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
Why Is Residual Water Pressure Important in Plumbing Systems?
Residual water pressure is the pressure available while water is flowing. Learn what affects it, why low...
Why Is Static Water Pressure Important in Plumbing Systems?
Static water pressure occurs when no water is flowing. Learn why it matters, how elevation changes pressure...
4 Hevacomp Alternatives in 2026
h2x is a modern day Hevacomp: easy to learn, fast to design, incredibly accurate, and offers a...
Water Flow Rate Calculations
The flow rate calculation is the basis for all of your water system calculations; it informs: Water...
How to Size Water Pipes
To size water pipes correctly is critical for the performance of your design. Below, we will explore...
How to Improve the Efficiency of Your Design Process
Efficient design in engineering is crucial. For any given engineering project, there are myriad different decisions and...
How to Improve the Productivity of Your Engineering Team
Productive engineering teams are the key to designing and delivering high-quality projects. When teams deliver high-quality projects...
H2X Roundup from the ASPE Convention & Expo in Indianapolis
Every year designers, architects, wholesalers and contractors attend the largest event for plumbing system design professionals —...
FREE Pipe Volume Spreadsheet
Access h2x's free pipe volume spreadsheet to streamline calculations, optimise design, and enhance efficiency in piping projects.
h2x vs. Spreadsheets
Since its launch back in 1985, Microsoft's spreadsheet application Excel has gone on to become accepted as...
Why Accurate Calculations Are Crucial in Heat Pump Designs
For decades now, engineers have been relying on rule of thumb and their own prior experience when...
Introducing Heat Pumps
On 18 October 2021, the UK government unveiled its plan to provide 90,000 households with £5k grants...
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...