📝 MEP Engineering Blog

Gas Jul 26, 2026

How to Size a Gas Pipe: Natural Gas & LPG Line Sizing (with Chart)

Undersize the gas line and the appliance at the end of the run starves — low flame, pilot outages. Here's how to size a gas pipe by load and length, with a chart.

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HVAC Jul 26, 2026

How to Size HVAC Ductwork: Equal Friction, Velocity & Static Regain

Undersize a duct and it roars and wastes fan power; oversize it and it wastes metal. Here's how to size HVAC ductwork with the equal-friction method.

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HVAC Jul 26, 2026

What is a Ductulator & How to Use One (with Duct Sizing Chart)

Everyone's held the cardboard wheel, but many misuse it. Here's what a ductulator is and how to read one correctly to size HVAC ducts.

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Electrical Jul 26, 2026

How to Size a Generator (kVA): Running Load vs Motor Starting Surge

Most undersized gensets pass the running-load test and then stall the moment a big motor starts. Here's how to size a generator for both — running load and starting surge.

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HVAC Jul 26, 2026

How to Calculate Cooling Load & AC Tonnage for a Room (HVAC Heat Load)

Oversize the AC and it short-cycles and leaves the room clammy; undersize it and it never cools. Here's how to calculate the real cooling load and pick the right tonnage.

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Electrical Jul 26, 2026

What Size Wire Do I Need? Wire Gauge (AWG) Sizing by Amps

Pick the wrong wire gauge and it either overheats or wastes money. Here's how to size wire by amps — the ampacity chart, the voltage-drop check, and a worked example.

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Electrical Jul 26, 2026

Voltage Drop Calculation: Formula, the 3% Limit & How to Fix It

Lights dim or a motor won't start at the end of a long run? That's voltage drop. Here's the formula, the mV/A/m table, the 3% limit and 5 ways to fix it.

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Fire Jul 26, 2026

How to Calculate Fire Hydrant Flow Rate (Fire Flow Test Explained)

Measure how much water a hydrant can really deliver — the fire flow test, the pitot formula, and how to find the flow available at 20 psi, with a worked example.

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Fire Jul 26, 2026

Fire Flow Requirements: How Much Water Does a Building Need?

How to calculate required (needed) fire flow for a building — the ISO/IFC area method, NBC 2016 fire pump capacities, duration, and a worked example.

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HVAC Jul 14, 2026

Condensate Drain Pipe Sizing to ASHRAE / IMC 307

How to size an AHU or FCU condensate drain — condensate flow rate, pipe size per IMC Table 307.2.2, slope and trapping, with a worked example.

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HVAC Jul 14, 2026

AHU Condensate Drain Trap Calculation (P-Trap Depth)

How to calculate AHU condensate P-trap seal and total depth from fan static pressure, for draw-through and blow-through units, with an example.

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Mechanical Jul 14, 2026

Dust Collector Pipe Size Calculation (Transport Velocity)

How to size dust extraction ducts using ACGIH transport velocity — why dust ducts round down, not up, with a worked example.

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HVAC Jul 14, 2026

Server Rack Heat Load Calculation for Data Centres

How to calculate server room cooling load and airflow from rack power — why 1 kW of IT equals 1 kW of heat, with a worked example.

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Electrical Jul 14, 2026

Earthing Calculation to IS 3043: Formula, Steps & Example

How to calculate earthing to IS 3043 — earth electrode resistance, number of earth pits and earthing conductor size, with a worked example.

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Electrical Jul 14, 2026

Transformer Sizing Calculation to IS 2026 (kVA Selection)

How to size a distribution transformer to IS 2026 — connected load, diversity and demand factors, and standard kVA selection with an example.

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Electrical Jul 14, 2026

Lux Level Calculation by the Lumen Method (IS 3646)

How to calculate average lux by the lumen method to IS 3646 — number of luminaires for a room, with utilisation and maintenance factors.

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Plumbing Jul 14, 2026

NBC Plumbing Fixture Requirements Explained (2016)

How many sanitary fixtures a building needs by occupancy type per NBC India 2016 — WCs, urinals and washbasins, with a worked example.

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Fire Protection Jul 14, 2026

Fire Water Tank Capacity Calculation (NBC Part 4 / IS 15105)

How to calculate fire water storage for a building — combined hydrant and sprinkler demand per NBC Part 4 and IS 15105, with an example.

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Plumbing Jul 14, 2026

Rainwater Harvesting Tank Calculation (NBC Part 9)

How to calculate rainwater harvesting potential and tank size from roof area and rainfall, per NBC Part 9 / IS 15797, with an example.

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Electrical Jul 14, 2026

Generator Sizing Calculation — kVA Selection to IS 10000

How to size a diesel generator to IS 10000 — connected load, motor starting kVA and standard genset selection, with a worked example.

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Fire Protection Jul 14, 2026

Sprinkler Hydraulic Calculation to NFPA 13

How to perform a sprinkler hydraulic calculation to NFPA 13 — design density, flow per head and Hazen-Williams pipe losses, with an example.

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Fire Protection Jul 14, 2026

FM200 Agent Quantity Calculation (NFPA 2001)

How to calculate FM200 clean-agent quantity to NFPA 2001 — design concentration, room volume and temperature, with a worked example.

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Electrical Jul 14, 2026

Power Factor Correction: kVAR Capacitor Calculation

How to calculate the capacitor bank kVAR needed to improve power factor to a target value, with the formula and a worked example.

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Electrical Jul 14, 2026

UPS Sizing Calculation — VA and Backup Time

How to size a UPS — VA rating from connected load and power factor, and battery sizing for the required backup time, with an example.

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HVAC Jul 14, 2026

Chiller Tonnage Calculation for Buildings

How to calculate chiller tonnage for offices, hospitals, hotels and malls — from cooling load and rules of thumb, with a worked example.

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Electrical Jul 14, 2026

Solar PV System Sizing in India (MNRE)

How to size a rooftop solar PV system in India — number of panels, inverter rating and generation estimate to IS 16221 / MNRE, with an example.

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HVAC Jul 13, 2026

How to Calculate HVAC Cooling Load: Formula, Chart & Example

Learn how to calculate HVAC cooling load step by step — the heat-load formula, sensible vs latent load, a rule-of-thumb chart, and a full worked example in tons.

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Electrical Jul 13, 2026

How to Calculate Cable Size: Step-by-Step Formula & Chart

A clear 4-step method to calculate cable size — design current formula, derating factors, an ampacity chart, and a worked example for a three-phase motor.

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Electrical Jul 13, 2026

How to Calculate Voltage Drop: Formula, Limits & Example

Understand voltage drop and how to calculate it — the single- and three-phase formulas, acceptable percentage limits, and a worked example with a copper cable.

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Plumbing Jul 13, 2026

How to Calculate Pump Head (Total Dynamic Head) Step by Step

Learn how to calculate total dynamic head (TDH) for pump selection — the TDH formula, static vs friction head, Hazen-Williams C values, and a worked example.

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HVAC Jul 13, 2026

Duct Size Calculation: How to Size HVAC Ducts (Formula + Chart)

How to calculate duct size using the equal-friction method — the A = Q/V formula, round-to-rectangular conversion, recommended air velocities, and a worked example.

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General Jul 03, 2026

MEP Hire India: A Practical Guide to Building Your Technical Team

Looking to hire MEP professionals in India? Learn practical strategies for finding qualified mechanical, electrical, and plumbing engineers and technicians for your projects.

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Career/Gulf High Jun 12, 2026

Top 18 MEP Interview Questions and Answers for 2025

Discover the top MEP interview questions with expert answers, including HVAC and mechanical engineering queries, to ace your 2025 job interview.

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Career/Gulf High Jun 12, 2026

How to Get MEP Job in Gulf: Complete Roadmap for Engineers

Discover the step-by-step roadmap to secure an MEP job in Gulf countries including HVAC job UAE and how to get a job as a Saudi Arabia MEP engineer.

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Career/Gulf High Jun 12, 2026

HVAC Engineer Salary UAE and Gulf 2025: Complete Guide

Explore the HVAC engineer salary UAE and MEP engineer salary Gulf for 2025, including detailed insights on HVAC job salary Dubai Saudi Arabia.

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BIM/Software Med Jun 12, 2026

MEP Clash Detection in Revit: Step-by-Step Guide

Learn effective MEP clash detection in Revit with our step-by-step guide including Navisworks integration for precise construction coordination.

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BIM/Software Med Jun 12, 2026

AutoCAD MEP vs Revit MEP: Which to Learn First in 2025?

Explore the key differences in AutoCAD MEP vs Revit MEP to decide which HVAC BIM software 2025 suits your engineering career best.

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BIM/Software High Jun 12, 2026

Revit MEP Tutorial: How to Create a Duct System from Scratch

Learn how to create a duct system from scratch in Revit MEP with this step-by-step tutorial for efficient MEP duct routing and Autodesk Revit HVAC design.

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How-to Guide Med Jun 12, 2026

How to Read HVAC Single Line Diagram (SLD): A Complete Guide

Learn how to read HVAC single line diagrams effectively with our step-by-step MEP SLD reading guide. Understand HVAC schematic diagrams easily today.

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How-to Guide High Jun 12, 2026

MEP Drawing Symbols: Complete Guide with HVAC, Plumbing & Electrical

Master MEP drawing symbols with our complete guide featuring HVAC symbols list, plumbing drawing symbols, and electrical MEP symbols plus downloadable PDF.

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How-to Guide Med Jun 11, 2026

Psychrometric Chart HVAC: How to Read Dry Bulb Wet Bulb Data

Learn how to read a psychrometric chart HVAC engineers rely on, focusing on dry bulb, wet bulb temperatures, and practical HVAC applications.

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Calculator/Tool Med Jun 11, 2026

HVAC Chiller COP Calculation Explained | Coefficient of Performance Formula

Learn HVAC chiller COP calculation with the coefficient of performance formula to evaluate chiller efficiency and improve system performance effectively.

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Problem/Fix Med Jun 11, 2026

HVAC Duct Noise: Causes and Proven Ductwork Rattling Fixes

Discover why HVAC duct noise occurs and learn effective ductwork rattling and air duct vibration fixes to solve your HVAC noise problem permanently.

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Problem/Fix High Jun 11, 2026

HVAC Not Cooling: Top Causes and Proven Solutions

Discover why your HVAC not cooling and AC not working. Learn common causes, HVAC troubleshooting tips, and how to fix chiller setpoint issues effectively.

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How-to Guide Med Jun 11, 2026

AHU vs FCU Difference: Which HVAC Unit to Choose and Why

Discover the AHU vs FCU difference and learn which unit to select for effective HVAC systems in commercial and residential applications.

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How-to Guide Med Jun 11, 2026

VRF vs VRV Difference Explained: What Is VRF System & VRV HVAC System

Understand the VRF vs VRV difference and learn what is VRF system and VRV HVAC system with practical examples for efficient HVAC design.

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How-to Guide High Jun 11, 2026

What Is CFM in HVAC and How to Calculate It Effectively

Learn what is CFM in HVAC and how to calculate it accurately for precise air flow calculation HVAC systems to optimize performance and comfort.

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How-to Guide High Jun 10, 2026

How to Calculate HVAC Cooling Load for a Room Easily

Learn step-by-step cooling load calculation with HVAC heat load formula, BTU calculation room methods, and Manual J calculation for accurate HVAC design.

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Calculator/Tool High Jun 10, 2026

Chilled Water Pipe Sizing: CHW Pipe Diameter Calculation & Velocity Method HVAC

Learn chilled water pipe sizing with practical CHW pipe diameter calculation using the velocity method HVAC standard for efficient MEP design and installation.

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Calculator/Tool High Jun 10, 2026

HVAC Duct Sizing Calculation: Step-by-Step Guide with Equal Friction Method

Learn the step-by-step HVAC duct sizing calculation using the equal friction method, with formulas, practical examples, and an HVAC duct size chart.

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