Side channeling is caused in granular canisters when the air seeks the path of least resistance and flows down the sides of the canister at a higher rate than through the center of the adsorbent bed. This causes premature CO2 strikethrough and leaves unused adsorbent in the center of the canister.  This in turn reduces the duration of the canister.
					ExtendAir cartridges use controlled channeling to ensure full utilization of the adsorbent. The reaction zone in an ExtendAir cartridge is very narrow and consistent which results in a tight range of duration no matter who loads the canister. This performance is engineered in advance, leaving little chance for error.
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