Resideo FV147 Air Vent

The Resideo FV147, frequently specified as the Honeywell FV147, is a high-performance automatic air vent designed for critical air elimination in hydronic heating and cooling systems. Featuring a compact, low-profile design, this 1/8" NPT air vent utilizes a solid brass body and cover to withstand demanding mechanical room environments. The internal high-temperature polypropylene float provides reliable buoyancy and operation in system temperatures up to 240°F, while the assembly supports a maximum operating pressure of 150 psi. For the veteran installer, the Maxivent air vent is the go-to solution for purging trapped air in residential and light commercial loops, preventing flow noise and localized corrosion. Its 1/8" MNPT connection allows for direct mounting on radiators, baseboard units, or air scoops where space is at a premium. By maintaining a clear path for air discharge, this brass air vent ensures consistent heat transfer and protects pumps from cavitation-induced damage.

• Durable Brass Construction: The corrosion-resistant brass body ensures long-term integrity in closed-loop hydronic systems.
• High Heat Tolerance: Rated for up to 240°F, making it suitable for high-mass boiler systems and solar thermal applications.
• Space-Saving Profile: The low-profile design fits into tight clearances where standard vents might obstruct paneling or piping.
• Optimized Air Removal: Features a high-capacity air path to maximize air elimination efficiency during system startup and operation.
• Versatile Compatibility: Designed for use in both residential and commercial heating and cooling circuits.

Is the Resideo FV147 compatible with glycol-based systems?
Yes, the solid brass and polypropylene components are typically resistant to common hydronic additives, though water chemistry should always be monitored per the system design.

Where should this automatic air vent be installed for maximum efficiency?
For peak performance, place the FV147 Maxivent at the highest point of the piping or on air scoops located where the water velocity is lowest and temperature is highest.

Can the FV147 handle high-pressure commercial loops?
The unit is rated for a maximum safe operating pressure of 150 psi, which covers most residential and light commercial hydronic applications.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.