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
Gas Pipe Sizing in 4 Simple Steps
When undertaking gas pipe sizing, the pressure loss through the pipes cannot exceed the difference between the...
Prefabricate Your Design & Calculation Process
'Prefabrication' is a word that has positive connotations, and rightly so. The word associates with quality, efficiency,...
Sizing a Ring Main with a Diversified Flow Rate
It appears that sizing a ring main accurately is a black art within the industry that has...
We Need to Stop Using ‘Length’ as a Dead Leg Design Parameter
No matter what type of building you are designing, you will likely have a design parameter relating...
6 Hot Water System Design Considerations for Recirculation
Six practical checks for circulated hot water systems, from pipe routing and circulation flow to pressure loss,...
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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...