Oil Fired Boilers generally require Day Oil Tank to store oil and this oil is transported to a burner through oil piping and oil pump.
On the other hand, High-Efficiency Gas Fired Boilers are exactly same as Oil Fired Boilers in construction and the only difference is the transportation of gas to burner requires gas train which comprises of the gas regulator that regulates pressure, the gas strainer to remover dirt from gas while no such valves are required in oil fired boilers.
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