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What gas pressure is typically required at the manifold and burners of a natural gas furnace?

  1. 2.0 in WC

  2. 3.5 in WC

  3. 4.5 in WC

  4. 5.0 in WC

The correct answer is: 2.0 in WC

The other options are incorrect because they are too high in gas pressure for a natural gas furnace. A pressure of 2.0 in WC is considered standard for most furnaces and is sufficient to provide proper combustion and heat output. Higher gas pressure can cause damage to the furnace and increase the risk of carbon monoxide gas leaking into the home. It is important to follow the manufacturer's recommended gas pressure for optimal performance and safety.