77 Grosvenor Street

The objective

The aim was to improve the building's overall energy performance, significantly reduce its operational energy consumption and support the client's ambition for a more carbon-neutral estate.

That meant a full mechanical services refurbishment with a low-carbon heating and cooling system at its core, completed within a condensed programme and finished to a standard that matched the architectural character and prestige of the building.

What we delivered

Low-carbon heating and cooling

Two roof-mounted air source heat pumps were supplied, installed and commissioned as the heart of the building's upgraded heating and cooling strategy. We designed and installed a new seven-storey mechanical riser carrying low temperature hot water (LTHW) and chilled water (CHW) distribution pipework, and fitted out the plantroom with two 3,000-litre buffer vessels, new pumps, pressurisation units and side-stream filtration, all connected using prefabricated flanged pipework assemblies.

Fan coil units

80 new fan coil units were installed, tested and commissioned across every floor, together with all associated low temperature hot water, chilled water and condensate pipework.

Public health

We installed complete public health systems across seven floors, covering boosted cold water services (BCWS), hot water services (HWS), rainwater and soil services. The second-fix package was finished to a high standard with premium sanitaryware, including WCs, basins, water heaters, sensor-activated taps and showers.

Green Scheme irrigation

A dedicated water irrigation system supports the building's environmental Green Scheme, helping to keep its landscaped areas sustainable for the long term.

The team

A team of more than 20 qualified engineers, from senior project managers to distribution operatives, delivered the works within the required timeframe.

The outcome

The project is complete. 77 Grosvenor Street now runs on a low-carbon heating and cooling system designed to reduce operational energy use, with every element finished to the client's exacting standards for both technical quality and appearance.