Improving the design to make an “active” solar energy system - with electrically driven air - frees up the approach to cover much more widespread opportunities.

In addition, the façade can also now be made with strong, lightweight multiwall polycarbonate, frequently used for conservatory roofs and, increasingly, new buildings.

These advances secure three major benefits:

This innovative design has vitally important applications for new buildings. Furthermore, an active system opens up the massive potential of retrofitting millions of existing houses or larger buildings, capable of reducing gigatonnes of carbon dioxide (CO₂) emissions.

Wall areas available on storeys above ground level are also able to be converted, possibly doubling (or more) a project’s energy input and achieving substantial economies of scale.

As a domestic living room is being heated, or after the desired temperature has been achieved, can also heat other cold rooms using the same primary circuit of recirculating internal air.

Additionally, pre-heating domestic hot water can be undertaken at the same time or independently of space heating.

With the rapidly increasing frequency of heat waves from accelerating global warming, there is a massive and escalating problem of overheating in buildings with large areas of south-facing glazing.

A major approach being taken to stop this repeating in future construction projects is to specify highly expensive solar control glass (reflecting sunshine) in new building designs.

Furthermore, highly beneficial underground heat stores would be substantially easier to install before new buildings are erected, with the buildings possibly being placed over them.

Owners of houses and other existing buildings can order a design guide for installing and operating a system.

The design guide will help owners of houses and other existing buildings to maximise the energy efficiency and cost-effectiveness of their system.

If this is the case and it is examined at the design stage of a system, it may be possible to resolve this - and substantially increase the usable size of your house.

Supplying warm to a colder area of the house can be undertaken either when the living room is being heated or after it has achieved comfort temperature.

Depending on the installation, a system is likely to cost well under £200 per square metre (m²).

Adding highly beneficial heat storage will increase the investment slightly but make the overall project much more energy efficient and cost-effective.

systems should be much cheaper to run as well because heat pumps need a lot of electricity to operate.

Air source heat pumps, especially, require much more power in winter because their efficiency - coefficient of performance (CoP) - falls substantially in cold air, compared to that of more expensive ground source heat pumps.

In Europe, North America and other cool, temperate climate countries using space heating, power-hungry heat pumps could increase low carbon electricity demand by terawatts.

Furthermore, the necessary strengthening of electricity transmission networks could delay the much-needed massive increase in renewable electricity supply for a decade.

Meanwhile, global CO₂ emissions have continued to rise and steadily increasing atmospheric concentrations barely show any reducing effect of the covid pandemic economic recession.

To achieve net zero carbon though, residual greenhouse gas emissions from the life cycles of all low carbon technologies need to be sequestered with carbon negative processes.

Please email survey@solarair.me with photographs of your south-facing wall (two if southeast and southwest) of both the external and internal faces, with the orientation as well as the width and height dimensions (in metres).

If you have east or west facing walls with smaller window areas, please also send photographs of these, with orientation and dimensions.

Where the solar wall potential is limited, a system may also be made with a separate solar energy collector over a heat store or adjacent to it, possibly using an existing masonry wall on a nearby outbuilding

It is important too to explain how you heat your living room - continuously with solid fuel (e.g. coal or wood) or intermittently on a timeclock with gas or oil.

If you then order a design guide, for just £1/m² of building floor area (minimum £100), in addition to installation and operation advice, you will also receive guidance on how to maximise the benefits of your system and wider energy/CO₂ saving.

Additionally, alternative designs of heat stores are incorporated, as well as links for specified materials and technologies essential for maximising energy efficiency and cost-effectiveness.

All system owners are requested to send photographs of their completed installation and record their experiences with registered installers, builders and architects on the Members’ webpage.

Any additional suggestions would be warmly received, whether recommendations for improving parts of the design or the use of social media, or proposals from potential supporters or collaborators.