通过简单的计算，可以确定地下室地下热损失的最大速率以及供暖季节的总热损失。该程序解释了一年中地下热损失的变化。这是室内热平衡的一个重要因素。分析数据和实验数据用于开发一组因子，然后用于计算地下热损失。本说明是ASHRAE论文（米塔拉斯1983）的修订版和扩展版。本修订版扩展了整个地下室计算程序，以包括楼板- 地面和浅基底热损失计算。单位:SICitation:Symposium，ASHRAE交易，1987年，第93卷，pt。1，纽约州纽约市

A simple calculation makes it possible to determine the maximum rate of below-grade heat loss from a basement and the total heat loss over the heating season. The procedure accounts for the variation of below-grade heat loss during the year. This is a significant factor in the house heat balance. Analytical as well as experimental data are used to develop a set of factors that are then used in the calculation of below-grade heat loss. This note is a revised and extended version of an ASHRAE paper (Mitalas 1983). This revision extends the full basement calculation procedure to include slab-on-grade and shallow basement heat loss calculations.Units: SI