Dear Jim: I would like to use some free solar heating in a south-facing kitchen. I cannot afford to have a system installed professionally. What type of simple solar heater can I build myself for one ...

I would like to use some free solar heating in a south-facing kitchen. I cannot afford to have a system installed professionally. What type of simple solar heater can I build myself for one room? For ...

Dear Jim: I have a room that is chilly. It faces south, but has only one small window for the sun to shine in. Is there any inexpensive simple-to-build solar heaters I can put in the window for more ...