Single & dual capacity. Consistent comfort.

The York® Affinity™ YAF is one of the most efficient dual capacity geothermal heat pumps available and offers a level of comfort and savings that’s much greater than any traditional system. The YAF is available in a number of sizes and configurations so it’s the perfect fit for any application.


Geothermal heat pumps are much more efficient than traditional heating and cooling systems. The York® Affinity™ YAF is rated with an amazing 28 EER and 4.8 COP, which makes it one of the most efficient dual stage units on the market. Efficiency translates into savings.


One York® geothermal heat pump will provide heating, cooling, and supplemental hot water for your home. A variety of sizes and configurations are available, so no matter your home or climate, a geothermal heat pump will work for you.

Cost effective

Geothermal heat pumps are so efficient that any added cost over traditional equipment is usually recovered in just a few years. And because they have a lifespan of 20-25 years, your investment will last longer and your return on investment will grow year by year.

Environmentally responsible

Since our units don’t burn expensive, polluting fossil fuels, they’re the most environmentally responsible options available today. Replacing a furnace and/or air conditioner with geothermal can minimize acid rain threats, air pollution, and the greenhouse effect.


No combustion or flames are used to operate a geothermal heat pump, making it a safe choice for your home and family. Our systems merely move heat to and from the ground rather than by burning natural gas, propane, or oil.

Affordable peace of mind

York® Affinity™ YAF units come with warranties up to 10 years for parts and labor allowances. Other options are available, so see your York® Contractor for details.

Dual capacity compressor

Allows the unit to operate at two speeds rather than running at one high speed all the time. The Affinity™ YAF can operate more frequently in a lower speed to satisfy the needs of your home while saving energy.


Sophisticated Aurora controls provide easy-to-use but extensive troubleshooting capabilities as well as advanced two-way communication between components. Expanded capabilities include communicating controls, extended hot water generation, and more.

Blower motor

An ECM variable speed blower motor operates at only the speed needed for the greatest in efficiency and savings. A standard PSC or high efficiency 5-Speed ECM blower motor are also available.

Aurora Interface Diagnostic port

Technicians can diagnose and service your system without even opening the unit by utilizing the external communication port and interface tool.


Lengthen the lifetime of your system and compressor with the optional IntelliStart soft starter. This accessory decreases start-up amperage by up to 70% and reduces light flicker.

Coated Coaxial Heat Exchanger

Coaxial heat exchanger life is extended by our proprietary coating that protects against condensation at temperatures below 50°F.

Hot Water Generation

A hot water assist option preheats your water and delivers it to your hot water heater. The longer the unit operates, the greater the amount of hot water generated.

All Aluminum Air Coil

Aluminum air coils are standard in the YAF providing durability and extended system life.


A professional grade powder-coat finish provides long-lasting beauty and protection. The unit is fully insulated with cleanable foil-backed insulation that ensures quiet operation.

Filter and Filter Rack

A high performance MERV 11 pleated filter comes standard while an optional MERV 13 pleated filter is available. The filter rack can be easily converted for use with 1” or 2” filters.


All York® geothermal units utilize R-410A refrigerant, which is friendly to the environment.

Dual Capacity Compressor
Proprietary Coating
Fan Motor
ECM or PSC Blower Motor
Aurora Controls
Hot Water Generation 
Optional - Internal mount pump
MERV 11 filter
Up to 10-Year Parts and Labor Allowance
2-6 ton
Efficiency Rating
28 EER / 4.8 COP
Energy Star
Most Models