If HW supply temp is 100°F and CW incoming temp is 40°F, the temperature rise is:

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Multiple Choice

If HW supply temp is 100°F and CW incoming temp is 40°F, the temperature rise is:

Explanation:
The main idea is that temperature rise is the increase in water temperature as it passes from the incoming cold water to the hot water that is supplied. It’s found by subtracting the cold inlet temperature from the hot supply temperature. Here, 100°F minus 40°F gives a rise of 60°F. This represents how much the water is heated in the system. If you needed the energy involved, you’d use the flow rate and the water’s specific heat to compute BTU per hour, roughly: BTU/h ≈ flow (gpm) × 8.33 × delta T.

The main idea is that temperature rise is the increase in water temperature as it passes from the incoming cold water to the hot water that is supplied. It’s found by subtracting the cold inlet temperature from the hot supply temperature. Here, 100°F minus 40°F gives a rise of 60°F. This represents how much the water is heated in the system. If you needed the energy involved, you’d use the flow rate and the water’s specific heat to compute BTU per hour, roughly: BTU/h ≈ flow (gpm) × 8.33 × delta T.

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