Technology

A breaker interrupting rating cannot establish the SCCR of a complete industrial control panel. Connect the exact assembly evidence to the correct study location and conditions.

Everything you need to use NexBOQ: create a project, upload PDFs, run the AI takeoff, review and calibrate quantities, price the BOQ and export to Excel, CSV or PDF.

Upload MEP and HVAC PDF drawings, let AI prepare the quantities, then review, price and export your BOQ. See how NexBOQ works, what it saves and what it costs.

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.

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.

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.

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.

Correct condensate trap sizing is essential for negative-pressure AHUs. This guide explains how to convert static pressure, calculate trap depth, size H1 and H2, avoid drainage failure, and prevent AHU water leakage during operation.

AHU drain-pan design is critical for preventing leakage, standing water, corrosion, bad odor, and water carryover. This guide explains drain-pan slope, condensate trap depth, overflow protection, float switches, drain sizing, and commissioning checks for reliable HVAC operation.

HVAC water treatment protects chilled-water and condenser-water systems from scale, corrosion and biological growth. This guide explains key risks, water quality checks, treatment methods and maintenance practices to improve efficiency, reliability and equipment life.