- June 9, 2022A frantic call about a malfunctioning humidifier led to a long climb up the stairs of a high-rise — only…
- April 21, 2022A recreation complex's domestic hot water was lukewarm despite the boiler system running. The piping arrangement allowed boiler water to…
- April 21, 2022Converting a furnace to hydronic heating with a boiler and indoor-outdoor reset seemed like a great idea — until the…
- April 21, 2022New automatic flow limiters were blamed when a heating coil produced no heat, but zero pressure drop across the limiter…
- March 17, 2022An expansion tank connected on the discharge side of the pump caused the pump inlet pressure to drop below atmospheric,…
- March 10, 2022A condo building's new modular boiler appeared undersized but was actually firing at half capacity due to a plugged strainer…
- January 27, 2022Using a pump curve to estimate flow is a useful technique, but only if the gauge piping is correct. In…
- January 13, 2022Prison combination toilet bubblers serve double duty as a sink faucet and drinking fountain — which is why they must…
- December 16, 2021When small rooftop units came up short on airflow, the fix was surprisingly simple: swap in the next-size-up motor. The…
- November 11, 2021Pressure-independent control valves were being blamed for a building's pumps running at 80% speed regardless of load. The real problem…
