External in line thermostat, fits kerosene forced air heaters, saves energy dollars by automatically maintaining any selected temperature between 40 & 90 degrees, no installation, just plug into electrical outlet, for kerosene/diesel forced air heaters without a built in thermostat.

• Turns your heater into a T-Stat model in seconds
• Save up to 40% on fuel costs
• Plugs into a standard 120V grounded outlet
• Easy temperature adjustment
• Compatible with all sizes of kerosene forced air heaters