A new packaged heat pump from the Coleman brand of Johnson Controls is available in 3- to 8.5-ton capacities. Its exact-fit replacement design matches footprints of other manufacturers’ units and the company says it reduces installation time, cost, and complexity by eliminating the need for a curb adapter.
Victaulic says it has developed the first grooved piping system for saturated steam and condensate piping. Designed for use on commercial and industrial steam applications, the system features the Style 870 rigid coupling, a full line of fittings, and pipe preparation tool roll sets to process the new OGS-200 groove profile.
Fujitsu has introduced its new Airstage VRF system, the J-II Series. The J-II single-phase VRF is a heat-pump, serving ambient heating and cooling applications in a 3- to 5-ton size range, making it ideal for large residential and small commercial installations. The J-II offers up to 19.8 SEER and 11.4 HSPF.
Johnson Controls introduced seven new Coleman® duct-free mini split product lines, offering more indoor options, additional multi-zone products, light commercial applications, and low ambient options available throughout the United States and Canada.
The Omega HHAQ-107 meter is ideal for making general measurements of mixed gas volatile organic compound (VOC) levels as part of an IAQ maintenance program. Since people spend most of their time inside homes, schools, and commercial buildings, measuring the health and comfort in the air is important.
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.
The model 14359 UL/C-UL Listed Class 2 Transformer from Foster Transformer accepts line voltages of 120, 208, 240, and 480 V, 50/60 Hz, allowing near universal application. Its 24V, 75 VA rating provides ample capacity for most low voltage control applications, and its integral wiring compartment simplifies field installations, according to the company.
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.
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.