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The Lennox X6661 is the correct replacement cabinet for the following air cleaners:
The Lennox X6661 Healthy Climate Filter Cabinet is a replacement filter cabinet for Lennox Healthy Climate air cleaner models HC10 and HC 16. This air filter cabinet measures approximately 20x25x5 and is also known as the HCC20-28. While this Healthy Climate cabinet does not include a filter, the X6661 helps provide whole-house filtration for optimal home comfort and air quality, with no additional energy costs. This cabinet is a genuine Lennox OEM part and is made from durable material.
Lennox X6661 Healthy Climate Filter Cabinet specifications: