Active systems usually are better than passive ones. 1st learned that from designing solar hot air panels.
I agree as i ran undercurrents previously, but far too much maint. i need not do anything with the PPK
Active systems usually are better than passive ones. 1st learned that from designing solar hot air panels.
I agree as i ran undercurrents previously, but far too much maint. i need not do anything with the PPK