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What is the best way to define a Positive and Negative Pressure Boiler.
Discuss Positive Pressure / Negative Pressure Boiler in the Plumbing Jobs | The Job-board area at PlumbersForums.net
What is the best way to define a Positive and Negative Pressure Boiler.
Technically new premix burners are positive pressure, but not in the conventional sense. The fan is not putting the case under positive pressure.So negative is when the fan is sucking poc from the chamber and creating a negative pressure inside, How is it classed with the pre mix burner as in the HE boilers are they positive ?
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