Braeburn Systems 505 Heat Only Mechanical Thermostat

Product Description

The BRAEBURN SYSTEMS 505 is a single-stage, heat-only mechanical thermostat designed for residential heating systems operating on 24-volt or millivolt power. Mercury-free construction meets modern environmental standards without sacrificing reliable, straightforward operation. The 505 covers a temperature range of 50 to 90 degrees F and includes a positive off switch, giving installers and occupants direct control over system shutoff. This thermostat suits HVAC technicians and heating professionals who need a no-frills, code-compliant replacement for mechanical controls in low-voltage or millivolt heating applications.

The 505 is compatible with conventional 24-volt single-stage heating systems as well as millivolt systems such as those used with gas wall heaters, floor furnaces, and gravity furnaces. Its single-stage heat-only design makes it appropriate for applications where cooling control is not required. Typical installations include residential and light commercial heating systems where simplicity and reliability are the primary requirements.

Key Features

• Mercury-free mechanical design meets current environmental and disposal standards
• Compatible with 24-volt and millivolt heating systems in a single unit
• Temperature range of 50 to 90 degrees F covers standard residential heating setpoints
• Positive off switch provides direct system shutoff without removing power at the breaker
• Single-stage heat-only configuration simplifies wiring in heating-only installations

Compatibility

Designed as an OEM-style replacement for single-stage heat-only mechanical thermostats used in conventional 24-volt or millivolt heating systems, including gas wall heaters, floor furnaces, and gravity furnace applications.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified heating professional. Shut off power to the heating system at the breaker or disconnect before removing the existing thermostat and making any wiring connections. Millivolt systems produce a small self-generated voltage, so confirm system type before selecting wire terminals. Mount the thermostat on an interior wall away from drafts, direct sunlight, and heat sources to ensure accurate temperature sensing.