The h2x Blog
We publish practical guides, top tips and trends, latest news, and more stories related to the mechanical, plumbing and fire industry.
Latest Articles
Choosing the Right Design Software for Radiant Floor (Underfloor) Heating Systems
h2x vs LoopCAD: See why engineers are switching to cloud-based radiant floor/underfloor heating design software for 2x...
The Thermodynamics of Comfort: Why Radiant Floor & Underfloor Heating is Superior
Radiant Floor (Underfloor) Heating is sometimes thought of as a luxury add-on, but it can deliver so...
You Were Hired to Deliver BIM. Revit Alone Won’t Get You There.
Why the path to true MEP information modeling runs alongside Revit — not deeper into it.
h2x: The Smartest Hevacomp Replacement for Design Engineers
With Hevacomp reaching end of life on January 1st, 2026, building services and MEP engineers need a...
Why Should Radiant Floor Heating (UFH) Design Engineers Adopt h2x?
The h2x software platform – now with brand-new enhancements for radiant / underfloor heating designs – offers...
Stop Over-Engineering: How Right‑Sizing Saves MEP Projects Money and Resources
Each time an architect changes the plans, engineers face a decision: spend days recalculating everything, or just...
How h2x Eliminates The Spreadsheet Burden
A wall shift, added bathroom, or layout tweak can invalidate an entire spreadsheet pack. Learn how h2x...
Why h2x Is the Natural Successor to Hevacomp — And Why Engineers Should Make the Switch Now
What is more dangerous to an engineering firm: a software that doesn't work, or a tool that...
How to Calculate the Darcy Friction Factor for Pipes and Ducts
Learn the Darcy friction factor formulas for laminar and turbulent flow, with a step-by-step Colebrook example using...
BS EN 12831-1:2017: Why Diversity is the Secret to Accurate Heat Loss
For decades, engineers have relied on the simple summation of room heat losses to size systems. However,...
Can You Use Microbore Pipe With A Heat Pump?
Your radiators work fine today, but will the lower temperature of a heat pump cause too much...
MEP Design Software: Cut Time and Improve Accuracy
Traditional workflows mix spreadsheets, AutoCAD, and Revit. The fastest way to reduce errors, prevent RFIs, and hit...
Featured (Must-Read Blogs)
How to Calculate Duct Size for HVAC Systems
Learn how to calculate duct size from airflow, velocity and friction rate, with a worked example for...
What Are Cv and Kv? Flow Coefficient Formulas & Valve Sizing Explained
Learn how flow coefficient (Cv) impacts valve sizing. Explore their calculation, importance in fluid dynamics, applications, and...
Calculating Heat Loss: A Step-by-Step Guide
Learn how to calculate heat loss using U-values, surface areas, temperature differences, ventilation and thermal bridging.
Darcy-Weisbach Equation vs Hazen-Williams for Pipe Friction Loss
Compare the Darcy-Weisbach equation and Hazen-Williams formula, when to use each and how they calculate pipe friction...
How to Size Water Pipes
To size water pipes correctly is critical for the performance of your design. Below, we will explore...
How to Calculate Residual and Static Water Pressure
Learn the difference between residual and static water pressure, how to calculate both through a plumbing system,...
Highlights (Free Downloads)
Duct Sizing Chart for CFM, Velocity and Friction Rate
A duct sizing chart for round and rectangular ducts, showing airflow capacity and velocity at common friction...
FREE Pipe Volume Spreadsheet
Access h2x's free pipe volume spreadsheet to streamline calculations, optimise design, and enhance efficiency in piping projects.
Hardy Cross Method – Sizing a Ring Main (FREE Spreadsheet)
Flow rate and friction loss in a pipe network system can be difficult to calculate. When the...