna room must have an adequate fresh air supply, which your HVAC installer will address during the install.
Gas supply — You'll need either a natural gas line run to the sauna location or a propane tank installed nearby. For propane, most residential saunas work fine with a standard tank. For natural gas, your installer will size the gas line based on BTU demand and run length.
Wall thickness — Scandia gas heaters are designed for thru-wall installation (the burner assembly feeds through the sauna wall). If your sauna wall is thicker than 5.5 inches, you'll need a Scandia gas extension kit — contact us and we'll confirm whether you need one based on your sauna model.
Foundation and site prep — Like any outdoor sauna, you need a flat, level base. See our outdoor sauna foundation guide for options including gravel pads, concrete pads, and deck platforms.
Gas heaters typically bring an outdoor sauna to temperature in 30–45 minutes depending on the sauna volume, outdoor temperature, and insulation quality. This is generally faster than electric heaters of equivalent capacity, especially in cold weather when the BTU advantage of gas is most apparent.
Scandia gas heaters are configured for one fuel type at the factory. Conversion kits may be available depending on the model, but it's best to select the correct fuel type upfront. If you're unsure which fuel type to choose, call us and we'll help you decide based on your property setup.
Gas heaters require exhaust venting but not a traditional chimney. They use either a vertical vent (through the sauna roof) or a direct vent (through a wall). The venting components are included with the Scandia heater. The venting requirements are less complex than a wood-burning chimney, but they still must be installed by a professional.
Yes, when properly installed by a licensed HVAC professional. Scandia gas heaters include a mechanical thermostat to prevent overheating, and the fuel system includes standard safety shutoffs. Gas sauna heaters are used in commercial spas, gyms, and health clubs throughout the country with excellent safety records. The key is professional installation and proper venting — this is not a DIY project.
Gas heaters can be installed indoors with proper venting and combustion air supply, but it adds complexity. Most residential gas sauna installations are outdoor builds where venting is more straightforward. Consult with a licensed HVAC professional for indoor gas heater installations.
Our complete guide to gas sauna heaters covers everything from sizing and fuel selection to installation requirements and operating costs. For help choosing the right sauna kit and heater combination, call or text us at (360) 233-2867.
Shop more: Gas Sauna Heaters · Outdoor Traditional Saunas (Electric) · Wood-Burning Outdoor Saunas · Barrel Saunas · Cabin Saunas · All Sauna Heaters
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