CONCLUSION

INTRODUCTION

PARTICIPANTS

HYPOTHESIS

RESEARCH

INTERVIEW

PICTURES

There is NOT a greater loss of heat through the back wall then there is heat gain from the light bulbs in the front section.  

We have dis-proven our hypothesis that heat loss through the rear wall totals 192 KBtu/day ---whereas---- heat gain from incandescent lights totals 458 KBtu/day

If all the surfaces, the roof, walls and slab on grade are taken into consideration, the heat loss for the whole rear addition totals 422 KBtu/day ( in winter) without heat loss from ventilation. With this loss, the total comes to 521 KBtu/day (in winter).

The enormous lighting power density of the main sales floor and poor insulation of the rear addition seem approximately coupled by their inverse proximity.

One factor that our computer model didn't consider, was that the books against the west wall act as insulation, but the wall was still considerably (20 deg F) colder than the bookracks.  This in consideration, it is still likely that by both adding more insulation to the rear wall, and removing some of the lightbulb fixtures (or finding a way to bypass them) that The Bookpeople could save half their possibly $8,000 utility bill.