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The AO Smith Inner Door, Opening, Large, Lo-nox, with MPN 100066377, is designed for residential water heater systems. This component ensures proper venting and gas combustion, enhancing the efficiency of your water heater.
The Inner Door is essential for maintaining safe and effective operation of your water heater.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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