Harrison How Ltd

Qualified electrical, mechanical and air conditioning engineers in London


What we do

Office Space

Commercial and Domestic Installations

From large commercial office blocks to schools, hospitals, houses and churches. We have installed electrical and mechanical services throughout the city.


Breakdowns, Callouts and

PAT Testing

Flickering light? Noisey A/C? Power failure? Minor repairs? Our engineers are on hand. We provide a fast and reliable service in the city. Call for a free quote.

Air Filter

Emergency Lighting and Air Conditioning Maintenance

We regularly service and maintain many clients throughout the city to ensure the A/C is working efficiently and the emergency lighting complies with BS7671. 


NICEIC Inspection and Testing

In need of Electrical Installation Condition report? We are a fully registered member of the NICEIC and will inspect and test domestic properties and commercial offices.

about us

Harrison How Limited have been serving our clients since 1939. Our engineers have decades of experience between them on all aspects of electrical and mechanical work. 


“Very approachable, professional and knowledgeable in their field. Highly recommend Harrison How Limited.”

Leonora Newell, Google Review.


Follow us on Social Media 
  • Facebook
  • Twitter
  • Instagram