HVAC (heating , Ventilation and Air conditioning) BLOG

The Hook: When Thermostat Adjustments Never End If your building staff spends the day adjusting thermostats for individual tenants, the problem is rarely the thermostat. It is usually a hydronic distribution problem . Many commercial buildings experience constant complaints such as: “My office is freezing.” “The meeting room is too hot.” “Temperature changes every hour.” “We never reach the setpoint.” Facility teams often respond by adjusting thermostats or reprogramming the BMS. But the real issue is deeper in the hydronic system control logic and balancing . In many cases, the building is suffering from a “Sick Building Hydronic Syndrome.” Understanding the Real Problem: Hydronic Imbalance In modern HVAC systems, chilled water or hot water is distributed throughout the building to serve multiple zones. For the system to work properly, each zone must receive the correct flow rate . This is where Pressure Independent Control Valves (PICVs) come into play. PICVs are designed to: Mainta...

  Commercial and industrial HVAC systems are the backbone of building comfort, safety, and productivity. They keep temperatures stable, air quality healthy, and operations running smoothly. But with heavy usage and complex components, these systems are prone to a wide range of issues that can impact efficiency, increase energy costs, and even halt production. If you manage a commercial building, warehouse, manufacturing plant, or large industrial complex, it’s essential to recognize the warning signs early. Here’s a list of 30 common HVAC problems that occur in commercial and industrial facilities: Inadequate cooling or heating capacity Uneven temperature distribution across different zones Frequent short cycling of HVAC equipment Poor indoor air quality causing occupant discomfort Excessive humidity or overly dry indoor air Unusual or loud noises from HVAC equipment High energy bills due to system inefficiency Frozen evaporator coils reducing cooling output Refrigerant leaks affe...

  If you've ever found yourself sweating indoors while your air conditioner runs non-stop, you're not alone. Whether it's the peak of summer or a humid spring day, a malfunctioning AC can turn your home into a sauna and your patience thin. In his latest book, "Why Is My Air Conditioner Not Cooling Properly?" , author and HVAC expert Charles Nehme tackles this frustrating issue head-on. With over 30 years of global HVAC experience, Nehme brings his deep technical expertise into a format that’s approachable, informative, and genuinely helpful for homeowners, renters, and even professionals in the field. What You’ll Learn This book is a comprehensive yet easy-to-understand guide that walks you through the most common causes of cooling problems, including: Dirty Air Filters – the #1 culprit behind airflow restrictions. Low Refrigerant Levels – how leaks and undercharging affect cooling. Thermostat Troubles – the small device that makes a big differen...