The measure of a heat pump’s heating performance is called coefficient of performance or COP. It’s the ratio of useful heat output, divided by required energy input, where both the output and input are expressed in the same physical units.

Avoid lightweight concrete for heated slabs.

An efficient hydronic system is more than just a high-performance boiler.

Einstein’s definition of insanity was doing the same thing over and over and expecting different results.

Wet-rotor circulator technology got to where it is today through continuous design and manufacturing improvement.

All boilers that aren’t designed to operate with sustained flue-gas condensation should be protected against sustained flue-gas condensation.

Hydronics has long been known for unsurpassed heating comfort

It’s time to get serious about water quality in hydronic systems.

I know that proper system design can quickly rid just about any hydronic system of air and keep it that way.