Sierra Fresh Air Systems
Stressing Environmental Responsibility and Sustainability

Gas Heat Pump - Models XGP096E1NHS, AXGP180E1NHS, AWGP180PHSD



  • Supporting refrigerant & hydronic heat pumps
  • Supports up to 17 (8T) & 33 (15T) air handlers
  • Single Phase Power
  • No back up heat needed
  • Natural Gas
  • Propane (15T)
  • Twin two 15T for 30T supporting 66 air handlers
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 Kaikin Industries, Ltd.

Max # of Indoor Units System Piping Length & type Electrical Power supply Current NOM TON Piping Size Inches FUEL TYPE Total Capacity BTU/h Cooling Heating BASIC UNIT FOOTPRINT LxWxH Weight Minimum Clearances Overhead Front Rear Sides Minimum Clearances Overhead Front Rear Sides
1-17 Equivalent 623 Actual 541 R410A Single phase 208-230 V 20 A 8 Liq Line 3/8 Vap Line 7/8 Fuel 3/4 NG C - 96,000 H - 103,000 55.1"X38.8"X81.8" 1340 lbs O - 78.7"
F - 27.6
R - 19.7
S - 3.9 & 13.8
Heat exchanger for external thermal load, Seismic rail, hail guard, snow hood
1-33 Single phase 208-230 V 20 A 15 Liq Line 5/8 Vap Line 1 1/8 Fuel 3/4 NG LP C - 180,000 H - 205,000 4'8"X3'3"X6'11" 1670 lbs O - 78.7"
F - 27.6
R - 19.7
S - 3.9 & 13.8
Twining kit (30 tons) Heat exchanger for external thermal load, Seismic rail, hail guard, snow hood

GHP Controls

Control System Application Features/Benefits
Navigation Controller Supporting the Sierra systems as a stand alone single zone, group, iTouch manager Up to 16 indoor units are controllable in one group Independent cool/heat setpoints with setpoint range limits Built in weekly schedules Retrofit new construction compatable
Intelligent Touch Manager Supporting the Sierra systems as a stand alone building automated system, intranet, BACnet or LonWorks Supports up to 64 indoor unit groups, 128 Maximum indoor units and 10 outdoor units System total 512 indoor unit groups (1024 Indoor units) Adaptors are available for system expansion
BACnet Interface Integrate Sierra systems with third party building automation systems supporting BACnet protocol Compatible with ANSI / ASHRAE 135 Supports COV (change of Value), Property Array Index, Segmented Requests Low Voltage design
LonWorks Interface Integrate Sierra systems with third party building automation systems supporting LonTalk protocol Gateway Architecture fully scalable Low Voltage design

Home | News | Products | Sales Representatives | Contact