Nate and Ace are replacing a 30,000-Btu cooling system. The new system is a 10 SEER. They have removed the refrigerant by following the refrigerant handling requirements of Section 608 of the Clean Air Act. Having completed the component installation, including a new condensing unit, properly sized refrigerant lines, and a matching cooling coil with a TXV, they are preparing to charge the system.
At the 13th annual Energy Efficiency Forum, held at the National Press Club, the theme was “Evolution of the Energy Economy: Ensuring Security and Stability.” The speakers highlighted the need for energy diversity, in efficiency and alternative sources, as well as in production.
In this first installment of a three-part series, The News examines the issues surrounding the certain types of mold and their relationship to HVACR systems. Since Stachybotrys chartarum has garnered the most media attention and has been linked to highly visible stories involving adverse health affects, The News is using this type of mold to exemplify the entire mold testing and remediation story.
“Hate” is maybe too strong; how about “intensely dislike.” Statistics show that 75% of contractors spend over half of their entire marketing budgets in the Yellow Pages. Yet this results in just 13.4% of HVAC sales.
When DST Output decided it needed more space to expand its printing and publishing services for mutual fund companies, it looked in a rather unlikely spot. Instead of choosing an existing building to move into or even vacant land on which to build, DST Output chose to renovate an abandoned railroad roundhouse.
The Partnership for Air-Conditioning, Heating, Refrigeration Accreditation (PAHRA) was introduced over two years ago. The organization aims to set standards by which all HVACR programs can assess themselves. Linn State Technical College’s HVACR program was the first in the nation to align itself with PAHRA’s standards.
Rooftop units have come a long way in recent years. They now contain more sophisticated controls, improved serviceability features, and unique ways to address indoor air quality (IAQ) issues. But even the best-made rooftop can’t keep soldiering on if routine maintenance is not performed regularly.
Is it mold or is it gold? The latest “money-maker” for HVACR contractors may come from testing and remediation of mold and other indoor allergens. But is it worth the time, effort, and expense to become an indoor air quality (IAQ) expert, especially in testing for and remediation of mold?
Compressor hard-start devices are a luxury item for service technicians to use in rectifying a myriad of compressor start problems. The hard-start device can serve as an insurance policy for compressor starts when voltages drop to 90% of rated line conditions.
Rooftop units toil away during the day under hot conditions; consequently, their energy efficiency, as compared with chiller systems for building cooling, is generally much lower. One manufacturer, Calmac Corp., has created the Roofberg® system, which permits conventional rooftop units to be converted to a central chiller system with ice storage.