About Us

Uniquely Partnered

Uniquely partnered with some of the worlds most advanced renewable technology manufacturers, Energy Technologies have developed a bespoke range of products to meet the future of our de-carbonised energy supply

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Founded 2021

Energy Technologies Ltd was founded in 2021 and specialises in the design and supply of advanced commercial air source heat pumps and environmentally friendly acoustic solutions.

Extended Range

A Complete Range of Integrated Heat Pump Solutions

Our expanding product portfolio delivers innovative heating solutions designed to modernise existing systems while reducing installation costs. We were one of the first manufacturers to instigate full G5/5 harmonic testing across our range and we continue to pioneer the use of non-flamable refrigerants.

Our Range

Our range now includes a four-pipe heating and cooling ASHP, the four-model Hercules series, alongside the Athena all-in-one high-temperature hot water storage heat pump and the Apollo domestic exhaust air heating and hot water storage system. Each product is engineered to provide efficient, reliable performance across a wide range of applications.

Defining Features

A defining feature of our entire range is the integration of cutting-edge technologies into existing Low Temperature Hot Water (LTHW) heating systems, eliminating the need for costly secondary distribution system replacement. Supported by our UK-based engineering, commissioning, and maintenance teams, we maintain a strong commitment to research and development, providing ongoing technical support and comprehensive aftercare services.

Since developing the Hercules range of air source heat pumps, we now have an extended range of commercial refrigerant-based products, using the latest safe refrigerants and technologies, continuing our research and development to introduce new products in the future.

Located in South West London, but full UK coverage.

Our main office is in Wimbledon, South West London. We have strategic spares storage across the UK, and can offer full Air Source Heat Pump installation and maintenance across the UK through our installation partners. Product commissioning is carried out in house and technical support is all provided from the UK.

Core Competencies

Commercial air source heating and cooling plant

Designed for direct replacement of gas boilers in LTHW systems.

Energy and acoustic consultancy

Including noise mitigation strategies for urban and sensitive sites.

Lifecycle support and proactive maintenance

Including condition surveys, KPI reporting, and digital monitoring.

Strategic project management

For retrofit works in occupied properties, including stakeholder liaison, phasing, and risk management.

Product Range and Performance

The Hercules range and wider ETL product family provide flexible solutions for diverse retrofit scenarios:

  • LTHW air source heat pumps: 42kW to 180kW, designed to directly replace gas boilers without modifying existing heating systems.
  • Hot water storage heat pumps: 300L and 500L systems.
  • Heating and cooling reverse cycle air source systems: up to 340kW.
  • Four-pipe heating and cooling air source systems: up to 1MW.
  • Domestic exhaust air heating and hot water storage systems: for residential apartments.
  • All products are UK/EU compliant, reliable, and backed by full lifecycle support.

Key Strengths

Manufacturer and supplier of the Hercules range of air source heat pumps, purpose-built for retrofit markets.
Door-to-door delivery of plant, with commissioning, maintenance, and direct manufacturer technical support.
Continuous R&D programme, integrating the latest refrigerant, compressor, and inverter technologies.
London-based marketing HQ, Kent-based engineering and maintenance hub, and strategic spares storage facilities for rapid response.