All Posts

An HVAC system can only perform as well as the engineering calculations behind it. The load calculation establishes how much heat and moisture must be removed from a space. That result determines the required supply airflow. Airflow then drives duct dimensions, pressure losses, acoustic performance and fan selection.

Learn the essential steps for sizing a chilled water fan coil unit, including cooling load, airflow, chilled-water flow, external static pressure and final manufacturer selection.

Learn how to design a chilled water pump system—from calculating water flow and pipe pressure losses to determining pump head, selecting the correct pump and planning efficient controls. Avoid common design mistakes and discover practical Nexora tools that make HVAC calculations faster and easier.

Learn the fundamentals of HVAC design, from cooling-load calculations and system selection to airflow, duct sizing, equipment selection and commissioning. This practical beginner-friendly guide explains the complete design roadmap and introduces Nexora resources that help you strengthen your HVAC knowledge and calculation skills.

Learn how to design a chilled-water piping system step by step—from cooling-load and flow-rate calculations to pipe sizing, pressure-loss analysis, pump-head selection, valves, controls, insulation and commissioning. Includes practical equations, diagrams, tables and a complete worked example for HVAC and MEP engineers.

Learn HVAC duct design step by step: calculate airflow, size ducts, estimate pressure loss, identify the critical path and determine fan ESP with equations.

staircase pressurization calculation, smoke control calculator, HVAC Excel calculator, pressurization fan calculation, MEP engineering tools

Learn HVAC step by step with this highly visual 168-page beginner’s guide. Explore refrigeration, cooling loads, duct and pipe sizing, controls, installation, commissioning and a complete small-office design project. Includes 45 chapters, practical calculations, diagrams, exercises, a PDF and an editable Word edition.

Discover how CFD analysis improves car park ventilation across the Middle East. By visualizing airflow, pollutant dispersion and stagnant zones, engineers can optimize jet fans, control CO and NO₂, reduce energy use and support safer, authority-compliant basement designs.

Successful HVAC projects depend on more than accurate cooling-load calculations, duct sizing and equipment selection. Contractors must also estimate project costs correctly, prepare structured bills of quantities, control procurement commitments, monitor actual expenditure and protect the expected profit margin. When these commercial activities are handled in separate spreadsheets, estimators and project teams can easily lose control of revisions, supplier rates, variation or

Indoor swimming pools are among the most demanding spaces for HVAC engineers. Unlike normal air-conditioned rooms, a swimming pool enclosure continuously receives moisture from the pool-water surface, wet deck, occupants, outdoor ventilation air and uncontrolled infiltration. If this moisture is not properly calculated and removed, the facility may experience condensation, corrosion, mold, damaged finishes, uncomfortable conditions and poor indoor air quality. PoolDry Pro – S