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.

A practical HVAC filtration guide explaining where pre-filters, fine filters and HEPA filters belong, how each stage protects the system, and why correct filter selection improves air quality, equipment life and maintenance performance.

Automatic and manual balancing valves both help maintain correct water distribution in HVAC hydronic systems, but they respond differently to pressure changes. This article compares their operation, advantages, limitations, commissioning requirements, energy implications, and best applications in chilled-water and hot-water systems.

Sizing an expansion tank for a chilled water system is not a guessing exercise. A small error in system volume, pressure range, or temperature assumption can cause relief discharge, unstable pressure, air ingress, and long-term maintenance issues. Proper calculation ensures reliable operation, protects equipment, and avoids costly design mistakes.

Designing chilled water systems for high-rise buildings requires more than just capacity sizing. From pressure zoning to pump optimization and energy efficiency, every detail impacts performance. This guide breaks down the key engineering principles to help you design reliable, efficient, and future-ready HVAC systems.

VRF and chilled water systems are two widely used HVAC solutions for large buildings. VRF systems offer flexible zoning, energy efficiency, and easier installation, making them suitable for offices and hotels. Chilled water systems, however, are ideal for very large facilities like airports and hospitals due to their scalability and ability to handle high cooling loads efficiently.