Some principles of passive solar design remain the same in every climate. An important aspect of good passive solar design is that it takes advantage of the opportunities at the specific site. So, many fundamental aspects of passive solar design will depend on the conditions in a small local area, and even on the features of the building site. Considering Fort Knox, we have:
_ Energy Conservation:
    insulation levels, control of air infiltration, glazing type and location. mechanical equipment and energy                                            efficient appliances.
The most important measures for improving the house's basic ability to conserve the heat generated either by the sun or by the house's conventional heating system are in the following areas:
• Insulation • Air lnfiltratlon • Non-solar glazing