HDSgreentech Ltd

HDSgreentech Ltd HDSgreentech specialise in helping building design and construction teams meet their energy, carbon and BREEAM targets.

We can validate design and provide the advice using an experienced consultants and the latest 3D thermal modelling techniques. Vision - To deliver a better built environment experience with integrity at its core. Mission - To provide sustainable building solutions for everyone, that lessens environmental impact and waste. HDSgreentech offers the construction industry an accredited and rigorous bui

lding simulation and design advice service with over 30 years experience. We provide our clients with the right advice at the right time, backed by detailed simulation and calculation. We give close attention to simple, low cost and effective design features and firmly believe we can offer benefits to all projects, large and small alike. Our simulation services not only inform and validate building designs, but also ensure projects are engineered specifically to meet the brief, without the over-engineering that so often occurs. Examples of the latter include reducing the need for overly complicated and expensive building services.

☀️Limit the impact of solar gain using smarter design ☀️At HDSgreentech, we utilise building physics and computational m...
18/06/2025

☀️Limit the impact of solar gain using smarter design ☀️

At HDSgreentech, we utilise building physics and computational modelling to help you design out excess solar gain and reduce cooling demand.

By managing how much solar energy enters a space, you can:
• Cut reliance on air conditioning
• Downsize HVAC capacity
• Improve overall energy performance

Many designs rely on standard assumptions (e.g. glazing g-value), but we can take this further by:
✅ Simulating real-world performance (not just template values)
✅ Modelling glazing options, shading devices and solar orientation
✅ Identifying which occupied spaces need interventions

This allows you to optimise designs to reduce HVAC loads and costs.

Changes, such as reducing the g-values or adding external shading, can make a huge difference when based on solid modelling, not guesswork.

Let us help you make your new building future-ready and efficient.

Email [email protected]
Call 07738946988
Visit https://www.hdsgreentech.co.uk/

👟 Congratulations to Damian for completing the Copythorne 5k for the second time.“Thanks to the Copythorne Carnival team...
11/06/2025

👟 Congratulations to Damian for completing the Copythorne 5k for the second time.

“Thanks to the Copythorne Carnival team for once again organising a fantastic three days of entertainment and activity to raise funds for the local youth via Stanley’s Own Scouts. We’re proud to have sponsored the event, and running in such a lovely part of our county is always a joy. I’m looking forward to signing up for the 5k again next year.”

Email [email protected]
Call 07738946988
Visit https://www.hdsgreentech.co.uk/

06/06/2025

WE ARE SORRY
ALL CARNIVAL RELATED EVENTS ON SATURDAY 7th JUNE ARE CANCELLED DUE TO THE FORECAST HIGH WINDS AND RAIN

ALL OTHER EVENTS ON SUNDAY AND MONDAY ARE STILL ON

People involved with Saturday will be updated during Friday 6th June

Raffle draw will now take place on Friday 20th June


Race numbers will still be available for collection on Saturday but for a reduced period, 1pm to 3pm at the Scout HQ and on Monday evening 5.30pm to 7pm.

It was good to see a brilliant turn out at the Solent Property Professionals Breakfast. Thank you to Vail Williams for o...
02/06/2025

It was good to see a brilliant turn out at the Solent Property Professionals Breakfast. Thank you to Vail Williams for organising. Damian won this months raffle.

🏫📚 Unlocking the complexities of climate-based Daylight Modelling for schools.Daylight design in schools isn't just abou...
28/05/2025

🏫📚 Unlocking the complexities of climate-based Daylight Modelling for schools.

Daylight design in schools isn't just about letting in natural light – it’s about ensuring compliance, enhancing student well-being, and optimising energy efficiency. Achieving compliance for the Schools Output Specification is far more intricate than simply meeting daylight factors.

This is where Climate-Based Daylight Modelling (CBDM) becomes critical. Unlike traditional daylight assessments, CBDM accounts for real-world, location-specific daylight conditions throughout the year, using hourly climate data to evaluate factors like:

✅ Useful Daylight Illuminance (UDI), balancing sufficient daylight with glare control

✅ Annual Sunlight Exposure (ASE), avoiding excessive solar gain

✅ Spatial Daylight Autonomy (sDA), ensuring consistent, self-sufficient daylight levels

For those involved in the design of schools, use of these metrics is essential, not just for compliance but for creating learning environments that support student performance and long-term sustainability goals.

Our team specialises in detailed daylight modelling, simulation and validation, ensuring that school projects meet DfE Output Specifications, optimising energy use and visual comfort.

If you're working on a new school design and want to navigate these complexities effectively, let’s talk. 🌱💡
Email [email protected]
Call 07738946988
Visit https://www.hdsgreentech.co.uk/

⭐⭐⭐⭐⭐Doing an exceptional job is paramount at HDSgreentech.That’s why we’re always proud when clients take the time to w...
21/05/2025

⭐⭐⭐⭐⭐
Doing an exceptional job is paramount at HDSgreentech.

That’s why we’re always proud when clients take the time to write us a glowing testimonial.

"I have worked with Damian on many projects over the last few years
ranging from 5k to 300k square feet mainly on the energy modelling and can
say that the service and product have always been excellent throughout
no matter what size of project. Would gladly recommend them for all
types of building services requirements. A pleasure to work with."

"They are a small business and they offer a personal touch, I know
what I am going to get when I come to them for a job and the level of
service I will receive. HDSgreentech is not hyper-contractual and is
always flexible and reasonable to get the job done. In addition, they are
always able to offer advice on projects, sometimes even ones they are
not working on. A really valuable partner and almost part of our team!”

If you need help validating building designs to meet energy, carbon and BREEAM targets get in touch with our specialist team.
Email [email protected]
Call 07738946988
Visit https://www.hdsgreentech.co.uk/

14/05/2025

🐾 Thermal Modelling for animals – a unique challenge at Marwell! 🌡️

Replicating a rainforest within Marwell Zoo posed many challenges for the design team. We were brought on board for our considerable expertise in thermal modelling. As a team committed to animal welfare, including Keith, who has undertaken various ventures over the years within this area, we were obviously keen to get involved.

🌿 Thermal modelling for human comfort is one thing – doing it for a tropical house full of animals is another! Working closely with the design team, we all had to rethink our approach:

• Species-specific needs – different animals need different temperatures and humidity levels, often requiring gradients rather than uniform comfort.

• Microclimate design – modelling helped shape sun-bathed zones, cool retreats, and humidity pockets, mimicking natural habitats.

• Solar gain and ventilation – balancing passive heating, shading, and gentle airflow ensured comfort without energy waste or stress to the animals.

Thermal modelling became ecosystem modelling – a fascinating challenge! Does your project pose unusual challenges?
Email [email protected]
Call 07738946988
Visit https://www.hdsgreentech.co.uk/

Passive Design – the first step in Energy Hierarchy⚡Passive design is the foundation of the energy hierarchy in the purs...
07/05/2025

Passive Design – the first step in Energy Hierarchy⚡

Passive design is the foundation of the energy hierarchy in the pursuit of sustainable, high-performing buildings. By adopting a ‘Be Lean’ or Fabric First approach, we can reduce operational energy demands before considering active systems.

What does this mean in practice?

• Low U-values
• Optimising g-values
• Low Air permeability rate
• Strategic air paths for ventilation and comfort
• Use of thermal mass to regulate internal temperatures
• Building orientation and glazing ratios for natural light and solar control

⚖️ Finding the balance

A low g-value might help meet Part O (limiting overheating), but it can negatively impact SAP calculations. Striking the right balance is key for both compliance and comfort.

Looking ahead

The SAP Fabric Energy Efficiency standard is already shaping regulations, and the EPC consultation suggests future ratings may incorporate it even further. Could BRUKL assessments be next?

How are you approaching passive design in your projects? Let’s discuss how we can integrate these principles for a more sustainable built environment. 🌍
Email [email protected]
Call 07738946988
Visit https://www.hdsgreentech.co.uk/

01/05/2025

We are delighted to announce that today is our 11th anniversary!🎉

🌿 Thanks to our many customers for supporting us over the years, using our specialist building physics and sustainability consultancy to help meet energy, carbon and BREEAM targets.

Dr Damian Markham-Smith started HDSgreentech in May 2014 from a rented office in Marchwood. Eleven years later, we have a team of three operating from our own premises in Fawley and have worked on over 500 projects. The sectors we have engaged with are diverse and include schools, museums, offices, healthcare settings, and private residences. 🏢 🏗️ 🏡

Celebrating their latest milestone, Damian says, “Using the latest scientific advances to improve sustainability within buildings has always been important to me. Our services focus on providing specialised computational modelling for simulation and calculation. I’m so proud that HDSgreentech has been a part of projects that drive positive change, making buildings better for those who inhabit them and the wider environment.”

As building standards and expectations evolve, HDSgreentech will continue to lead the way, assisting M&E Designers, M&E Subcontractors, and the broader building community.

To learn more about how HDSgreentech can assist with your building project
Email [email protected]
Call 07738946988
Visit https://www.hdsgreentech.co.uk/

&EDesigners

💧🚰 Clean water, decent toilets and good hygiene should be normal for everyone.Almost 1 in 10 people worldwide don’t have...
23/04/2025

💧🚰 Clean water, decent toilets and good hygiene should be normal for everyone.

Almost 1 in 10 people worldwide don’t have clean water close to home, and 1.5 billion people don’t have their own toilet. Diarrhoea caused by dirty water and poor toilets kills a child under 5 every 2 minutes. Good hygiene is integral to keeping people healthy and helping to stop the spread of disease and yet 2 billion people don’t have access to clean water and soap.

As supporters of WaterAid we provide a monthly donation to help this international not-for-profit organisation in its goal to deliver clean water, toilets and good hygiene to all within a generation. So far, WaterAid has reached around 29 million people, providing them with the three essential components.

Change starts with water.

Find out how you can help.
Visit https://www.wateraid.org/uk/

Happy Easter from the team at HDSgreentech
18/04/2025

Happy Easter from the team at HDSgreentech

Address

Southampton
SO451ED

Opening Hours

Monday 8:30am - 6pm
Tuesday 8:30am - 6pm
Wednesday 8:30am - 6pm
Thursday 8:30am - 6pm
Friday 8:30am - 5pm

Telephone

+447738946988

Website

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