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Open Greener House- making a listed building low energy


  • 12 Saint Swithun Street Winchester, England, SO23 9JP United Kingdom (map)

St. Swithun Street, Winchester, Hampshire, SO23 9JP

An opportunity to see how the owners have tackled the need to reduce energy consumption in a grade 2 listed building in a conservation area, in ways approved by conservation officers.

This is one of three great events Winchester Action on Climate Change have organised for Heritage Open Days 2019, please see look for the other 'Open Greener House' entries for details of the other events.

  • Thursday 19 September: 1000-1600

  • Friday 20th September: 1000-1600

  • Saturday 21 September: 1000-1600

Only 20 people will fit into the house at a time, so to avoid waiting we recommend booking your arrival time. It is not essential however to book if you are happy to wait on arrival should the house be full.

A wonderful opportunity to look inside a 17th century house, and to talk with the owners and professionals involved about the pain, joy and ways of reducing the energy use of a 1680s Grade 2 listed house!

Allow around 30 minutes for your visit. Suitable for older, interested children. Please note there is a resident cat

How they have made a listed building low energy

· They have been able to install triple glazing on historic windows by using double secondary glazing.
· They have installed new double-glazed windows by ensuring traditional external and internal appearance and using inert gas filling and a barrel glass external layer.
· A simple heat exchange fan keeps the interior fresh.
· On the rear roof south-facing photo-voltaic cells have been allowed because they are partially concealed.
· Energy-storing batteries help make the best of the limited output of the photovoltaic cells.
· They were able to replace an inefficient conservatory with one with highly efficient triple glazing, with recently-built walls lined with wood-fibre insulation.
· Some walls that are solid and thin have been ‘papered’ with V600 thermal liner.
· On the cold ground floor, a layer of high-efficiency insulation has been added below the wooden floorboards.
· They added extra insulation in the loft.
· A new high-spec wood burning stove was installed before the owners knew about the air pollution caused by stoves. Unused, it still prevents heat being lost up the chimney.

Earlier Event: September 19
Guided tour of Old Hyde House on Hyde Street
Later Event: September 19
Winchester College - Guided Tour