Dedicated hot water generation

The York® Affinity YAW with OptiHeat technology is our geothermal solution for boiler replacement. Capable of delivering up to 150 degrees leaving hot water, this system is perfect for baseboard radiator systems, underfloor radiant applications, overfloor radiant applications, and fan coils.


Geothermal heat pumps are much more efficient than traditional heating and cooling systems. The York Affinity YAW with OptiHeat Vapor Injection technology is rated with an efficient 16.1 EER and 3.3 COP.


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.

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. Utilizing geothermal can minimize acid rain threats, air pollution, and the greenhouse effect.


A York Affinity YAW with OptiHeatprovides consistent comfortable heating when used in radiant floor applications and is also perfect for 100% domestic hot water use as well as a boiler replacement.

Affordable peace of mind

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

OptiHeat Vapor Injection

This technology incorporates an additional heat exchanger that diverts excess heat and reinjects it into the system. This creates exiting water temperatures of up to 150 degrees and optimum compressor operating conditions. Smaller loads are required and result in the ultimate in efficiency.

Aurora Advanced Controls

Communicating Aurora controls simplify diagnosis and setup by utilizing the Aurora Interface Diagnostic (AID) Tool. Aurora Controls offer two-way communication between components, smart operating logic, and robust troubleshooting capabilities.


This optional soft starter reduces start-up amperage by 60% of normal draw to reduce noise, eliminate light flicker, and increase compressor life.


High efficiency scroll compressors are used with vapor injection technology. All compressors are double isolation mounted for extra quiet operation.

Field Switchable Control Box

The Affinity YAW with OptiHeat can be oriented in two different ways so your dealer can move the control box if needed for your home. This increased versatility makes the system more accessible and easier to install and service.

Insulated Coaxial Heat Exchangers

Affinity™ YAW heat exchangers are coated with foam insulation which increases both the efficiency and the consistency of our heat exchangers. Robotic application ensures an even, airtight seal.


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

Vapor Injection Scroll
Fan Motor
Aurora Advanced Controls
Hot Water Generation 
Up to 10-Year Parts and Labor Allowance
3-6 ton
Efficiency Rating
16.1 EER / 3.3 COP
Energy Star