AHU Psychrometric & KPI Calculator | TheHVACLab Technologies TheHVACLab Technologies AHU Psychrometric & KPI Calculator ASHRAE Compliant SI Units Field-Ready Psychrometrics KPI Engine Fan / SFP Energy Penalty FDD Rules ℹ Enter DB + RH (or DB + WB) for each state point. The calculator computes enthalpy, humidity ratio, ADP, BPF, SHR, and coil capacity. […]
The A2L RefrigerantRevolution Is Here
The A2L Refrigerant Revolution | HVACR Technical Blog HVACR Technical Blog · March 2026 The A2L RefrigerantRevolution Is Here Technical Analysis · 18 min read · Updated March 2026 R-410A is gone from new equipment. R-454B and R-32 are taking over. Here’s everything HVACR engineers, contractors, and facility managers need to know about the A2L
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TheHVACLab Energy Solutions — Psychrometric Analysis Report TheHVACLab CFM CMH LIVE CALC Export PDF 🌡Air Properties ❄Cooling Analysis 🔀Air Mixing 📈Psychrometric Chart Air State Inputs Dry-bulb temperature & relative humidity Dry Bulb Temp °C Relative Humidity % Run Analysis Constants — ASHRAE Fundamentals Atmospheric Pressure101.325 kPa Dry Air Cp1.006 kJ/kg·K Water Vapour hfg2501 kJ/kg Water
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TheHVACLab – HVAC Engineering Platform TheHVACLab Engineering Platform Psychrometric Engine Cooling Load Engine Air Mixing Engine Air State Input Dry Bulb (°C) Input Method Relative HumidityWet Bulb Relative Humidity (%) Wet Bulb (°C) Pressure (kPa) Calculate Air Properties Air Properties Dry Bulb — RH — Wet Bulb — Humidity Ratio — Enthalpy — Dew Point
Role of VAV in Commercial Buildings: How It Works and Why It Matters
The role of VAV in commercial buildings has become central to modern HVAC design, especially where energy efficiency, occupant comfort, and zoning flexibility are critical. Variable Air Volume (VAV) systems are widely used in offices, hospitals, schools, airports, and high-rise buildings because they deliver conditioned air based on actual demand not constant airflow. For HVAC engineers, facility
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Scope of Cold Rooms in the Indian Economy: Growth, Applications, and Infrastructure Demand
Introduction The scope of cold rooms in Indian economy has expanded dramatically over the past decade, driven by growth in food processing, pharmaceuticals, agriculture exports, organized retail, and healthcare infrastructure. With India being one of the world’s largest producers of milk, fruits, vegetables, seafood, and vaccines, cold storage infrastructure is no longer optional, it is
HVAC Filter Cost vs Energy Savings: Dirty Filters Increase SFC
Introduction In HVAC energy auditing, air filters are always the first internal component inspected and for good reason. Despite being low-cost items, HVAC filters have a direct and measurable impact on fan energy consumption, indoor air quality (IAQ), and overall system efficiency. Based on extensive field experience, one issue repeatedly appears across commercial buildings and hospitals: filters are
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Motor Selection and Energy Savings in HVACR Systems
Introduction For commercial buildings, motor selection is no longer a purely mechanical decision—it is a strategic energy and financial decision. Facility managers and HVAC consultants are under increasing pressure to reduce operating costs, carbon emissions, and compliance risk, while maintaining occupant comfort and system reliability. Since electric motors account for up to 70% of HVAC
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Energy-Saving Opportunities in AHUs
Introduction Energy-saving opportunities in AHUs are a major focus for engineers and facility managers. Air Handling Units consume a large share of HVAC energy. When they run inefficiently, they increase fan power, heating load, and cooling demand. This guide explains the most effective ways to save energy in AHUs while following ASHRAE recommendations. 1. Reduce
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