Resideo L4080B1352 Aquastat Controller 320734-701 providing a 4-inch intake connection

providing a 4-inch intake connection to pull fresh air from the exterior

Does this system require a separate power source

Ball Bearing Design: Provides robust mechanical support and handles belt tension loads more effectively than sleeve bearing alternatives

the VT3335 offers the mechanical reliability needed for low-pressure steam or hot/chilled water systems

Resideo L4080B1352 Aquastat Controller 320734-701 providing a 4-inch intake connectionThe Resideo L4080B1352 Aquastat Controller is a high limit immersion protective device designed specifically for hydronic heating systems. As a veteran grade boiler control, this unit triggers a break in the electrical circuit upon a temperature rise to the setpoint, preventing overheating by shutting down the burner. It features a technical operating range of 100F to 200F (38C to 93C) with a fixed 8F (4. 4C) differential to ensure stable cycling.