Heat-pump systems
Tranquility TRW vertical-stack hybrid heat-pump systems can heat or cool, with loop temperatures from 85˚F to 125˚F. A compressor-based cooling cycle uses EarthPure HFC-410A refrigerant. The hydronic heating cycle uses loop water for quiet, dependable heat. When units in the building are cooling and heating, the heat rejected in the loop by units in cooling mode becomes "free" heat for units in heating mode. Unit- or remote-mounted controls are available.
—ClimateMaster
Circle 7

Condensing boilers
Three models have been added to the Triple-Flex line of high-efficiency condensing flexible-watertube boilers. The TF 150, TF 200, and TF 250 offer inputs from 1,500 to 2,500 mbh, with sub-30-ppm nitrogen oxide, utilizing a hybrid metal-fiber burner. The boilers have a minimum thermal efficiency of 90 percent in worst-case operating conditions, such as 160˚F return water and 180˚F supply water at 100-percent firing load. Efficiencies of up to 99 percent are achievable with lower return-water temperatures, such as those found in new buildings.
—Bryan Steam LLC
Circle 8

Replacement motors
The JuggerNaut line of inverter-duty condenser-fan replacement motors for the commercial air-conditioning and refrigeration markets includes Class F insulation for 158˚F maximum ambient conditions, a quick-connect voltage-change module, and a removable rigid base that provides for rigid-base or belly-band mounting. The replacement motors are available in five ratings: 1, 1½, and 2 hp at 1,140 rpm, as well as 1 and 1½ hp at 850 rpm.
—A.O. Smith Electrical Products Co.
Circle 9

Independent valves
Designed to perform control and energy strategies for building-automation systems, ePIV pressure-independent control valves maintain flow regardless of pressure fluctuation. The valves directly measure flow by combining a magnetic flow meter with two-way control to offer regulation, balance, and shutoff. Flow readings are reported back to the controller.
—Belimo
Circle 10

Impellers
Suitable for most air-conditioning, ventilation, and critical applications, RadiCal impellers feature an aerodynamically optimized hybrid construction that provides a continuous flow of air, increasing the aerodynamic efficiency of a fan. Compared with conventional alternating-current fans, the impellers consume 50-percent less energy and ensure 50-percent noise reduction. Compact, the impellers can be integrated into tight spaces.
—ebm-papst
Circle 11

Flue-draft and CO safety monitor
EBC 35 draft controls with carbon-monoxide (CO) monitors help safeguard boiler facilities. An integrated proven draft-switch function ensures the control will lock out boilers within an adjustable time period if sufficient draft cannot be maintained. The CO transmitter's liquid-crystal display monitors CO levels on location. The units' sensors have a minimum two-year life span.
—Enervex (formerly Exhausto)
Circle 12

Split-grounding ring
AEGIS bearing-protection rings protect alternating-current motors by channeling harmful currents to ground. Maintenance-free, the rings’ FiberLock channel prevents the loosening or breaking of conductive microfibers. By preventing bearing damage, downtime, and costly repairs, the rings help make variable-frequency-drive energy savings sustainable.
—Electro Static Technology
Circle 13

Screw compressors
Optimized for low-condensing-temperature applications, CSW Series screw compressors are suited for water-cooled chillers, process cooling, and systems with air-cooled condensers operating under moderate climate conditions. The screw compressors provide energy efficiency, particularly under part-load conditions; they are 30 percent more efficient at part load than standard models.
—Bitzer US Inc.
Circle 14

Scotch boilers
Series 500 four-pass wetback Scotch marine boilers have capacities from 30 to 2,000 hp and 670 to 3,348 MBtuh. Factory-assembled, prewired, and tested, the boilers include independent tube sheets with uniform temperatures, eliminating cracks and premature tube failure.
—Hurst Boiler
Circle 15

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