Where is the best place to install the solar collectors (i.e. panels/tubes)?
Ideally the collectors should be south facing, usually on the roof of a dwelling or they can be mounted on a frame attached to a wall of a dwelling or even ground mounted. However, there is a good deal of tolerance with solar thermal systems and their efficiency will only decrease by a small amount if the collectors face anywhere between south east and south west. If you only have east and west facing roofs, collectors can still be installed on each of these roofs but costs will increase as you will require more collectors than would be the case on a south facing roof. North facing roofs are not acceptable for solar thermal systems.