Air-Source "Split System" Water Heater


Product Features & Benefits

The Ilios product provides relief from high fuel costs while being aligned with the sustainability goals held by the majority of facilities.

The benefit to you

A dramatic reduction in your energy costs while generating additional free waste heat for other useful applications

The benefit to society

A significant reduction in carbon, greenhouse gas emissions, and the harmful pollutants that contribute to smog

  • Twice the efficiency of a conventional boiler
  • 400,000 to 600,000 BTU/hr of hot water ideal for DHW, pool heating, space heating, re-heat for humidity control and process hot water
  • Hot water delivery temperature up to 160°f
  • Split system, extremely quiet air-source evaporator can be located remotely
  • Ultra-low emissions with near zero criteria pollutants
  • Immense carbon savings, reduce your facility’s environmental impact
Water Heating Re-Imagined

Water Heating Re-Imagined

Our Split System offers increased flexibility because its air-source evaporator package can be installed remotely. The engine driven heat pump, which is contained in a small acoustic enclosure can be located within a building's mechanical space while the quiet air-source evaporator package can be installed on a roof, or in any outdoor space. The outdoor evaporator component is connected to the indoor heat pump via refrigerant lines, therefore eliminating all freeze protection issues in colder climates. All of the water being heated remains inside the conditioned space eliminating the need for a costly isolation heat exchanger and additional pumps, which simplifies installation and increases efficiency by being able to operate at a lower delivery temperature.

Cutting Edge Technology

All of our Ilios gas heat pumps use cutting edge technology to deliver the most efficient water heater in the world. By recovering energy normally wasted by other water heaters, Ilios customers reap the benefits of significant savings year after year.


The most common applications for the Ilios gas heat pumps are facilities with a simultaneous need for heating and cooling including athletic facilities, pools, food and beverage processing plants, laboratories, bottling plants, hotels, and multi-unit residential buildings.


Ultera Emissions Control

Ultera® -ultra-low emissions system reduces the emissions of harmful criterial pollutants (including, CO, NOx, and hydrocarbons) to near-zero fuel-cell equivalent levels - making Ultera-enhanced equipment compliant with the strictest air quality regulations in the country. The Ultera system can be selected for any of our products or purchased as a retrofit for your already existing natural-gas fueled system.

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Load Modules and Engineered Accessories

Our factory-engineered accessories and load modules are customized for your site and help ensure a speedier and smooth equipment installation process. Over time, your equipment runs better with our accessories as they are designed to allow for easy maintenance by our expert service technicians, for the full life of the unit.

CHPInsight - Powered by GE

Customers may opt to equip their CHP units with our custom CHPInsight software to enhance their equipment's performance. Powered by GE's Equipment Insight real-time, cloud-based monitoring solution, CHPInsight monitors and analyzes operating data to ensure your equipment consistently maintains peak performance, optimizing runtimes to deliver maximum value for customers. With our custom dashboard, CHPInsight allows customers to view in real-time their current and historic equipment performance, monetary savings, greenhouse gas reduction, etc. With the majority of our customers selecting long-term maintenance agreements, having the most advanced, reliable equipment monitoring and diagnostic solution protects your valuable equipment for the long-term.

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Turnkey Lite Solutions

Turnkey Lite Solutions

Custom designed with your facility in mind, our factory engineered accessories, load modules and building integration skids are built by our cogeneration experts and shipped to your site pre-assembled – speeding installation and ensuring your cogeneration equipment will operate optimally, right from day 1 and for decades to come.

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Take Advantage of Government Incentives

Every one of our products qualifies for various incentives based on territory and application site type. Our products will also help your facility qualify for LEED green building-type certifications.

Installation Services

Choosing our turnkey installation service ensures your equipment installation will be smooth and your equipment will be optimized for a long and profitable operating life. Choose from our full turnkey solutions or a light package of engineered accessories.

Our turnkey installation service is available on all products and includes


System Design

Factory-engineered Accessories

Learn more about our Installation Process