【Perfect Compatible with Honeywell HFT600T Filter T】4 pack premium HFT600 humidifier wicking filters are specifically designed to fit Honeywell HFT600 Series, HEV-600 Series: HEV615, HEV615B, HEV615W, HEV620, HEV620B, HEV620W, HEV-615, HEV-615B, HEV-615W, HEV-620, HEV-620B, HEV-620W, Compare to part # HFT600T & HFT600PDQ..【Cost-effective Package】- Our package contains 4 premium replacement Honeywell HFT600 Filter T filters for your Honeywell HEV615 & HEV620 humidifiers. Upgrade environmental filter paper with durable material and a diamond-shaped grid structure. Enhances product performance and maximizes your compatible Honeywell HFT600 filter moisture output..【Maximize Filters Performance】Our “T” wicking filters (HFT600) made of professional filter paper, adopt honeycomb pad design, allows for maximum absorption of water for optimum moisture output.For best optimal performance, flip your compatible Honeywell humidifier filter HFT600 replacement daily and only fill humidifier tank with distilled water. Hard water degrades humidifier replacement fil-ters and yellows them prematurely..【Care of “T” Filter】The time of HFT600 wicking filters last depending on use and the hardness of your water. As the filter absorbs minerals, it will become very stiff and slowly stop being able to wick up water. It should be changed when cannot wick up water. It is recommended to replace the filter every 1-2 months. Can simply wash the filter and the bottom tray every 1-2 weeks. Soaking it in bucket with a mixture of white vinegar and water will clean it right up. The tray can easily be cleaned with dish soap..【Buy with Confidience】 iSingo has been committed to providing all customers with high-quality and cost-effective replacement filters and helping customers build a better living environment. We provide a 90-days warranty or refund for each customer, we value each customer, and our after-sales team will provide each customer with satisfactory service.