What is the general guideline for temperature rise in a heating system?

The guideline for temperature rise in a heating system indicates that the rise should typically be between 25°F to 30°F. This range is considered optimal because it balances efficiency and comfort. A temperature rise within this range ensures that the system is able to effectively transfer heat into the living space without causing excessive strain on the heat pump or furnace. If the temperature rise is too low, it may indicate that the system is not transferring enough heat, potentially resulting in insufficient heating. Conversely, if the rise is too high, it could lead to reduced efficiency and might even damage the system over time.

Choosing a temperature rise outside of this optimal range, such as above 20°F, does not provide the same effectiveness in heat distribution and comfort. Similarly, while a rise not exceeding 35°F might seem acceptable, it can lead to inefficiencies and potential system failures. Maintaining a constant 40°F is not practical or standard for heating systems, as it does not reflect the dynamic operational needs of most HVAC systems designed to manage fluctuations in temperature demand.