HVAC Contracting

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Our troubleshooting problem involves a split system heat pump in which the outdoor unit is operating in an 85°F ambient, and when you arrive in response to the customer’s no cooling complaint, you find the indoor fan operating normally, and you also note that 240 volts is read at L1 and L2 of the outdoor unit.

For the retrofit of a boiler system installed in the 1960s, the contractor selected Aquatherm Blue Pipe® polypropylene-random (PP-R) piping for the job because of its flexibility and material and labor cost savings.

How can you not like a book that begins, “The future is not what it used to be,” quoting Laura Riding and Robert Graves from 1937? The book Millennial City: How a New Generation Can Save the Future, by Dennis Walsh and Glen Hiemstra, addresses the millennial generation and the near future.

Automated Logic Corp. (ALC), a leading provider of building automation systems, is providing critical building monitoring and control for Intergate.Manhattan, believed to be the world’s tallest high-rise data center.

Bob and Tim were doing a routine service contract call. They had fastened gauges to the compressor at the condensing unit and had a temperature lead fastened to the suction line at the evaporator coil. They were observing the pressures and temperatures and Tim said, “The suction pressure is not stable. Isn’t it supposed to be stable during a long running cycle?”

Mechanical contracting firm TAG Mechanical Systems Inc. announced that it provided HVAC mechanical systems and a 54 kW solar photovoltaic (PV) system for the Skaneateles Village Hall in Skaneateles, N.Y. The facility is the first municipal net-zero energy building in New York State.

The U.S. Equal Employment Opportunity Commission (EEOC) has taken an increasingly aggressive posture toward enforcement actions against employers. Employers should be aware of these troubling trends in EEOC behavior and be prepared to properly respond to an EEOC complaint.

Grace Church, a non-denominational congregation in Eden Prairie, Minn., is saving more than $100,000 annually in utility charges as a result of completing a recommissioning of its facility.

To establish the openings for return air grilles, you can use a frame made on the job from sheet metal. It forces the wall hangers to cut the return air openings as they install the sheetrock.

A building energy management system (BEMS) represents a significant investment, so it’s important to look beyond initial cost and specify one that is flexible, scalable, and backwards compatible in order to receive maximum value and return on investment over the long term.