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
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...
What is a Ductless Heat Pump? Your Simple Guide to Modern Heating and Cooling
See the benefits of a Ductless Heat Pump - energy efficient, no ductwork, perfect for zoned heating...
How to Design Underfloor (Radiant Floor) Heating: Step-by-Step Guide
Read our underfloor heating design guide, offering a step-by-step approach to planning radiant systems, including tips, calculations,...
What is a U-Value? A Quick Guide for Mechanical Engineers
What is a U-value and why does it matter in building design? Learn how to calculate U-value...
MVHR Design: Mastering Calculations For Efficient Ventilation
Master MVHR design and calculations for efficient ventilation, reduce energy use, improve air quality, and enhance system...
MVHR Explained: What It Is, How It Works & Is It Worth The Investment?
Learn what a Mechanical Ventilation with Heat Recovery (MVHR) system is, how it works, the energy-saving and...
How to Balance Radiators: A Step-by-Step Guide
Learn how to balance radiators for even heat distribution, improving comfort and energy efficiency. Modern technology makes...
Buffer Tanks 101: What They Are, How They Work, How To Size Them & Do You Even Need One?
Learn all about buffer tanks: what they are, how they work, worked examples, sizing tips, installation, maintenance,...
How Does a Hot Water Recirculating Pump Work?
Learn how hot water recirculation works, the main system and control types, how pump flow and head...
How Do Air Source Heat Pumps Work?
Find out how air source heat pumps work, their costs, benefits, and much more. Learn if they...
Essential Guide To Central Heating Design
View the essentials of central heating design with our comprehensive guide. Find innovative solutions to optimising your...
Choosing the Best Protection: Anti-Freeze Valves vs. Glycol in Heat Pump Systems
Discover the pros and cons of anti-freeze valves vs. glycol in heat pump systems. Make informed decisions...
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...