This part is compatible with the following machines: Heatstar HS35FA Forced Air Propane Construction Heater Mr. Heater MH35FA Forced Air Propane Construction Heater The 28082 Thermocouple fits the following Mr. Heater portable heaters, torpedo heaters, salamander heaters, portable low pressure heaters, forced air propane: MH35FA PA35FA The 28082 Thermocouple fits the following Heatstar portable heaters, torpedo heaters, salamander heaters, portable low pressure heaters, forced air propane: HS35FA