🔥 Sure Flame 400,000 BTU Dual-Fuel Construction Heater – Model S405

Heavy-duty industrial heater designed for rugged job site or warehouse use. Sure Flame Model S405, capable of burning either propane or natural gas (gas selector valve included). Built-in electric motor and fan assembly with 115V plug, Start/Stop switch, and onboard operation instructions.

Specs:

• ✅ Model: S405 – Serial #15390

• 🔥 Max BTU Output: 400,000 BTU/hr

• ⚙️ Orifice Size: 42 DMS x 18

• ⚡ Power: 115V, 60 Hz, 12A, single phase

• 🌡️ Temperature Rating: -40°F minimum

• 🔁 Gas Selector: Propane / Natural Gas

• ⛽ Max Inlet Pressure: 14" WC (both gases)

• 🔧 Manifold Pressure: Propane: 1.3" WC | Natural Gas: 4" WC

• 📏 Clearance Requirements: 12' front / 5' top / 2' sides / 6' from LP gas containers

Perfect for large-area heating needs—factories, warehouses, or job sites. Heavy-duty steel frame with carry handles and adjustable support legs.