Clerestories are excellent for lighting and heating.  This comparison of Clerestories with Sunbender reflector/shades over a skylight demonstrates the limitations of fixed exposure to the sun (Fig. 19) and the performance over a year’s time in Albuquerque, NM (Fig. 20).

                                                       Fig.19

      SUNBENDER 2.5’ x 20’                             CLERESTORY 2.5’ x 20’

1.  Subtracts 50 sq.ft. of roof                  1.  Adds 41 sq.ft. of roof and 23 sq.ft. of end wall

2.  No extra structure                             2.  Second house on top of house

3.  Adjustable                                         3.  Fixed

4.  Directs sun to floor below                  4.  Floor receives no winter sun

5.  Admits heat during March                  5.  Admits to much heat in August and September;

      and April; blocks it in August                  admits too little during March and April.

      and September.

6.  Easy roof drainage                             6.  Complicated roof drainage

7.  Can be used with Big Fin                    7.  Can’t be used for heating water in summer  year-round.                                                  without extra reflector.

Fig. 20

 Year-Long Performance in Albuquerque, New Mexico