Capillary tubes are generally used as the metering device on small, fractional-horsepower refrigeration systems. Charging these systems with refrigerant requires a different procedure than those systems using a thermostatic expansion valve.
R-410A has been called the air conditioning refrigerant of the future and the long-term HFC replacement for R-22. But 410A is also turning up in refrigeration applications. One example is an ice rink in the Netherlands.
What would an industry association meeting today be without a discussion about mold? At the Air Conditioning Contractors of America’s (ACCA’s) recent conference, a seminar titled “What Today’s Hvacr Contractor Needs To Know About The Mold Issue” drew an overflow crowd of anxious contractors thirsting for knowledge and answers.
Contractors must be relationship experts. But this is more than customer relations. An hvac contractor must understand the relationships in the home among heating and cooling equipment, ventilation strategies, insulation systems, windows, and other factors to get a real handle on how to maintain good indoor air quality (IAQ) and prevent problems.