Technical Articles & Guides

HVAC & MEP Engineering Insights

Practical engineering guides, standards comparisons, and industry insights from our team of MEP engineers.

HVAC Design

Pump Head Calculation for Chilled Water Systems

Why closed loops ignore building height, which friction losses actually count, and how to land the duty point on the pump curve.

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Electrical Design

Voltage Drop Calculation & Cable Sizing Basics

The 3% and 5% limits, imperial and metric methods, derating factors, and a worked example where run length — not current — sets the cable.

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Electrical Design

Transformer Sizing for Buildings: kVA Calculation Guide

kVA vs kW, demand and diversity factors, growth allowance and standard ratings — how building transformers are actually sized.

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MEP Fundamentals

Shop Drawings vs Design Drawings in MEP: What's the Difference?

Who produces each drawing set, the level of detail to expect, how approvals run, and where as-builts fit in the chain.

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Outsourcing

How Much Does MEP Design Cost? Fees & Pricing Explained

Percentage fees, per-square-foot rates and fixed fees compared — what drives the price, honest ranges, and what a proper quote must include.

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Plumbing Design

Water Supply Pipe Sizing: WSFU & Hunter's Curve Explained

How fixture units become a design flow, why demand grows slower than fixture count, and the velocity and pressure limits that fix pipe sizes.

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Plumbing Design

Plumbing Drainage Design: Fixture Units, Pipe Sizing & Venting

How DFUs work, sizing branches, stacks and building drains, the slopes that keep drains self-cleansing, and the venting that protects every trap.

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HVAC Design

Fresh Air Requirements: ASHRAE 62.1 Ventilation Calculation

The Ventilation Rate Procedure step by step — the Vbz formula, typical rates by occupancy, Ez and Ev corrections, and a worked office example.

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HVAC Design

Chilled Water vs VRF: Choosing an HVAC System for Commercial Buildings

Capacity ranges where each wins, capex vs 20-year running cost, part-load behaviour, plant space, piping limits and the buildings that suit each.

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Fire Protection

Fire Sprinkler Design Basics: NFPA 13 Hazard Classification

Hazard classes, design density and area, Hazen-Williams hydraulic calculations and proving the water supply can feed the demand.

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BIM & Coordination

MEP Clash Detection: How BIM Coordination Saves Rework

Hard, soft and workflow clashes, the Revit–Navisworks coordination cycle, and why LOD 300–350 is where coordination pays.

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Electrical Design

Electrical Load Calculation for Buildings: Load Schedules Explained

Connected vs demand load, demand and diversity factors, and how one schedule sizes the transformer, generator and cables.

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Electrical Design

How to Size a Generator for a Building (kW Calculation)

Essential vs full backup, running vs starting watts, motor inrush, kW vs kVA and the margins that make a standby set dependable.

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HVAC Design

Duct Sizing Guide: CFM, Friction Rate & Static Pressure

Calculate CFM from the load, pick the right friction rate and velocity limits, and size ducts that keep static pressure low.

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Outsourcing

Outsourcing MEP Design: The 10-Point Checklist Before You Hand Over a Project

Scope, deliverables, codes, BIM setup, review gates, revisions and pricing — what to pin down before outsourcing, and the red flags to trust.

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Standards & Codes

ASHRAE vs CIBSE: Which Standard Should Your MEP Design Follow?

How the two frameworks differ on load methods, ventilation and energy, which markets expect which, and the rule for choosing your design basis.

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MEP Fundamentals

What Is MEP Engineering? A Complete Guide

What mechanical, electrical and plumbing systems cover, why MEP is a quarter to half of construction cost, and when you need an MEP engineer.

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Load Calculations

What Size Air Conditioner Do I Need? (Room Size to BTU/Ton Guide)

How AC sizing works, how room size relates to BTU and tons, and why square footage alone isn't enough — with a free calculator.

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Load Calculations

How to Calculate Cooling Load for a Room (Simple Guide)

What cooling load is, what drives it, and how to calculate it step by step — with a free calculator to size your system.

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