Sensaphone® has introduced a cellular version of its Sentinel™ system that provides 24/7 monitoring of unattended equipment and remote locations where Internet or Ethernet connectivity is unavailable. When the Sentinel system detects a problem such as leaks, temperature changes and power outages, it immediately sends alerts by phone, text, or email over standard cellular networks provided by AT&T or Verizon.
Rotobrush® International LLC has launched the BrushBeast, which was designed with a 90% increase in vacuum power. The company said that the BrushBeast allows for easy maneuvering into tight areas such as attics and crawl spaces.
Designed with 4-in flanged ports and only three moving parts, Tri-Rotor’s 200 Series pumps are heavy-duty, low-maintenance workhorses for pumping liquid and semi-solid materials with viscosities from 40/4 to 100,000/21625. Flow rates range from 58 to 240 gpm (200 gpm at 430 rpm). The 200 Series includes three head types: variable volume, relief valve, and transfer.
Greenheck has expanded its Air Measuring Damper (AMD) line with the addition of the AMD-TD series of thermal dispersion-based airflow measuring dampers. The AMD-TD series combines the functionality of a highly-accurate thermal dispersion airflow station and a low-leakage control damper to control airflow volumes to a target set point.
Daikin announced that its MXS 2, 3 and 4-port multi-zone heat pumps have been redesigned to improve application flexibility and heating efficiencies. The MXS is ideal for light commercial applications, providing individual comfort for up to four zones using a single outdoor condensing unit.
Lennox Commercial has expanded its light commercial Raider® rooftop unit line to include the new Raider 6-ton unit available in gas/electric and electric/electric configurations and the new 14 SEER units, available in 3-5 tons. The addition of the new Raider 6-ton rooftop unit rounds out the Raider portfolio.
Extech Instruments has unveiled the new RD300, a heated diode refrigerant leak detector that pinpoints leaks of all CFC, HCFC, and HFC refrigerants with three levels of sensitivity to leaks as small as 0.25oz/yr (7g/yr). The ergonomic tool also features a built-in LED work light on the probe tip for dimly lit locations.
Rosenberg has released four new axial fans, complete with shrouds and finger guards for HVAC condenser applications. The fans are designed with profiled aluminum blades with winglet tips that aim to reduce noise and improve fan performance.
Leaning on experience and data from various K-12 cities and projects, the author pursues some less conventional design approaches. They may revolve around radiant heating and/or cooling, but depending on school size and other factors, the smart use of heat recovery, DOAS, and improved central plants could also put a project on the HVAC honor roll.