All Legionella Test Results are Not the Same

Legionella testing laboratories will usually express their findings across all Legionella species using available culture methodologies (through ISO or CDC).  In some cases, laboratories are required by regulations to do so.  While on the surface, testing for all species of Legionella would seem to be more protective of public health, evolving information has shown the opposite.  This […]

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On Site Work

Highland Terrace – Westchester Co. Below we have a new boiler installed with a dual fuel gas/oil burner.  This is a hydronic system.  We installed a Heat-Timer HWR control panel with a 3-way valve to provide precise heating water temp. control to the building.  The heating water temps can be fine tuned to react to […]

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Seasonal Change Over of your HVAC systems

Despite the fact that we have just had our fourth Nor’easter in the last three weeks, the time to change you’re HVAC systems from heating to cooling is close at hand. How you perform the winter layup of the heating system or the startup of cooling system can have a dramatic effect on how your […]

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Lindy Coils & Hot Water Systems: Part 2

When you’re in the heart of the heating season (October 1st through May 31st) and your boiler’s running anyway to heat the building, it’s an absolute no-brainer to use the Lindy coil and make all your hot water.  This is arguably the most practical and cost-effective way to produce all the hot water for your building […]

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Lindy Coils & Hot Water Systems Part 1

By Luke Wonnell If you own a Scotch Marine or cast iron sectional boiler in the NYC metro area, there’s an excellent chance you have one or more Lindy coils installed in the boiler, which provide all the domestic hot water for your entire building on an instantaneous basis.  Depending on the size of your […]

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Softener Equipment

Sodium zeolite softener systems consist of a softener tank, valving and a means of transporting brine (salt solution) to the softener tank.  The tank includes a service and rinse water inlet distributor, freeboard or the headspace from the top of the resin bed to the top of the vertical wall of the tank, a regenerant distributor, a […]

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DOBNOW Digest Article

“2017 was a big year for DOB NOW. We released nine additional work types in DOB NOW: Build along with boiler and façade filings in DOB NOW: Safety, and received a combined total of 90,000 filings through both systems. Stay tuned for more updates and additional work-type releases in 2018! Recent Enhancements On January 16, new enhancements were […]

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Boiler Re-tubing: On Site Work

Below are pictures of a recent boiler tube replacement in Brooklyn. During this project we Torched and cut 25 old, corroded bottom boiler tubes (picture 1). Once cut, these tubes are removed from the boiler and the boiler room itself. The boiler vessel and tube drum are then flushed clean. Twenty five new U.S steel […]

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Softener Operation and Regeneration

Softener Operation A sodium zeolite softener operates through two basis cycles:  the service cycle, which produces soft water, and the regeneration cycle, which restores the exhausted resin to capacity.  During the service cycle, raw water enters the softener through the inlet distributor, flows through the resin bed, is collected by the underdrain system and then […]

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