BME joined forces with Southwest Gas to design, develop and demonstrate natural gas driven heat pump systems designed specifically for the desert southwest and remote location installations. The Department of Defense and the Department of Energy joined forces in 2006; products have been demonstrated at multiple military base installations.
| 8, 15 Ton Gas Heat Pump (GHP) | Models AXGP096E1NHS, AXGP180E1NHS, AWGP180PHSD |
 | The Gas Heat Pump by Sierra is the latest model from Mestex to use an internal combustion engine, to power the AC’s internal components instead of utility supplied electricity. The engine supports both Natural Gas and Propane configurations and has delivered electrical savings, both at time of construction and on a monthly basis, for hundreds of institutions nationwide. The Sierra Gas Heat Pump offers three configurations for delivering BTUs to a building; either using a Daikin VRV® Air Handlers, Sierra Hydronic Heat Pump Energy Exchanger, or select Sierra DOAS models. *VRV is a trademark of Daikin Industries, Ltd. |
| GHP Energy Exchanger – Air-Water Systems (AWS) | Model AWS20E1 |
 | The Sierra AWS (Air Water System) Heat Pump Energy Exchanger enables the Sierra GHP to deliver BTUs via a buildings existing water systems. Retrofits of 2, 3 or 4 pipe and multi-zone hydronic heating and cooling systems start here. The exchanger enables select SpacPac, Dadanco Active Chill Beams, and Sterling Hydronic HVAC components are complementary products depending upon your implementation details. |
| GHP Variable Refrigerant Flow (VRF) | Models AQ, DQ, EQ, FQ, HQ, MQ, NQ, TQ, UQ, ZQ |
 | VRF (variable refrigerant flow) ductless and ducted air handlers are used with Sierra products to meet the challenge of heating and cooling by providing independent temperature control in multi-zoned buildings |
| DOAS | Split System – Model ZFR |
 | The ZFR delivers high quality outside ventilation air for comfort and Indoor Air Quality in commercial buildings, with dehumidification, heating and filtration (up to MERV15) in a split system configuration. The ZFR allows engineers to satisfy load requirements more efficiently with higher ventilation rates while permitting conventional HVAC equipment to operate as originally designed. |
| DOAS | Integral Package Unit – Model DCV |
 | The new Sierra DCV is the most cost-effective way to provide cooling, heating and high-efficiency filtration (up to MERV15) of outside air for commercial building ventilation in a packaged unit. The DCV is the only packaged DOAS unit that delivers full ASHRAE 62.1 compliance, and up to 6 LEED points in a single product! |
| EVAP | Evaporative Cooling System – Model ZEC |
 | The ZEC evaporative cooling system is one of the most environmentally friendly ways to improve working conditions and productivity. Evaporative systems can cool at 20% the cost of mechanical air conditioning. The innovative Turbo-CEL™ evaporative cooling media provides efficient cooling using water, not refrigerants, reducing your carbon footprint. Capacities up to 23,000 cfm are available. |
| EVAP | Indirect/Direct Evaporative Cooling System – Model Aztec |
 | The Sierra Aztec evaporative cooling system is the ultimate in energy efficiency, providing impressive reductions in supply air temperatures rivaling mechanical refrigeration. The Aztec uses a first stage integrated stainless steel cooling tower and cooling coil to provide cooled air to a second stage direct evaporative section, delivering performance of up to 30 EER. Available in sizes from 1500 to 37000 cfm, the Aztec is also available with a heating section up to 1.4 mbtu input. |
| DF-HEAT | Direct-Fired heating system – Model ZDF |
 | The ZDF Direct Fired systems are flexible, cost-effective units for indoor or outdoor space heating, make-up air, and ventilation applications. Superior tube frame construction and stainless steel burners deliver decades of reliable service. The ZDF from Sierra can provide up to 16,000 CFM of warm, fresh and clean air to your building. |