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Ihuman Case Study
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Gas Fitter 2 Practice Test
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Question Number 34
The temperature of the water returning from the heating loop in a combination system employing a water heater for domestic hot water and space heating must be:
A. higher than the outlet temperature from the water heater
B. no more than 5°C (9°F) below the outlet temperature from the water heater
C. lower than the minimum temperature required to activate the burner
D. at least the set temperature of the domestic hot water supply
✔ Correct Answer:
C. lower than the minimum temperature required to activate the burner
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