High Efficiency Boiler Systems


A significant change in the North American hydronic heating industry took off and gained altitude in the mid 1990’s. Residential and light-commercial gas-fired boilers started to rapidly evolve from high-temperature, chimney-vented appliances to pressure-vented, modulating, high-efficiency condensing (mod-con) boilers.

Start Learning Right Now, For Free:
Free Course: How to Design & Sell Mod-Con Boilers with Roy Collver
Free Course: High Performance Building and HVAC 101

New Refrigerants are Coming. Here’s How to Prepare Your HVAC Business.

Dan Dempsey isn’t prone to hyperbole. He’s a midwestern engineer – not a salesman with an agenda. The kind of guy you can trust when he tells you something.

That’s why I asked Dan to help me understand what electrification means for HVAC business owners. What are the most important changes that HVAC companies need to […]

June 23rd, 2023|Categories: Boilers, Geothermal Heat Pumps, Heat Pumps, HVAC Design, Hydronic Heating||

Live Commissioning (Cx) Class with 8 PDHs Launching March 18th

If you’re ready for a deep-dive into Commissioning (Cx), Khaled Yousef is ready to give it to you. He’s teaching a one (full) day commissioning course on March 18th.

This course has been evaluated and approved by the Practicing Institute of Engineering, Inc. (PIE) for compliance with the New York State Mandatory Continuing Education requirements for […]

John Siegenthaler’s Latest Air-to-Water Heat Pump Design

I caught up with John Siegenthaler this week and asked him what he’s working on. His answer didn’t disappoint. Aside from teaching courses on hydronic system design, biomass heating, and air-to-water heat pumps, here are the five things John is most excited about working on this Fall:

Here are some photos and schematic of the air […]

Climate Change and COVID Crisis Boost Interest in Ventilation

The Covid-19 crisis and climate change are boosting interest in ventilation and in training that helps people calculate the amount of ventilation needed in a home or building, says HeatSpring instructor Rick Karg.

Karg, who teaches  ASHRAE 62.2 Ventilation for Single Family Dwellings, says people are increasingly interested in ventilation because it helps reduce the spread […]

David J. Goldstein Awarded Genius Grant for Multifamily HVAC Solution

Please join us in congratulating David J. Goldstein, the first Genius Grant award recipient for 2021. David is an engineer and an entrepreneur. He has self-funded the development of a new HVAC solution that has potential to make multifamily housing more affordable while increasing occupant comfort and reducing CO2 emissions.

We learned of David’s work through […]