Our Journey
Explore the evolution of Heat Engineer Software from its humble beginnings to the innovative platform it is today.
2012
2012
Where it all began
Rich Cartwright starts work as an independent Heating-System Design Consultant, building an Excel® model that automatically generates MCS-compliant paperwork for heat-pump projects.
What it meant for our customers:
Faster, error-free design documents compared with the traditional "calculator & clipboard" approach.
Jan 2015
Jan 2015
Demand outstrips the spreadsheet
Installers ask to buy Rich's workbook, sparking the vision for a fully fledged cloud platform.
What it meant for our customers:
Confirmation that the industry was crying out for an easier way to run the numbers.
Jun 2015
Jun 2015
Heat Engineer Software Ltd is incorporated
Seed funding secured; mobile survey app and web portal move from idea to prototype.
What it meant for our customers:
Early adopters can survey properties on-site and sync the data straight to the office.
2016
2016
First paying users
A small but vocal beta community starts stress-testing the platform.
What it meant for our customers:
Real-world feedback begins to shape new features and interface tweaks.
2018
2018
Evenings, weekends… progress
Still a side-hustle while Rich lectures in mechanical engineering and renewables, but customer-driven updates roll out every month.
What it meant for our customers:
Regular feature drops: improved U-value library, room-by-room heat-loss wizard, PDF report generator.
2019
2019
Scaling pains and steady gains
A network of contract developers joins the project. Trade-show demos and magazine reviews boost visibility, but growth plateaus.
What it meant for our customers:
Continuous feature release cycle maintained despite the shoestring team.
2021
2021
Time to level-up
Decision taken to build a permanent in-house team and get serious on sales, marketing and support.
What it meant for our customers:
Users see faster ticket resolution, roadmap published publicly for the first time.
2022
2022
Investment-ready
Professional pitch deck and financial model assembled; talks begin with strategic investors.
What it meant for our customers:
Clearer long-term vision shared with the installer community.
2023
2023
Backed by Greenarc Ltd
Significant investment closes; Greenarc becomes parent company. Core team of software engineers hired and Version 2 architecture started.
What it meant for our customers:
Modern UI, multi-platform desktop & tablet support, and API foundation laid.
2024
2024
Version 2 released
Complete redesign ships: lightning-fast calculation engine, introducing four methods to complete a heat loss. Headcount doubles across dev, QA and customer success.
What it meant for our customers:
Easier to use and navigate. With much improved features.
2025
2025
Accelerating innovation
Dedicated sales & marketing division formed. Version 3 under way, bringing LiDAR-assisted room capture, AI-tools and built-in compliance checks.
What it meant for our customers:
Survey times slashed to minutes; automatic alerts flag any design steps that have missing data.
Our Continuing Journey
From a simple Excel spreadsheet to a comprehensive software solution, our journey has been driven by a commitment to making heat loss calculations easier, faster, and more accurate for heating engineers across the UK.
As we look to the future, we remain dedicated to innovation and improvement, always with our customers' needs at the heart of everything we do.