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
What Is Air Film Resistance and Why Does It Matter for Load Calculations?
A technical guide to surface air film resistance: what it is, how it forms, and how it...
Calculating Solar Heat Gain in HVAC Designs: A Step-by-Step Guide
Learn how to calculate and control solar heat gain in HVAC design.
Heat Load Calculation Software: Why Engineers Are Moving Beyond Trane TRACE and Carrier HAP
Legacy heat load calculation software like Trane TRACE and Carrier HAP no longer fits the modern engineering...
CIBSE-Verification: What It Means and Why It Matters
Why adopting and using a CIBSE-verified platform confers significant advantages for your projects.
Air-to-Water Heat Pump Retrofit: 4 Scenarios Where AWHPs Shine
Not every building is ready for a heat pump, but some are perfect for one. Here's how...
Calculating Heating and Cooling Loads: What’s the Difference?
Calculating heating and cooling loads requires understanding two opposite problems: heat gain in summer and heat loss...
How to Reduce Heat Pump Lifecycle Cost in Cold Climates
While initially expensive, air-to-water heat pumps deliver the lowest total lifecycle cost of any heating option for...
Why Water Wins: The Thermodynamic Case for Air-to-Water Heat Pumps
Learn why air-to-water heat pumps use water to move heat more efficiently than many conventional HVAC systems.
Why Revit Falls Short for Design Engineers
Revit handles modelling and documentation well, but design engineers still need better calculation tools.
Internal Heat Gain: A Practical Guide for HVAC & Building Services Engineers
Everything you need to know about internal heat gain in your engineering designs — from occupants, lighting,...
Design-Build Contracts: Advantages, Risks & How HVAC Contractors Can Win Bigger
Design-build contracts can improve margin and control, but they also increase liability. Here's how smart contractors reduce...
What Is the Revit Tax? How Autodesk’s BIM Platform is Eating Your MEP Margins
The hidden MEP workflow cost that's eating your profit, and how to get it back.
Featured (Must-Read Blogs)
How To Calculate Duct Size: A Comprehensive Guide
Learn how to calculate duct size effectively with h2x's comprehensive guide below. Improve airflow and efficiency within...
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 for HVAC system design.
Hazen-Williams vs. Darcy-Weisbach: Which Should You Choose?
Compare Hazen-Williams and Darcy-Weisbach for pipe friction loss, accuracy, simplicity, fluid type, and when to use each...
How to Size Water Pipes
To size water pipes correctly is critical for the performance of your design. Below, we will explore...
The Importance of Calculating Residual & Static Pressure
Water pressure is an essential aspect of every plumbing system. Here, we explain the importance of calculating...
Highlights (Free Downloads)
Ductulator Chart: Practical Guide for Mechanical Engineers (Free Download)
Duct size directly affects noise, energy, and layout, which is why you should use the Ductulator Chart...
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...