HVAC Design, Cooling Load

A new 100-page, 20-chapter handbook for MEP/HVAC engineers covering hydronic, refrigerant, fire protection and plumbing pipe design and sizing — with formulas, worked examples, and code references.

Learn the professional cooling-load workflow—from heat gains and psychrometrics to airflow, coil duty and equipment selection—with a practical 157-page HVAC guide.

Correct package-unit sizing is not simply a conversion from floor area to tons. Follow this practical procedure to check cooling load, airflow, humidity, fan pressure and corrected equipment performance.

Correct air-terminal placement is not a matter of drawing diffusers at equal distances. Learn how to position supply, return and exhaust devices using the room load, required airflow, tested throw, occupied-zone comfort, contaminant control and commissioning checks.

Master HVAC cooling load calculations from building data to equipment selection. This practical guide covers heat transfer, psychrometrics, envelope and internal loads, ventilation, airflow, coil duty, equipment selection, worked examples, and common design mistakes—ideal for HVAC engineers, MEP designers, consultants, contractors, and students.

Learn how to select HVAC sound attenuators that effectively control noise without creating excessive pressure loss. This practical guide covers insertion loss, octave-band performance, face velocity, regenerated noise, attenuator sizing, installation considerations, and fan ESP—helping engineers achieve quieter, more energy-efficient HVAC systems.

A practical guide to designing vertical refrigerant risers and oil traps, covering oil return velocity, suction pressure drop, trap placement, double risers, liquid line lift, and key commissioning checks for reliable DX and VRF system performance.

Refrigerant pipe sizing is not only about selecting a pipe that “fits.”A wrong pipe size can reduce cooling capacity, increase compressor load, create noise, and even affect compressor reliability. Why pipe sizing matters ✅ Maintains proper refrigerant flow ✅ Controls pressure drop ✅ Supports oil return to the compressor ✅ Protects cooling capacity ✅ Reduces noise and vibration ✅ Improves long-term system reliability Main refrigerant lines 🔵 Suction Line Carries low-pressure

AHU casing leakage and thermal bridging can reduce delivered airflow, increase fan and cooling energy, create condensation risk, and affect comfort. This article explains the causes, performance impact, inspection points, and practical ways to improve AHU casing performance.

UV-C systems inside AHUs can help keep cooling coils, drain pans, and wet surfaces cleaner by reducing biofilm and microbial growth. This article explains the design benefits, correct installation locations, BMS points, safety requirements, maintenance needs, and key limitations engineers must consider.

High-velocity cooling coils can carry condensate into downstream ducts, filters and equipment. This guide explains how to select moisture eliminators using coil face velocity, droplet-removal efficiency, pressure drop, drainage capacity, materials and maintenance requirements. It also includes calculation methods, a worked example and practical commissioning checks.

Dirty filters are more than a maintenance issue. They increase pressure drop, reduce airflow, affect fan power, lower cooling capacity and can cause humidity, DX coil freezing and low delta-T problems in HVAC systems.