Krueger-HVAC now offers five different models of blower coils that are divided into three different groups: Standard, Small Footprint, and Modular. The new models include KBH (standard, horizontal blower coil), KBV (standard, vertical blower coil), KSB (small footprint, vertical blower coil with rear return), KSL (small footprint, vertical blower coil with bottom return), and KBM (modular blower coil).
Johnson Controls launched a new line of Coleman® rooftop units that eliminate the need to install curb adaptors, reducing installation time and costs. Curb adaptors are typically required when a new unit does not identically match the existing unit’s footprint. The exact-fit-replacement Coleman® Peak™ rooftop units feature a footprint that fits directly on footprints of other manufacturers’ units, eliminating the need for a curb adapter.
Available in the 15- to 25-tonnage range, the new Trane® Foundation™ light-commercial rooftop units feature a dual-footprint design that can directly replace up to two-thirds of existing units without adaptor curbs.
Mitsubishi Electric has updated its VRF WR2- and WY-Series Modular Water Source Units. Both the WR2- (heat recovery) and WY-Series (heat pump) are available in smaller and lighter units with plate type heat exchangers and both systems operate in either cooling or heating modes.
Carrier has released the second size range of its WeatherExpert™ Series, the company’s highest efficiency commercial rooftops. Models are available from 6- to 23-tons; adding to a current model line-up that includes 3- to 5-ton units. The WeatherExpert line has Integrated Energy Efficiency Ratio ratings up to 21.0. This exceeds the Consortium of Energy Efficiency tier II performance criteria, which many utilities use for rebates.
Mitsubishi Electric updated its variable refrigerant flow WR2- and WY-Series Modular Water Source Units. Both the WR2- (heat recovery) and WY-Series (heat pump) are available in smaller and lighter units with plate type heat exchangers, and both systems operate in either cooling or heating modes.
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.