About I Love MEP

I Love MEP is the official website at www.ilovemep.com for free Mechanical, Electrical, and Plumbing calculators, worked examples, and MEP planning tools built by a working engineer for working engineers.

Last updated: September 19, 2026

Official website status

www.ilovemep.com is active and provides browser-based MEP tools for engineering planning. I Love MEP refers to Mechanical, Electrical, and Plumbing calculators; it is not a dating service or an unrelated engineering directory. The site is owned and maintained by Umar Dar, an MEP engineer based in the Middle East and South Asia region.

Why this site exists

Many online MEP calculators are too shallow for professional use. Some skip the derating factors that matter, some hide the assumptions, some produce a number without any explanation of how it was reached. I Love MEP is built around workflow tools that combine inputs, results, warnings, assumptions, interpretation, standards references, and print-ready output. The goal is fast technical support without accounts, subscriptions, dashboards, or unnecessary friction.

The launch structure follows the three main MEP branches: Mechanical, Electrical, and Plumbing. Mechanical includes HVAC and fire fighting. Electrical includes power, fire alarm, and ELV. Plumbing includes water, drainage, pumps, tanks, and hot water systems. Each calculator publishes its methodology, standards references, and version history so users can see the calculation basis before relying on a result.

How the site is used

I Love MEP is used by MEP engineers, estimators, contractors, consultants, and site teams for quick early-stage engineering checks, tender support, budgeting bands, coordination discussions, feasibility studies, and design-verification sanity checks. It is not a substitute for stamped construction-issue calculations, hydraulic analysis software, load-flow studies, or manufacturer sizing tools. Each result should be reviewed against project specifications, authority requirements, and the applicable local codes before construction or procurement decisions.

The site is organised around common engineering workflows rather than isolated calculators, so users can move from discipline to category to the exact tool with fewer clicks. A typical workflow — sizing an electrical room from transformer to breaker to cable to conduit, for example — touches four related calculators that share input logic.

Editorial and calculation standards

The calculators, guides, and worked examples on I Love MEP follow a fixed editorial standard:

Cited references. Formulas, derating factors, and duration requirements cite the underlying standard (IEC 60364, BS 7671, NEC, ASHRAE, SMACNA, NFPA 13, NFPA 20, NFPA 22, NFPA 72, BS 5839, BS EN 12845 and equivalent local codes).
Assumptions on the page. Every calculator page lists the assumptions used, including reference ambient temperature, pipe material properties, insulation class, and the default derate factors.
Warnings and limits. Results that fall outside a typical planning range trigger an on-page warning so the user can rerun with corrected inputs.
Version history. Every calculator has a version note (see version history) describing what changed and why, so users can decide whether to rerun an earlier calculation.
Worked examples. Each discipline has a downloadable PDF pack of worked examples showing the calculator inputs, intermediate steps, and the final result against a real project scenario.

Review and update process

Content is reviewed on a rolling schedule and updated when a referenced standard is revised, when a user identifies a gap, or when a new code edition takes effect. Update dates appear on every page. When a calculation methodology changes materially, the version-history page notes the change so users can retest earlier work if needed.

User feedback is welcome. The suggestion box and contact page are the primary channels; typical response time is 48 hours on working days.

Author and Founder

Umar Dar is the MEP Engineer & Founder of I Love MEP. He has more than 15 years of experience in mechanical, electrical, and plumbing design for commercial, residential, and industrial projects across the Middle East and South Asia, including work on multi-storey commercial buildings, mixed-use developments, healthcare facilities, industrial plants, and residential towers.

His practical background includes MEP design coordination, tender review, procurement support, contractor evaluation, and site-level engineering review. This informs the calculator scope: the tools focus on the questions that come up repeatedly during tender, coordination, and site support, rather than academic problem sets.

Areas of expertise covered on this site:

HVAC load calculation, duct sizing, ventilation, and equipment selection
Electrical distribution, cable sizing, protection coordination, and transformer sizing
Fire protection design including sprinkler demand, standpipe demand, fire pump selection, and water storage
Fire alarm and ELV systems including panel battery sizing, loop loading, and detection coverage
Plumbing and drainage including water demand, pipe sizing, pressure drop, and pump head
MEP cost planning, capex budgeting bands, and due-diligence checklists for tender and acquisition support

The calculators are maintained with an engineering-review workflow: formula notes, assumptions, sample data, warnings, worked examples, standards references, and version history are published so users can understand the calculation basis before relying on a result. The site does not claim professional licensing or authority approval for calculator outputs; final project decisions should be checked by qualified professionals against local codes, authority requirements, manufacturer data, and project specifications.

Personal LinkedIn: Umar Dar

Follow I Love MEP: X · YouTube · LinkedIn

Contact: Use the contact page for questions, corrections, or collaboration enquiries.

Advertising and monetisation

I Love MEP participates in the Google AdSense programme. Advertisements shown on the site are served by Google and are subject to Google's advertising policies. The site does not accept payment to influence calculator methodology, standards references, or worked-example content. Editorial content and advertising are kept independent. See the privacy policy for details on cookies used by advertising and analytics partners, and the cookie policy for user controls.