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3 Cards in this Set
- Front
- Back
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What is excess air? |
A quantity of air,that is greater than what is required for combustion. |
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Why is excess air necessary? |
To ensure the fuel will have enough oxygen so it will be completely burned, and to ensure the heat exchanger will not be overheated to the point of destruction. |
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What should the volume of excess air be? |
40% times the volume of gas being supplied. |
