What does it mean when they say it will produce 6 gallon per minute 35 degree rise?

When it is stated that a system can produce 6 gallons per minute (GPM) with a 35-degree rise, it means the system can heat or cool water at a rate of 6 gallons per minute, raising or lowering its temperature by 35 degrees Fahrenheit. This specification is often used for water heaters or cooling systems, indicating their efficiency and capacity to meet specific temperature needs. Essentially, it provides a measure of the system's performance in terms of flow rate and temperature change.