The Goodman® brand GSZC18 16 to 18 SEER Heat Pump uses the chlorine-free refrigerant R-410A and features energy efficiencies and operating sound levels that are among the best in the heating and cooling industry. The GSZC18 contains a, High-efficiency two-stage scroll compressor, which provides improved temperature and humidity control. This unit is designed for the consumer who desires superb comfort and quiet operation.

All Goodman 16 to 18 SEER heat pumps must be installed with a bi-flow thermostatic expansion valve. This valve is installed in front of the indoor evaporator coil inline with the line set piping.

This heat pump requires an indoor air handler or evaporator coil as part of a complete system. What tonnage coil or air handler should you use? It depends on two factors about the outside portion of the heat pump system: 1) the tonnage, and 2) the efficiency rating (listed as "SEER"). Usually, high efficiency heat pumps are required to use a larger tonnage evaporator coil than the tonnage of the outside heat pump. (For example, a 2 ton heat pump might be paired with a 3 ton or 3.5 ton evaporator coil.) To find the specific coils or air handlers that are recommended by Goodman for this heat pump, please click on the Accessories tab above. (Also, you can view Goodman's specifications sheets at the Documents tab above).

In order to achieve the 18 SEER efficiency this heat pump must be installed with the manufacturer recommended evaporator coil, a Goodman variable speed furnace, variable speed air handler, or variable speed modular blower and thermostatic expansion valve (TXV). (See the Accessories tab above for most compatible products, or Goodman's spec sheet found under the Documents tab above to verify heat pump efficiency with particular equipment combinations.) An 18 SEER system will reduce your electric bill approximately 12% - 14% more than a 16 SEER system.

Need help putting a complete heat pump system together? Use our easy System Selector and we’ll do it for you!

This is a communicating piece of equipment and to achieve full efficiency and functionality it must be paired with a Goodman communicating furnace, air handler, or modular blower with evaporator coil. If pairing this with an alternate indoor unit you must verify that the indoor unit is compatible with a 2 stage cooling system and you will need part 0130M00485 for the installation. 

If pairing this unit with a Goodman communicating indoor natural gas/lp furnace in a dual fuel installation all of the staging is done through the communication between the furnace and heat pump and no specialized thermostat is required. If pairing this with any other fossil fuel furnace you will need a dual fuel capable thermostat such as the Honeywell TH8321WF1001 or TH6320WF2003.

Please note that this heat pump comes pre-charged with R-410A liquid refrigerant and by Federal law cannot be released to the atmosphere. You can purchase this equipment without being EPA certified, and if you are mechanically inclined you may perform about 90% of the equipment installation yourself. However we strongly recommend to have a professional heating/cooling contractor do the final part of the installation including managing the refrigerant. An HVAC contractor has the tools and know-how to do this work. Also, having a contractor perform the final startup and inspection of this heat pump validates your warranty with Alpine.

Standard Features:

• R-410A chlorine-free refrigerant
• High-efficiency two-stage scroll compressor
• High density foam compressor sound blanket
• ComfortAlert diagnostics
• Comfortbridge Communications System compatible
• Low pressure switch
• Fully charged for 15' line set length
• Factory installed filter dryer
• Liquid refrigerant return protection
• Highly efficient condenser fan motor
• Copper tube / enhanced aluminum fin coil
• AHRI Certified; ETL Listed

Cabinet Features:

• Goodman® sound control top design
• Wire fan discharge grille
• Steel louver coil guard
• Baked on powder-paint finish
• Rust resistant coated screws
• Compact footprint
• Top and side maintenance access
• Single panel access to controls with space provided for field-installed accessories
• When properly anchored, meets the 2001 Florida Building Code unit integrity requirements for hurricane-type winds

Considering purchasing a furnace, air handler, or coil with this condenser? Visit our Central Heating & Cooling Systems page to find AHRI certified systems.