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- 303.10�— Clearances — Change Summary: Appliances and their vent connectors shall be installed' <br />with clearances from coirnbustible material so operation does not create a hazard to persons or <br />property. <br />- 402.2 — Natural Ventilation — Change Summary: A mechanical ventilation system is not required <br />where: <br />* (a) natural ventilation openings comply with the requirements of Section 402.2 <br />* (b) the zone is not served by heating or cooling equipment, [ASHRAE 62.1:16.4] <br />- 9023 — Use of Air or Oxygen, Under Pressure — Change Summary: Where air or oxygen under <br />pressure is used in connection with the gas supply, effective means such, as a back pressure <br />regulator and relief valve shall be provided to prevent air or oxygen from passing back into the <br />gas piping. Where oxygen is used, installation shalll be in accordance with NFPA 51. [NFPA <br />54:9,1.S] <br />- 904.2 — Clearance — Change Summary: Central heating furnaces and low-pressure boilers shall <br />be provided with clearances in accordance with Section, 904.2.1 through 904.2.9. <br />1310.1.3 — Protection Against Corrosion — Change Summary: Steel pipe and steel tubing installed <br />,underground shalll be installed in accordance with Section 1310.1.3.1 through Section <br />1310.1,3,9, [NFPA 54:7.1.3] <br />Please Note: The Signiificant Code Changes Listed Above Do Not InClUde All Significant Changes to the Code <br />