Viessmann

The Vitocal 100-AW is a complete residential air-to-water heat pump system with an outdoor unit, indoor unit, and 20-gallon steel buffer tank. Ideal for new homes or retrofits, it’s quiet, compact, and highly efficient. Delivered in one kit the Vitocal 100-AW is installation ready makes it easy to upgrade to sustainable, all-electric heating, cooling, and year-round comfort.

National Energy Equipment

GE Appliances ductless mini split heat pump systems deliver year-round comfort with whisper-quiet performance, high efficiency, and sleek design. Perfect for any space—new additions, older homes, or rooms without ductwork—these systems offer customizable temperature control and easy installation. Backed by GE’s trusted innovation and reliability, they’re a smart choice for homeowners looking to upgrade their comfort and energy savings.

Send us pics of your installation. Include a brief description of the particular challenges that you faced with this installation and how you overcame the obstacles. Submissions are limited to one per contractor, per category. Deadline to enter is July 31, 2025. All submissions will be shown at the Modern Hydronics Summit 2025.

There are three categories:

• Commercial installations
• Residential new build
• Residential retrofit

The three winners will also be announced by John Siegenthaler at the Summit. In addition to having your winning entry shared across our social media channels you’ll also be interviewed by HPAC’s editor and featured on the cover of the October edition of HPAC!