by Choice Mechanical Team | Oct 5, 2026 | Chiller Articles
A chilled-water plant is designed to send cold water into the building and receive it warmer after coils absorb heat. When return water comes back only slightly warmer, the plant has low delta T. The immediate temptation is to blame the chiller, but the cause often...
by Choice Mechanical Team | Oct 5, 2026 | Boiler Articles
A steam boiler and a hot-water boiler can both heat a commercial building, but they move energy in fundamentally different ways. Steam carries latent heat as vapor and condenses at the load. A hydronic system circulates liquid water whose temperature falls as heat is...
by Choice Mechanical Team | Oct 5, 2026 | Boiler Articles
A commercial boiler can fire cleanly, circulate water, and show no local lockout while the building remains cold. The missing heat may be hidden in a sensor that reads five degrees high, an outdoor-reset curve that lowers water temperature too aggressively, a staging...
by Choice Mechanical Team | Oct 5, 2026 | Boiler Articles
A hydronic pump rarely announces its remaining life with one unmistakable alarm. It may continue running while flow falls, vibration rises, a seal begins to weep, or the motor draws more current. Occupants notice cold zones, while the boiler plant sees unstable...
by Choice Mechanical Team | Oct 5, 2026 | Boiler Articles
A boiler room needs air for more than one reason. Burners require combustion air. The room may need ventilation to remove heat. Draft and venting systems depend on stable pressure. Other fuel-burning appliances, exhaust fans, louvers, and building HVAC systems can...