Description: Gas Heater; Gas Heater Turned On High; Constant Hum And Rumble. Close Perspective. Furnace, Fan.

Description: House oil heater (burner) hum.

Description: Household Heater Space Heater On Run Off Low Appliance.

Description: Household Heater Space Heater On Run Off High Appliance.

Description: Electric Heater, Fan, Start, Stop x2.

Description: Household Heater Space Heater Run High Loop Appliance.

Description: Household Heater Space Heater Run Low Loop Appliance.