Wood stove heat reclaimers increase heating efficiency by capturing flue heat that would otherwise exit through the chimney. Integrate a heat reclaimer temperature switch to automate fan operation and improve energy savings.
Heat reclaimers install directly in line with the flue pipe of a wood stove. As combustion gases move through the flue, they pass over internal heat transfer tubes. A fan pushes cool room air across these heated tubes and forces warmed air back into the living space. This process can recover up to 30 percent of heat that would otherwise be lost. A properly specified temperature switch ensures the fan operates only when sufficient heat is available.
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How a Heat Reclaimer Works
A wood stove heat reclaimer mounts between sections of flue pipe. Hot exhaust gases flow through the center chamber while heat transfer tubes run through the unit. These tubes absorb thermal energy from the flue gases.
A fan draws cooler ambient air through the tubes. As air passes over the heated surfaces, it absorbs heat and returns to the room at an elevated temperature. This forced convection process increases overall heating efficiency without increasing fuel consumption.
Without temperature-based control, the fan may run continuously, even when flue temperatures are too low to provide meaningful heat transfer. This wastes electricity and reduces overall system efficiency.
The Role of a Heat Reclaimer Temperature Switch
A Senasys ¾ inch snap disc thermostat provides reliable fan control in this application. These switches are rated up to 15 amps at 120 VAC and operate using a fully mechanical bi metal disc.
In a typical configuration:
- The switch closes at 150°F
- The fan turns on and begins circulating heated air
- The switch opens at 110°F
- The fan shuts off as flue temperature declines
This differential ensures the fan operates only within an effective heat range.
A mechanical snap disc design provides high reliability in elevated temperature environments. The switching temperature can be customized to meet specific reclaimer performance requirements.
Installation Inside the Heat Reclaimer
The snap disc installs inside the heat reclaimer housing where it accurately senses internal temperature. Proper placement ensures direct response to flue heat conditions.
When internal temperature exceeds 150°F, the switch closes and energizes the fan motor. As the stove cools and temperature drops below 110°F, the switch opens and de-energizes the fan.
This automatic cycling eliminates manual control and ensures consistent performance.
Energy Savings and Operational Efficiency
A heat reclaimer temperature switch reduces electrical consumption by preventing unnecessary fan operation. Without temperature control, the fan would operate continuously, increasing energy costs and reducing motor life.
By activating the fan only when usable heat is present, the switch:
- Improves overall heating efficiency
- Reduces electrical waste
- Extends fan service life
- Supports stable room temperature
This controlled operation enhances the value of the heat reclaimer system and increases return on investment for homeowners.
Why Choose Our Snap Disc Thermostats
Our ¾ inch snap disc thermostats are manufactured in the United States and 100 percent tested before shipment. We offer:
- Short lead times
- Custom switching temperatures
- Multiple mounting configurations
- Various terminal options
Fully mechanical operation eliminates complex electronics and improves long term durability in high heat environments.
A properly specified heat reclaimer temperature switch ensures that recovered heat transfers efficiently into the living space while minimizing electrical waste.
