Solar Heat Harvester System

Recent research and product development permits operating costs of current home heating Systems to be compared with new Solar Heat Harvester systems.

Why use Solar Heat Harvesting systems? - because they are:
    The most efficient home heating system available
    AHH and CHH annual heating cost savings 10 to 50 times less expensive to run than your current heating system
    Use a renewable energy source
    Inexpensive to buy and easy to install
    Very reliable, and need little if any maintenance

Attics and conservatories can capture many 100's of kWh's of free heat from the sun. The Solar Heat Harvester system is an ultra-efficient new secondary home heating system that transfers this free heat into homes reducing the use of far more expensive alternative heating systems.

Of course solar heat harvesting is dependent on solar heat, which is not always available, but you may be surprised at how much solar energy is collected and . stored in parts of your home. Because solar heat harvester systems have such low installation and running costs it is a very valid secondary home heat source which will considerably reduce home heating costs.

This website has many pages, two describe detailed case studies showing Attic and Conservatory Heat Harvester Systems (CHH) performance.

In October 2017 the UK average annual home space heating costs and use obtained from are shown in the first two columns in the table below. The third column is calculated by dividing the first column value by the second giving the heat cost per kWh.

Home Space Heating Costs
Data from
Heat Used
Cost per
Oil fuelled central heating£45412,500£0.036
Ground source heat pump£46012,500£0.037
Air source heat pump£50012,500£0.040
Gas fuelled central heating£60913,500£0.045
LPG fuelled central heating£80912,500£0.065
Electric central heating£205313,500£0.152

The first histogram below shows 2017 annual space heating costs.

Average home heating and space heating costs

In 2017 the average annual Home Space Heating Costs ranged from £454 to £2,053.

relative home heating and space heating costs

Comparative UK home heat cost per kWh.

Two types of Solar Heat Harvesting system have been researched, developed and tested during the last seven years. Attic Heat Harvester Systems (AHH) transfer solar heated attic air from the attic apex into the home, Conservatory Heat Harvester Systems (CHH) transfer free solar heated conservatory air from it's apex into the home.

If during periods of the year your home has rooms that need heating when other areas get hot due to renewable solar heat from the sun, the Solar Heat Harvester System can transfer the free solar heat into your home at little to no cost. Solar Heat Harvesting systems have many advantages, one is that it reduces the operating time and hence maintenance cost of your current home heating system potentially saving many £10's or £100's on your fuel bills every year and reduces your carbon footprint.

Home attics, especially those with slate or vinyl tiled roofs, and conservatories, can get surprisingly hot (35°c to 50°c), even on partly cloudy days. How and where solar heat harvesting works.

ThermoPro P60 remote temperature monitor - ideal for use with our attic and solar heat harvester If you don't know how hot the air at a high point in your attic or conservatory gets, you can check it by buying an inexpensive wireless remote temperature monitor, some also record maximum and minimum temperatures.

The ThermoPro P60 is supplied with a remote temperature monitor.

Solar Heat Harvester - the most efficient home heating system available?

The impact of a Solar Heat Harvester on home temperatures is shown in the next chart.

Impact of space heating costs of our Attic / solar heat harvester

The chart shows temperatures in a scottish home, shown below, both without (17,18 July) and with (19 to 23 July) the Attic Heat Harvester System operating.

When the attic temperature (red line) exceeds the room temperature (green line), shown by areas H, it indicates that Attic Heat Harvesting is very practical. With a temperature difference of just 1°C the system makes it the most efficient home heating system available.

The blue line shows outdoor temperatures, the dotted blue line average outdoor temperatures. The impact of using heat from the attic is shown initially on July 19. The room temperature begins to rise when the system fan/blower is turned on by the custom controller. The rate of rise in attic temperature slows as the blower is running until the room temperature reaches the maximum user preset temperature, 23°c, when the blower is turned off. The attic temperature then rises rapidly as shown in the chart.

Temperatures were measured and recorded using a data logger. When operating, the average room temperature, shown by the green dashed line, increased initially by 3°c then by 4°c. The total operating cost of the system for four days was £0.27, and for the year £4.51 when 598 kWh were harvested.

The extraordinary low heat cost per kWh from our Solar Heat Harvester systems results because the heat is free and, in contrast to ground and air source heat pumps, the cost of transferring the heat to the home is almost negligible. Pages in this website detail the theory behind the system, what it is and how well it works.

The future of our planet and mankind's descendants is in our hands, the lifestyles most of us lead are destroying Mother Earth. Just one aspect of this is the rate at which we are consuming fossil fuels, it took 60 billion years of the suns energy to produce them, we are currently burning them in decades.

Earths inhabitants must dramatically reduce their energy consumption wherever possible by switching to renewable energy. One way to do this is to make the most of solar heat to heat our homes.