Here are entered works on additions to buildings which act as high-performance heat collectors or provide additional solar heated living or recreational space. Works on solar heated rooms or buildings used primarily for gardening are entered under Solar greenhouses.
Here are entered works on additions to buildings which act as high-performance heat collectors or provide additional solar heated living or recreational space. Works on solar heated rooms or buildings used primarily for gardening are entered under Solar greenhouses.
Here are entered works on additions to buildings which act as high-performance heat collectors or provide additional solar heated living or recreational space. Works on solar heated rooms or buildings used primarily for gardening are entered under Solar greenhouses.
