Welcome to Johns Slater and Haward

Chartered Designers of Mechanical and Electrical Systems in Buildings 


Our Associate Director Paul Bird is the winner of the 2018 CIBSE East Anglia Engineering Excellence Award for the new purpose-built office facility for Suffolk County Council and Waveney District Council at Riverside Road, Lowestoft. 

The Project aim was to provide an environment for both Councils to conduct their business in a building that set a standard for occupant satisfaction and environmental performance; reducing both running costs and their carbon footprint. 

The energy efficient building was designed based on the principles of ‘passivhaus’. Key features included Actimass (Termodeck) Thermal Mass heating and cooling, ground and air source heat pumps, photovoltaics and rainwater harvesting. 

Heat Recovery at the University Arms Hotel

Innovative Ductwork Solution designed by Johns Slater and Haward

The University Arms Hotel in Cambridge opened in 1834 as the city’s first hotel. Since then, it has undergone extensive redevelopments in 1891, 1900, 1925 and, finally, in the 1960s, when the original Regency section along Regent Street was demolished and replaced with a discordant structure typical of the period.

The hotel has now reopened after an £80m transformation, which combined a complex heat recovery retrofit with a sympathetic restoration scheme. The redevelopment is a collaboration between architect John Simpson – who oversaw the replacement of the 1960s extension – and interior designer Martin Brudnizki.

The process of designing the ventilation strategy for the hotel began in 2013 and the final design was completed by Johns Slater & Haward engineer Colin Bowen in 2016.

Click the image to visit  featured article at CIBSE Journal

Click the image to visit featured article at CIBSE Journal

established in 1907

Competent, Friendly and Helpful 

Our Team

Diverse, Focused and Innovative

Our Expertise

Extensive, Reflective and Varied

Our Experience

Contact Us

Drop us a line!

Better yet, see us in person!

We are always pleased to meet with our Clients, so feel free to make an appointment during normal business hours.

Johns Slater and Haward

Ardennais House, 6 Sorrel Horse Mews, Grimwade Street, Ipswich, Suffolk, England IP4 1LN, United Kingdom

(01473) 255965


Monday - Friday: 8:45am - 5:15pm