Improving the energy efficiency of our existing buildings is the
Improving the energy efficiency of our existing buildings is the greatest challenge facing the building services industry and the answer could be a simple boiler upgrade. James from holt has been servicing/repairing our geothermal system for several years now and we have always found him to be knowledgeable, competent and professional we purchased a property with an existing geothermal system and james has helped us along the learning curve of understanding our system. No matter the issue,.