A selection of recent projects across Northern California. Every system here is in service today.
Preventing acidic condensate from disintegrating a 120-foot masonry chimney serving a Peerless LC steam boiler, solved with an AL294C Category IV liner and a TDF250 inline draft fan.
Three 2,000 MBTUH condensing boilers on a single 60′ common vent, held inside a 0.00″ to +0.20″ W.C. draft window across a 30:1 turndown using a Sealed Modulating Damper at each appliance.
Sleeving a 14-story steel boiler stack with a hybrid mechanical-draft fan and modulating damper system, installed piece-by-piece from a rooftop davit arm, with the original chimney left in place.
Routing a 120′+ commercial kitchen grease duct to a fire-rated shaft using DuraDuct KEX 2-hr fire-rated, double-wall assembly with seesaw drainable low points, without losing 10 ft of ceiling to code-required slope.
Common-venting two Cleaver-Brooks hot water boilers and two Cochran steam boilers through a single 16″ chimney inside an 18″ OD envelope, with back-to-back Enervex IPVB 500 inline draft fans for redundancy and discharge above the pool area.
Re-vented six AERCO BMK 5.0 condensing boilers from a penthouse sidewall to the roof, two common flues, two stand-mounted TDF draft fans, and EBC31 modulating controls. Ended the monthly fire-department calls triggered by steamy condensing exhaust at the penthouse windows.
