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The newly renovated wing of the Finger Lakes Technical & Career Center includes offices and conference rooms, which are now being conditioned using variable refrigerant flow (VRF) technology and ventilation air supplied by three Systemair AB Topvex energy recovery ventilators (ERVs).

From energy recovery ventilators (ERVs) to filters and compressor technology, these manufacturers are pulling out the stops to meet consumer demand for better IAQ at home, work, school, and everywhere in between.

Whatever the ratio between journeymen and apprentices might be, and however that ratio is determined, the one constant is the need for adequate training for all HVACR service personnel working on a job site. 

Forward-thinking HVAC contractors are training technicians, educating customers, and even providing filter-delivery services on behalf of maintenance customers.

Voltage unbalances exceeding more than 2 percent in three-phase systems can cause current unbalance among the windings. These voltage and current unbalances can cause an increase in winding temperature and an overheating problem that can be detrimental to the motor.

Measuring the evaporator’s superheat value is an important part of analyzing a system’s performance. If a lower-than-normal value is measured, too much refrigerant is entering the evaporator for the heat load. If a higher-than-normal value is measured, too little refrigerant is entering the evaporator for the heat load. 

The following five projects demonstrate how contractors are working closely with customers to provide personalized, effective, and efficient IAQ solutions.

The aggressive environmental and regulatory positions in Sacramento have caused the rest of the U.S. to monitor policymaking and enforcement out West. And, more often than not, those policies have ended up as the blueprint for federal regulations.

CO₂ is primarily used in cascade systems that include ammonia, in booster systems in supermarkets, and as a stand-alone refrigerant for transcritical-configured systems.

Education was at the forefront as Heating, Air-conditioning, and Refrigeration Distributors International (HARDI) members gathered in San Antonio for the organization’s annual conference.