HVAC Contracting

RSS

The U.S. Department of Labor (DOL) announced a revamping of the “white collar” exemptions test. When the changes become effective, employers can expect greater scrutiny and a further increase in wage and hour lawsuits. It is therefore important for employers to understand the upcoming changes to the overtime rules.

Bitzer has announced it has modified all models of its two-stage reciprocating compressors to enable them to run with R-448A and R-449A refrigerant. The refrigerants have global warming potentials (GWPs) of 1,386 and 1,397 respectively.

In this troubleshooting situation, you are responding to a customer’s complaint about their heat pump, and you’re not the first technician called in to solve this problem of “not keeping the home comfortable and running a lot.”

Contractors, architects, engineers, and others who specify commercial and industrial boilers continually seek systems that are more cost effective, energy efficient, and environmentally friendly. The boiler industry has responded by making significant advances in both construction and design.

Computer technology is ever-evolving. While that’s exciting for techies, it can be a headache for business leaders, whether they are corporate executives or small business owners.

A group of manufacturers and certification bodies, coordinated by the European Heat Pump Association (EHPA), has agreed to the terms of the Heat Pump Keymark, which the participants say they expect to become the single certificate for heat pumps in the European market.

Wiegmann Associates announced it has completed work on a new LEED-certified refrigerated food distribution center for The Chefs’ Warehouse in Las Vegas. As engineer of record and mechanical and controls construction manager, Wiegmann designed and installed all refrigeration systems, HVAC equipment, and a building automation system.

Bob and Tim were at a retail store and were preparing to do a routine service call on a 5-ton heat pump. It was a fall day with a temperature of about 50°F when they turned the heat pump on. After doing a visual inspection at the air handler, they moved to the roof to give the outdoor unit a visual inspection.

The new Building Load Deferment (BLD) system, from HIGHMARK, New York City, is a pre-engineered thermal energy storage system, enabling energy usage to be deferred to off-peak hours via ice storage and then utilizing that ice for the building’s chilled water system during peak hours, for energy savings of up to 50 percent.