When operating cooling and heating equipment simultaneously, what is permissible?

When operating cooling and heating equipment, the principle of efficiency and energy conservation comes into play. Typically, running both systems at the same time is discouraged because it leads to increased energy consumption and can cause strain on the equipment. When heating and cooling systems operate concurrently, they work against each other, as one system is trying to heat the space while the other is trying to cool it down. This not only reduces the effectiveness of both systems but can also result in higher utility bills and potential wear and tear on the equipment, leading to costly repairs. Therefore, the guiding principle is that for optimal performance and safety, both systems should not be used simultaneously.