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.

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

🔥❄️ Deliver maximum Thermal Comfort through early evaluation.Do you want to ensure your build delivers maximum thermal c...
16/04/2025

🔥❄️ Deliver maximum Thermal Comfort through early evaluation.

Do you want to ensure your build delivers maximum thermal comfort including Part O compliance?

Overheating risks are rising, driven by climate change, airtight designs, and increasing urban density, making a strategic approach to passive and active cooling essential.

At HDSgreentech we provide thermal comfort analysis using the latest 3D thermal modelling techniques, helping design teams navigate the complexities of Part O without compromising design.

Use our services to ensure both comfort and regulatory standards and to evaluate:

• Solar gain and glazing strategies, balancing daylight and shading to mitigate overheating.

• Ventilation effectiveness, optimising natural, mechanical, and hybrid solutions.

• Thermal mass and insulation, using the right materials to regulate indoor temperatures.

Early-stage analysis is critical. Whether you're working on new builds or retrofits, integrating passive design measures and efficient cooling strategies can reduce costs and future-proof buildings against rising temperatures.

If you're navigating thermal comfort challenges and need expert insights, get in touch.
Email [email protected]
Call 07738946988
Visit https://www.hdsgreentech.co.uk/

09/04/2025

🏡 Are you a homeowner planning a new build or extension?

During the design phase, make sure you are maximising daylight potential, assessing the impact on adjacent buildings and considering tree shading to meet recommended planning requirements. ☀️

Daylighting within the construction sector ensures the best use of natural light to minimise the need for artificial light. This helps to reduce energy costs, make your building more sustainable and improve your comfort levels.

There are several building standards that your project will need to adhere to, so getting ahead of these from the outset will save unnecessary timewasting and expenses.

How can we help?

At HDSgreentech, we provide you with expert daylight analysis. Using the latest advanced software, we not only ensure that your building design meets recommendations but also allow you to optimise daylight.

Get in touch to discuss how you can bring more daylight into your domestic building project.
Email [email protected]
Call 07738946988
Visit https://www.hdsgreentech.co.uk/

🌱💡 Energy Hierarchy is a critical framework for designing and delivering truly sustainable buildings.Providing a smarter...
02/04/2025

🌱💡 Energy Hierarchy is a critical framework for designing and delivering truly sustainable buildings.

Providing a smarter approach to building performance, it doesn’t just jump into using renewables without addressing inefficiencies at the core.

• Be Lean – reduce energy demand first. Prioritise passive design to minimise the need for heating and cooling.

• Be Clean – optimise energy use. Integrate efficient mechanical systems, heat recovery solutions, and smart building controls.

• Be Green – supply energy sustainably. Once demand is reduced and optimised, incorporate renewable technologies like PV panels, heat pumps, and district heating networks.

This hierarchy aligns with Part L of Building Regulations, ensuring compliance while driving long-term cost and carbon savings. However, with Future Homes Standard and Future Building Standards on the horizon, energy efficiency measures will no longer be optional – they will be essential. So, the question to anyone in the building sector with responsibility for building design and construction is if Energy Hierarchy is being effectively used from the outset?

At HDSgreentech, we are constantly evaluating the best ways to ensure Energy Hierarchy as we help clients meet their energy, carbon and BREEAM targets using the latest 3D modelling techniques.

If you’d like to better embed these principles into every stage of your building design and construction, get in touch.
Email [email protected]
Call 07738946988
Visit https://www.hdsgreentech.co.uk/

🐝 As proud sponsors of The Honeypot Children’s Charity, we provide a monthly contribution to help them support young car...
26/03/2025

🐝 As proud sponsors of The Honeypot Children’s Charity, we provide a monthly contribution to help them support young carers.

Honeypot is a national charity providing young carers with desperately needed countryside respite breaks alongside a wraparound service. These breaks give young carers with responsibilities beyond their years the opportunity to make happy childhood memories and build brighter futures.

Demands on the charity have never been greater. As the cost of living is affecting many families across the UK, young carers need their services now more than ever.

Discover more about The Honeypot Children’s Charity, its activities, the significant positive impact it has on the children it supports, and how you can contribute to making a difference.
https://www.honeypot.org.uk/

Meet the Team🌿We were delighted when Keith joined us as a Sustainability Consultant in 2019. With a first-class master’s...
19/03/2025

Meet the Team🌿

We were delighted when Keith joined us as a Sustainability Consultant in 2019. With a first-class master’s degree in mechanical engineering, an international career pioneering Integrated Environmental Solutions (IES) Modelling and 12 years working in conservation, he promotes the values of excellence and environmental protection that we, too, endorse.

Keith’s career to date has been extensive and varied, with sustainable design and environmental impact at its core. Here are just a few highlights:

• 2003 saw Keith introduce the first IES software to New Zealand while working as a design engineer

• Headed up the mechanical design for the Les Mills flagship gym

• Projects range from work on a wide variety of buildings from the Farnborough Exhibition & Conference Centre to prisons, offices, schools, nursing homes, and a skyscraper in Dubai

• Alongside his mechanical engineering career, Keith works in conservation with primates and other animals from helping run a multi-park sanctuary with volunteers to setting up a new park with only river access in Bolivia, through to developing release methods for baboons in South Africa.

With his solid foundation in IES modelling, Keith brings a holistic view to your project, understanding the different aspects of the design process, and will always go the extra mile.

Email [email protected]
Call 07568 137661
Visit https://www.hdsgreentech.co.uk/about.asp

🏢 Do you need an EPC certificate for your commercial property?If you’re looking to sell or lease your commercial propert...
12/03/2025

🏢 Do you need an EPC certificate for your commercial property?

If you’re looking to sell or lease your commercial property you will need to provide a valid Energy Performance Certificate (EPC).

When selling a non-domestic commercial property, an EPC must be in place when the property goes onto the market and provided at exchange of contracts.

If you’re looking to lease your commercial property, the EPC will be valid for ten years, providing no major renovations have been made.

As a Level 5 accredited Low Carbon Energy Assessor, Damian can undertake your EPC assessment for any non-domestic building in England. Once completed you will receive a lodged EPC with any recommendations to help make your building more energy efficient, should that be required.

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

06/03/2025

⚡Did you know that the UK has one of the highest Spark Gaps in Europe?

The cost differential between gas and electricity per kWh, known as the spark gap, this makes environmentally harmful gas-fired heating much more appealing within the UK. We’ve all seen the push for heat pumps, but the cost of these means that they need a SCOP of 3.9 or better to break even.

This economic driver is completely at odds with our desire to cut our environmental impact and lead the way to decarbonisation.

The hope is that this will change as gas is phased out of our national grid and the carbon intensity of electrical generation decreases.

Whilst the Government and policymakers can drive progress, we can all work towards environmental goals by using the latest research and thermal modelling within building design.

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

28/02/2025

New UK Net Zero Carbon Buildings Standard now being piloted🌿

Following two years of development a science-led UK standard has now been released. The purpose of this is to align all major building sectors with the Paris Agreement’s goal of limiting global warming to no more than 1.5°C above pre-industrial levels.

The standard has been produced following a collaboration by industry experts and is designed to enable the building industry to robustly prove their build assets are net zero carbon.

Key principles
• Covers both operational and embodied carbon
• Focuses on energy efficiency and closing the gap between design and real-world performance
• Prioritises reuse of buildings and materials
• Takes a Whole Life Carbon approach
• Encourages on-site renewable energy generation
• Supports grid decarbonisation and electrification, through demand management
• Applicable to new and existing buildings across all sectors

At HDSgreentech, we are monitoring the pilot and can advise on how to incorporate measures into your project. Once further data has been collected, the standard will develop, and we will stay informed to ensure projects meet vital industry targets for sustainable buildings.

Get in touch for more information and to discuss your project.
Email [email protected]
Call 07738946988
Visit https://www.hdsgreentech.co.uk/

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

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