Which statement is true regarding refrigerant blends with temperature glide?

Refrigerant blends that exhibit temperature glide consist of multiple refrigerant components, meaning that they do not change phase (from liquid to vapor) at a single, fixed temperature. Instead, they transition over a range of temperatures, creating what is known as temperature glide.

Precise charging techniques are crucial when working with these blends because an accurate proportion of the individual refrigerants is needed to maintain the intended cooling performance and efficiency. If the proportions are not correct, the system may operate inefficiently or not cool effectively due to the differing evaporating and condensing temperatures of the components in the blend. Moreover, adding or recovering the refrigerant in a way that preserves the balance of the mixture helps ensure proper functioning of the HVAC system.

This requirement for precise handling and charging is in stark contrast to pure refrigerants, which change phase at a single temperature, making them easier to charge and manage. Understanding this intricacy is fundamental when dealing with refrigerant blends and temperature glide.