Your house, if you own one that is, also needs to have a roof with the right angle and alignment for solar collectors to be feasible. It is hard to find a gener

Your house, if you own one that is, also needs to have a roof with the right angle and alignment for solar collectors to be feasible. It is hard to find a general rule for building houses. Solar collectors make sense, even the economic aspects. If people actually have the money to spend on them, they probably will do so anyway.