Global Optimism is a purpose driven enterprise focused on social and environmental change. Global Optimism exists to precipitate a transformation from pessimism to optimism as a method of creating social and environmental change.

Gluckman Consulting is a specialist technical consultancy providing expertise related to refrigeration, HVAC solutions and climate change mitigation. Gluckman Consulting also provides specialist services related to refrigeration, air-conditioning and heat pump systems, including services linked to the climate change issues, advice on the energy efficiency of existing and new systems, guidance on the selection of refrigerants for new systems.

Good Energy is an energy service company that embraces tech to help Britain get to net zero carbon emissions. They do this through providing 100% renewable electricity and developing innovative services to support customers to generate, share, store, use and travel with truly clean power. They’re passionate about the planet and empowering people to fight the climate crisis. That’s why they’ve been providing clean energy to businesses and homes.

GoodWe UK is a pioneering, clean energy solutions multinational enterprise. they are at the forefront of the global transition to a Smart Energy World, striving for a zero-carbon future and a clean and healthy global environment. GoodWe solar inverters have been used in residential and commercial rooftops, industrial and utility-scale systems and range from 0.7kW to 250kW.

Formed in 1966, Gradwood Ltd is an established name in Industrial Heating, Workshop Heating, Air Conditioning and Smoke Ventilation, and for over forty years we have been involved in the design, installation and maintenance of systems throughout the country. They have a large, innovative and vibrant team of engineering experts and designers who work cohesively to deliver award-winning warm air heating and RADIANT heating solutions.

Gray & Adams is the UK pioneer in the manufacture of specialist temperature-controlled and bespoke vehicles. Founded in 1957, they are a long-established, family-owned business with 750 employees, based out of a head office and main production facility in Fraserburgh, Aberdeenshire and have operational sites across the UK in Doncaster, Dunfermline and Newtownabbey.

Green Cooling specialize in three distinct areas, the first being the provision of refrigerated storage to satisfy both frozen and chilled demands, the second is the application of high efficiency cooling systems utilizing the natural refrigerant CO2 and the third area is the design & installation of cooling systems with full or partial heat recovery.

Green Zone Surveys are the UK's accredited supplier of building and energy compliance services. Offering nationwide coverage and unrivaled in-house technical expertise, it works alongside businesses to ensure they achieve and remain compliant, become more efficient, and ultimately reduce their energy costs.

Greenmill Supply Company is one of the UK's pioneer wholesalers of Air Conditioning and Ventilation Install products. They provide Air Conditioning Supplies, Ventilation Supplies, Plumbing Supplies, Fixture and Fittings Supplies, and ZoomLock Braze-free Systems.

GROB-WERKE GmbH & Co. KG has been the pioneer in designing and building highly innovative production and automation systems for nearly 100 years.

GTC provides multi-utility networks for new-build developments across England, Scotland and Wales. GTC designs, installs, adopts, owns and operates network infrastructure for all the utilities – heat, electricity, gigabit-capable fiber broadband, water, wastewater, and gas.

GV Booth Plumbing & Heating provides high quality service and installation of HVAC systems in Loughborough region of Leicestershire, United Kingdom.

H2-ECO is the developer and investor for medium-sized Hydro and wind electricity generating projects. It works in partnership with Landowners to generate a sustainable income for both partners with no investment required from the landowner. H2ecO manages all of the development process and licenses so the process does not require time from the landowner.

H2GO Power is a pioneering cleantech company. They develop and deliver hydrogen energy storage technology for zero-emission, safe and reliable power supply, with a range of commercial applications.

Hamilton Air Conditioning has been supplying top quality air conditioning for over thirty years. They owe it all to their talented engineers! Without their knowledge, their passion and their attention to detail, they wouldn’t have been able to provide so many fantastic systems to their trusted clients over the years.

Hamworthy Heating is a British commercial boiler manufacturer and supplier of commercial heating and hot water products. It can help users find the most energy-efficient heating and hot water system for their building.

Harding Heating Ltd is a Gas Safe® registered heating and plumbing specialist based in Shropshire. It focuses on domestic plumbing and heating, from servicing and maintenance to new boiler and heating installations.

Hassle Free Boilers has been installing sustainable energy systems nationwide for almost a decade. In fact we have already installed over 8,000 systems across the UK helping thousands of families to reduce their carbon footprint as well as fuel bills.

Hawco is an international distributor and a UK wholesaler of HVAC products. They provide Refrigeration systems, Air Conditioning, Electrical Process & Control, HVACR, Components, Process Heating Control, and Process Heating.

HDR | Hurley Palmer Flatt Group is the UK’s leading independent multidisciplinary engineering consultancy, providing solutions for the built environment. HDR | Hurley Palmer Flatt Group is Headquartered in London, and comprises of: - HDR | Hurley Palmer Flatt - HDR | Andrew Reid - HDR | Bradbrook Consulting - HDR | Concentre Consulting

Health and Safety Executive (HSE) is the national independent watchdog for work-related health, safety and illness. Their mission is to prevent death, injury and ill health in Britain's workplaces. They are an independent regulator and act in the public interest to reduce work-related death and serious injury across Great Britain’s workplaces.

Heat Geek is renewing the heating industry. Home heating accounts for 17% of the UK's carbon emissions and to tackle this, they have developed a digital-first experience that enables people to upgrade their homes with carbon-free heating. Heat Geeks are part of one of the largest independent renewables installer communities in the country, with access to incredible training and community support to deliver customer energy upgrades.

Heat Orkney has an experienced team who can assess, install and commission any size of heat pump or air conditioning equipment. We pride ourselves on a professional service where the customer satisfaction comes first. They offer a free quote to supply, or supply and install, any sized systems throughout the whole of Orkney- including outlying islands, Shetland and northern Scotland.

The Heat Pump Association (HPA) is the UK’s based authority on the use and benefits of heat pump technology and includes many of the country’s manufacturers of heat pumps, components, and associated equipment.

Heat Pump Federation lobbies government for long term policy supporting the electrification of heating and cooling, works to raise awareness, understanding and confidence in heat pump technology across both domestic and commercial sectors, and collaborates with government, industry and consumers to make this a reality.

Heat Pumps UK, a trusted company with years of industry experience providing an end-to-end service for customers has been looking to upgrade its heating system and taking advantage of the available funding schemes.

Heatable offers fixed price boiler replacements to customers UK wide. They have partnered with Alpha, Viessmann & Worcester-Bosch boilers to provide products at super competitive rates. They are here to simplify the boiler buying process, provide transparency of pricing and pass huge savings on to the customers.

HeatFix Scotland Ltd is the market leader in Scotland for service & repair on all renewable and carbon-fueled heating appliances. They are the number one choice in Scotland for professional boiler repairs, servicing, and boiler cover.

Heatforce has been supplying quality fireplaces, bathrooms, boilers and renewable energy solutions for over 35 years. They also provide heating installation, servicing & maintenance, fireplace installation & servicing, renewable energy installation, and bathroom installation & maintenance.

Heating and Hotwater Industry Council (HHIC) has been established for driving, supporting and promoting the sustained growth of the UK domestic heating and hot water industry.