A differential bypass valve has been designed to control excess water in zone valve systems. To control excess flow and maintain an automatically regulated flow, the differential bypass valve is
New hot tap mechanical drilling machines are available. According to the manufacturer, with the right hole saw, the user can cut or drill holes for up to 4-inch valves in
The Model 5000 whole-home electronic air cleaner has been redesigned based on contractor feedback, including features that help with installation and maintenance, and reduce callbacks. The inlet/outlet size is the
The DVD titled "Refrigerant Solutions for the 21st Century" provides product and technical information. It features three refrigerants - Hot Shot®, NU-22®, and One Shot® - and the refrigerants they
Decorative grilles (supply, return, and filter), supply grille dampers, and mini duct terminal medallions are available. Designs in the Arts and Crafts, Gothic, French Colonial, Georgian, Italian Renaissance, and Louis
The AAF®-HermanNelson® Model AV unit ventilator is modular in design, which allows for easy access for cleaning and servicing. The company says the higher-capacity cooling coils help reduce energy costs,
WorkTrack Timesheet is a field supervisor module for the construction industry that automates time and job data collection. It allows the collection of regular, overtime, and double-time hours; job numbers;
A new, compact standard enclosure is offered on the 125- to 350-hp VLT Series drives. Two enclosure heights are available - one for units less than 200 hp and the
The second edition of Domestic Central Heating Wiring Systems and Controls is available. The A-Z guide to central heating wiring systems provides a reference manual for hundreds of heating and
The SuperMax all-welded plate heat exchanger is designed as an alternative to shell-and-tube heat exchangers in elevated pressure and temperature applications. The unit is particularly suited to applications having a