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. […]
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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 – 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
Why Respiration Rate Heat Load Matters in Cold Room Design
Introduction: When designing cold storage facilities—especially for fruits, vegetables, and other biologically active perishables—respiration rate heat load plays a critical role. Often overlooked by general HVAC designers, this hidden heat source can significantly affect energy efficiency, temperature stability, and product shelf life. In this post, we explore what respiration heat load is, why it matters
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