H2X Engineering: Plumbing Design Calculation Tool For Engineers

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We help engineers create highly accurate designs.

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Trusted by Industry-Leaders

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What you can design in h2x:

Heating and hydronic design
Domestic and commercial water systems
Underfloor and radiant floor heating design
Duct, ventilation and MVHR design
Heat loss calculations
Stormwater and drainage calculations
Chilled water design
Fire protection system design

Heating / Hydronic

Heating Design

Domestic Water

Domestic Water Design

Duct / Ventilation

Duct Design

Heat Loss Calculations

Chilled Water

Chilled Water Design

Underfloor Heating

Underfloor Heating Design

MVHR

MVHR Design

Fire Protection

Fire Protection Design

Stormwater

Stormwater Design

Gas

Gas Design

Wastewater

Wastewater Design

Heating / Hydronic
Heating Design
Domestic Water
Domestic Water Design
Duct / Ventilation
Duct Design
Heat Loss Calculations
Heat Loss Calculations
Chilled Water
Chilled Water Design
Radiant Floor Heating
Radiant Floor Heating Design
MVHR
MVHR Design
Fire Protection
Fire Protection Design
Stormwater
Stormwater Design
Gas
Gas Design
Wastewater
Wastewater Design

Built for:

Consultants

Compliance and accuracy.

Design Software For Consultants

Contractors

Speed up project timelines.

Design Software For Contractors

Manufacturers

Get your products specified.

Design Software For Manufacturers

Loved by Engineers

★ ★ ★ ★ ★

Brilliant, simple and easy to use. Game changer.

James Major

Director at Hubb

★ ★ ★ ★ ★

h2x is great software, our company use it nearly every day. It is easy to use with direct conversion from h2x to Revit.

Callum Craig

Engineer at WDE

★ ★ ★ ★ ★

A game changer for the humble plumber. Incredible.

Brad Winkel

Director at Queenstown Plumbing

★ ★ ★ ★ ★

h2x is fantastic software. It is very easy to use and the ability to output to Revit is a fantastic time saver.

Joe Kirrane

Engineer at MEP

★ ★ ★ ★ ★

Big time game changer to the industry!

Viv Jude

Director at UHC

★ ★ ★ ★ ★

Incredible software! Super user-friendly and allows you to save so much time.

Devni Gamage

Engineer at DMA

★ ★ ★ ★ ★

The software is very easy to use. The heat load calculation function is particularly impressive.

Toinpre Amaegbe

Senior Mechanical Engineer at ROCMEP

★ ★ ★ ★ ★

We've been using h2x for our mechanical design work and are consistently impressed. Highly recommended.

Edward Jones

Mechanical Engineer at Noquet Building Services

★ ★ ★ ★ ★

The software is fantastic, it's a real time saver and we can install with confidence knowing we have all our maths correct.

Matt Little

Heating Manager at ECO Providers

★ ★ ★ ★ ★

h2x go above and beyond to ensure customer satisfaction. They are flexible, responsive, supportive, and collaborative.

Joshua Musgrove

Director at Eco-Nexus Engineering

★ ★ ★ ★ ★

Wins us more, better jobs. Accurately models complex systems in an easy to use interface. Outstanding customer service.

Nick McPhee

Director at Duo Heating & Renewables

★ ★ ★ ★ ★

Fantastic software, great results and very user-friendly producing great designs and reports.

Timothy Rudd

Director at TJR Heating & Cooling

★ ★ ★ ★ ★

I started using h2x recently and I am amazed how easy it is to produce perfect results every time.

Gary Law

Technical Consultant at EDF Heat Pumps

How engineering teams use h2x in practice

Engineering consultancies use h2x software for accurate calculations, to reduce design risk, and to improve internal review workflows. Leon's team is just one example.

Check out our other case studies

Why teams choose h2x

Built by Engineers, for Engineers

Created by industry experts frustrated with traditional processes, h2x was designed with a deep understanding of engineering workflows and challenges.

★ ★ ★ ★ ★

Customer focused, easy to communicate with, and invested in my success! The team go above and beyond.

Joshua Musgrove Director at Eco-Nexus

Highly Accurate

h2x delivers detailed, accurate calculations backed by CIBSE's independent verification and aligned with ASHRAE standards, giving engineers confidence in their results and every design.

★ ★ ★ ★ ★

The real-life temperatures aligned perfectly with the design calculated by h2x. This is an excellent result and a verification of the accuracy of h2x.

Alan Hall Head of Programs Plumbing and Gas Fitting at TAFE

Easy to Learn

h2x is intuitive, backed by 150+ video resources, live training sessions, free learning tools, and a dedicated team ready to get you onboarded quickly. Plus, enjoy 24/7 support and live demonstrations to help you hit the ground running.

★ ★ ★ ★ ★

I've recently started using h2x and it's probably the most user-friendly software  I've ever used.

Jamie Donaldson Construction Manager

What Makes h2x Special

h2x is built to reflect how real engineering teams work. Instead of isolated calculations or rigid templates, it combines standards-led configuration, transparent calculations, and connected design tools into a single, consistent workflow.

Custom Settings

Define your own standards and system parameters.

Accurate Calculations

Calculate precise sizes for your whole engineering system.

Intuitive Design Tools

Speed up the drawing process with our smart design tools.

Product Database

Access manufacturer-verified data for specifications.

Automated Estimating

Generate detailed material lists and cost estimates.

Drawing Exports

Export designs to PDF or integrate with CAD/Revit.

Try designing in our software

Design a mechanical, plumbing or fire system in h2x below and experience just how easy it is:

We're here to help!

Free Trial and Demonstrations

Live Training Sessions

150+ Video Resources

Free Learning Tools

24/7 Instant Support

Watch Demo Try For Free

Engineering principles that guide h2x

h2x is built around a set of core engineering principles that ensure every design is accurate. Learn about the core calculations and methodologies our software uses through these detailed technical guides: