Warm is an independent consultancy with the theoretical and practical
understanding to bring pioneering low energy buildings from design to reality.
Our vision is that the buildings we help design will still be comfortable, practical and very low energy places to live in 50 years’ time. We strongly believe in educating & sharing knowledge with everyone we work with. This is reflected in our training, but also in the way we approach our projects.
We’re always on the lookout for likeminded people to work with. If you’d like to join our team, please email your CV to
Our team consists of:
CEng BSc MEI MCIBSE
Peter has over 30 years’ experience in low energy buildings and is one of three practicing UK Passivhaus certifiers. He has built five of his own low energy buildings and is a Passivhaus enthusiast!
“I am fascinated by the challenge of making the theory of low energy, airtight, insulated construction work in practice. I have spent my life seeking to understand energy use in buildings so that we can live very comfortably using fewer resources.”
Sally’s early career as a building services engineer focussed on renewable and low energy systems for a diverse range of sectors including historic, industrial and educational buildings. Life as a services engineer was too easy-going so she set up WARM with her father Peter in 2009. WARM is an energy consultancy providing Passivhaus design advice and certification but also dabbles in building services, training, monitoring and anything else that improves the built environment and looks interesting. Sally particularly enjoys creating buildings with good internal comfort, preferably without extra cost.
DirectorC Eng MCIBSE MIET
Mike worked for Hoare Lea as a building services engineer for many years involved in the design of schools, offices and healthcare buildings in the South West. Having discovered Passivhaus and become a Certified Passivhaus Designer, Mike decided a change was need and wanted to find a way to focus his energy on this. In 2013 Mike decided the best way to do this was to join Pete and Sally at WARM. Mike is interested in making low energy buildings more mainstream and an affordable option to more people. On the rare occasions when not using PHPP, Mike can be found paddling and sailing around Plymouth Sound.
BA(Hons) ACIAT and Passivhaus Designer
Karl is passionately concerned with the quality of the built environment. The focus of his interest is in providing buildings which are both energy efficient and a delight to inhabit, along with developing appropriate and sensitive solutions for future-proofing our existing building stock. He sees our built environment, as much as our green spaces and countryside, as an integral part of our culture and landscape, needing robust and well considered interventions. When not strapped to PHPP or Therm software he enjoys life with two young children in Plymouth, a city full of history and an unrivalled breadth of architecture, and of course the fabulous beaches of the south west.
CEng MPhil BEng MIMechE MCIBSE
After having worked as a building services engineer and sustainable building consultant for Arup in London, Sheffield, Berlin & Cape Town, Caroline decided to settle in Devon, because it has great beaches and Dartmoor, and was lucky enough to come across WARM. The perfect match for her passion for building low energy buildings that actually perform and spending time close to the sea and the hills. Caroline also acquired a Masters in Energy Studies during her time in Cape Town through undertaking a two year research project in the creation of energy benchmarks for commercial buildings. Caroline has a particular interest in post occupancy monitoring and the interactions between buildings systems and their occupants.
After completing his degree in renewable energy, Liam spent some years in the lush, green valleys around Machynlleth, Wales. During a stint maintaining buildings at the Centre for Alternative Technology, he became interested in low embodied energy building techniques and discovered that he quite liked getting his hands mucky. Gradually, his focus switched to buildings that are low energy in use, and he experienced somewhat of a Passivhaus epiphany in 2012. He has been a proponent of the standard ever since, and became a Passivhaus Consultant in 2013. Liam still has a soft spot for buildings constructed from “natural” materials, or using traditional regional styles and techniques, as long as they are fit for 21st-century standards of energy efficiency and comfort.
Ingrid moved to England after finishing her Architectural degree in Mexico. The first few years, while she settle down, were very challenging but exciting. She volunteer at the Plymouth College of Art as a tutor in the Spatial Design degree and also got a work experience with Mitchell Architects and Green Form Design in Plymouth, plus other stuff to support her living. Her life has turned around when she joined WARM. WARM incorporates a lot of her own interests and it gives her the motivation for continue learning, but the most important is that she spend the day working with the knowledgeable and friendly WARM team. Currently she is WARM’s Office manager and she is in charge of finances, accounts and organising the Passivhaus Courses and bespoke training. Although her most important task is to provide the office with Chocolate
She became a Passivhaus Designer in 2014, since then she also helps the team with technical assistance on various Passivhaus certification and design projects.
Sue Johns studied at the Energy Research Group at the Open University before starting a family. Since than she has been closely involved many low energy building projects with Pete, both living in them and developing buildings for sale as a partner in Warmhomes. She supports the business in an administrative capacity.