Rinnai introduced the Demand Duo™, a commercial hybrid water heating system. The system combines highly-efficient heat exchanger technologies from Rinnai’s recently-launched 199-Btu, Energy Star-certified C199 condensing commercial tankless water heaters with a 119-gallon tank designed to handle the demands of businesses.
Kohler Power Systems added a new model to its line of diesel-powered mobile generators. The 55REOZT4 offers customizable options to meet the varying needs of end users. Built to withstand the elements and run long hours in prime and standby applications, the new generator model meets all emissions standards.
Hazloc Heaters™, a manufacturer of industrial unit heaters for hazardous and severe-duty locations, introduced the second generation of the Hydronic High Performance (HHP2) series of heat-exchanger unit heaters. The HHP2 series of heat-exchanger unit heaters is designed for rugged industrial applications in steam, hot water, glycol, or other fluid circulating heating systems.
Pentair has now increased the protection level of its Hoffman PROAIR air conditioners NEMA 4 and NEMA 4X to IP66, especially for use in harsh and corrosive environments. In the food and beverage industry, as well as in highly corrosive environments, equipment is exposed to higher requirements. In cooling such facilities, the company says its Hoffman PROAIR air conditioners offer ideal protection.
RectorSeal® Corp. introduced SureSeal® Vent-Guard, a vent stack device for eliminating toxic sewer gas and odor egress and migration to nearby rooftop HVAC system outdoor air intakes. The patent-pending Vent-Guard is available in three sizes designed to fit 2-, 3-, and 4-in-diameter commercial building plumbing vent stacks and restaurant grease interceptor vents.
Technical Systems (TSI), a division of RAE Corporation, has released the new Adiabatic Pre-cooling Evaporative X-change (APEX™) cooling technology. The company reports the APEX combines evaporative cooling technology with the simplicity of air cooling to deliver low-maintenance, highly efficient cooling systems. APEX is ideal for data centers, hospitals, colleges and universities, and more.
GF Piping Systems has introduced the Type 514-519 High Flow Diaphragm Valve Series. The valves are designed to provide a true break-through for weir style valves. The valve features an optimized, turbulence-free flow geometry that offers significantly increased flow rate performance and lower energy consumption, according to the company. These features expand the valve’s suitability for applications where diaphragm valves were previously not considered due to flow restriction.
The Grundfos PACOpaQ® is a fully-integrated and compact HVAC packaged pumping system designed for chilled and hot water distribution, condenser water, geothermal loop, district heating and cooling, and many other water-based systems. The system pairs centrifugal pumps with the intelligence and efficiency of a dedicated HVAC control, which automatically determines the most efficient speed and optimum number of pumps needed to meet desired flow and pressure.
Daikin Applied has expanded its Rebel™ commercial packaged rooftop systems from 3 to 15 tons to include 16- to 28-ton sizes, enabling owners of larger buildings to decrease the number of units required, reducing overall installation costs.
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.