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Principal Hayley Hotel Russell London


Hotel Russell is part of the Principal Hayley collection of individual hotels across the UK and Europe. Based in Bloomsbury, the hotel was refurbished in 2005.

The hotel is popular with business guests, and following refurbishment maintained many of its original features including marble columns and huge chandeliers. Amenities at the hotel include a business centre and a bar.


The hotel recognises that its operations impact on the environment and are committed to continually improving working practices and implementing energy management technologies. One condition of any sustainable initiative is that is must reduce carbon footprint without negatively impacting on guest experience or comfort.

The Powerstar team were invited to conduct a site survey to analyse and present the guaranteed savings that the hotel would achieve from the installation of a Powerstar voltage optimisation system


After a site evaluation and load analysis, it was identified that Powerstar could effectively optimise the incoming voltage to match the electrical profile of the site, resulting in quantifiable savings.

Due to it’s unique design Powerstar also provides total phase balancing and also filters harmonics from the supply.

The Powerstar system was installed with no disruption to the hotel operations and is providing savings 24/7 with no negative impact on guest experience.

  • Annual consumption savings: 8.6%
  • Annual financial savings: £30,000pa


“We worked closely with Powerstar to identify the best options for energy saving within our portfolio. We are extremely happy with savings on all of the installations and the service received.”

Andy Barrett, Principal Hayley

Savings across the Principal Hayley portfolio

PH Hotels is a collection of landmark city centre hotels and dedicated conference and training venues across the UK.

With 23 hotels in the PH Group they have approximately 4,000 bedrooms, over 500 meeting rooms and the ability to host over 26,000 delegates per day.


  • Average annual consumption savings across all sites: 10.93%
  • Average annual financial savings across all sites: £18,167


View the Case Study PDF Here


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