Who We Are

The Hydronics Industry Alliance-Commercial (HIA-C) is a non-profit alliance of hydronic equipment manufacturers and partners operating in North America. Operating under the principle that water is the most efficient and greenest energy transfer medium on the planet, the alliance serves as a resource within the HVAC and Service Water Heating industry. Our mission is to educate, integrate, and communicate the advantages of Hydronic System Solutions.

Among the tools we provide industry is the Building Efficiency System Tool (BEST) that models and compares HVAC systems based on actual system performance data in just minutes, for free.

Building Efficiency System Tool™ 

Version 2.2 Newly Released - Download Now


What's BEST for Your Building?

What you input:
  • Location of building
  • Size of building
  • Number of floors
Then select up to four HVAC systems to compare side-by-side.

What the BEST outputs:
  • Installation cost
  • Replacement cost
  • Maintenance cost
  • Monthly energy cost
  • Electrical and fossil fuel consumption costs
  • Total system life cycle cost
  • Cumulative life cycle cost by year
  • System payback time
  • Pump and fan HP
  • System coefficient of performance (COP)
  • Building energy efficiency ratio (BEER)

The BEST delivers accurate, fast, and free efficiency estimates for early HVAC system comparison. Read "Industry Cooperation Produces BEST results" in Radiant Living.

Click to Download

BEST Tutorials



Take our Survey and Tell Us What You Think About the BEST Videos

Watch "The BEST Way to Compare HVAC System Options" Webinar


Learn the Truth About HVAC System Cost!

Featured Articles


Water-based HVAC Systems Are Naturally:
Watch the "VRF Myths" Video

Learn about 4 common VRF Myths
Hydronic systems use fluid or steam as the medium for the final heat-transfer

Projects and Case Studies