Screedless underfloor heating is well suited to water temperatures from heat pumps

Published:  06 July, 2011

Timoleon, underfloor heating
An air-to-water heat pump and Timoleon underfloor heating are important elements in the major upgrading of the energy profile of this listed building in Devon.

The upgrading of a listed building in the Dartmoor national park to provide a new headquarters for a market research company is one of the first installations of Timoleon’s Aether Dry ‘screedless’ underfloor heating system. Compared with systems installed in wet screeds, it can operate with flow temperatures up to 10 K lower, making it well suited to the air-to-water heat pump that is the main energy source.

Formerly a railway goods shed, this Grade 2 listed building has been converted into a 2-storey head office for Marketing Means at Ashburton.

Refurbishment work included insulating windows, floors and ceilings to current Building Regulations. Two external walls have also been insulated to a high standard. Elsewhere, however, the original uninsulated stone has had to be retained, giving high heat losses in some areas. To overcome this problem and retain a high COP for the heat pump, Timoleon devised an underfloor-heating solution based on its specially developed products.

The Aether Dry system has been used on the ground floor, with 100 mm Timoleon FoilBoard topped by a floating floor of Screedboard 20. For this project, the pipework centres are 150 mm rather than the standard 200 mm to maximise the COP of the heat pump.

On the upper floor, a Timoleon Toron system has been used to achieve maximum output to overcome the losses through the old stone walls.

The heat pump and underfloor heating systems were installed by local specialist Sungift Solar.

For more information on this story, click here: July 2011, 91

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