https://www.castlefilters.com/journal daily 0.75 2025-05-09 https://www.castlefilters.com/journal/is-it-flowers-youre-after-4w9ks monthly 0.5 2021-04-23 https://images.squarespace-cdn.com/content/v1/5ce6d339a8ffbf0001a8fb20/1559835859718-NIKEC0QXSGRAH1IFHF2H/image-asset.gif Journal - Is It Flowers You’re After? https://www.castlefilters.com/journal/searching-for-succulents-jcr8l monthly 0.5 2021-04-23 https://images.squarespace-cdn.com/content/v1/5ce6d339a8ffbf0001a8fb20/1559835965726-7ONOP3XYI02JGDRBKR3A/image-asset.gif Journal - Searching for Succulents? https://www.castlefilters.com/our-story daily 0.75 2020-05-06 https://images.squarespace-cdn.com/content/v1/5ce6d339a8ffbf0001a8fb20/1560446521854-TDUPBZUSA14IJEXD2N03/plant-textures-2.jpg About Us https://www.castlefilters.com/buy-old daily 0.75 2021-05-17 https://www.castlefilters.com/home daily 0.75 2020-05-06 https://images.squarespace-cdn.com/content/v1/5ce6d339a8ffbf0001a8fb20/1559336262121-F2XXEVXYV1ANF0RJZ0RK/Plant_05_3x2_v02.gif Home https://images.squarespace-cdn.com/content/v1/5ce6d339a8ffbf0001a8fb20/1559336292476-IZDINH3Y413BHLMHXYJS/Plant_04_3x2_v02.gif Home https://images.squarespace-cdn.com/content/v1/5ce6d339a8ffbf0001a8fb20/1559835300319-AP29DHD68LHDZY17G6D4/giftcard-template.jpg Home - Give the Gift of Greenery Plants are as thoughtful a gift as flowers and last much longer. With a gift card, you can brighten up someone’s home, office or dorm room with a potted plant of their choice. They’re available in any denomination and we’ll mail it for free! https://www.castlefilters.com/learn daily 0.75 2021-08-03 https://images.squarespace-cdn.com/content/v1/5eab6ea9c5834365673fc4aa/1603130619732-DH22ISIXK208WKC4WQCG/mediacompare-2.jpg Learn More https://images.squarespace-cdn.com/content/v1/5eab6ea9c5834365673fc4aa/1603130665635-L0Q9XYG754H8HNG6ANEA/mediacompare-1.jpg Learn More https://images.squarespace-cdn.com/content/v1/5eab6ea9c5834365673fc4aa/1607127039048-P1A1DI9AQLNRZ75RZF47/comparedtoothers-01.png Learn More - The perfect filter, by design. Castle Filters are designed to be the ideal blend of flow and filtration while lasting 4-12x longer than traditional filters. Our MERV 8 filters capture around 90% of 5-micron particles (a human hair is 75 microns in diameter, and most dust is around 25 microns) while offering flow rates comparable to or better than the competition. https://images.squarespace-cdn.com/content/v1/5eab6ea9c5834365673fc4aa/1606950928050-G7AAW8UD95QVJ5B0ZS1P/Graphcompares-03-01.png Learn More https://images.squarespace-cdn.com/content/v1/5eab6ea9c5834365673fc4aa/1606950944431-5KJB3UA9A69W55E5192L/Graphcompares-03-02.png Learn More https://www.castlefilters.com/about-us daily 0.75 2020-12-04 https://www.castlefilters.com/privacy-policy daily 0.75 2021-02-23 https://www.castlefilters.com/terms-and-conditions daily 0.75 2021-02-23 https://www.castlefilters.com/videos daily 0.75 2021-08-03 https://www.castlefilters.com/castlehome daily 1.0 2023-06-13 https://images.squarespace-cdn.com/content/v1/5eab6ea9c5834365673fc4aa/7d64ed03-39a0-4b40-a944-3c8ed2ab50c1/raings-cust01-01.png Castle Filters Home - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5eab6ea9c5834365673fc4aa/b9213233-e24d-4490-8032-152241050593/raings-cust02-01.png Castle Filters Home - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5eab6ea9c5834365673fc4aa/635c7aec-fd76-454c-8977-d72ae61eab6c/raings-main.png Castle Filters Home - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5eab6ea9c5834365673fc4aa/b0016898-aa3c-44f5-8db1-3dc84ef4b27f/raings-cust03-01.png Castle Filters Home - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5eab6ea9c5834365673fc4aa/8c38adab-a555-4d8f-ab4f-7dc6fcab11a5/Filter_SampleM8.png Castle Filters Home - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5eab6ea9c5834365673fc4aa/f49b2f32-c9cb-42e2-a298-1a438ff60496/1stproductshots-4.jpg Castle Filters Home - How can a one-year filter save me time and money? A close-up of Castle Filters’ patented triple foam design. https://images.squarespace-cdn.com/content/v1/5eab6ea9c5834365673fc4aa/ce76eea7-52c1-469f-9a21-79f9787e6492/Filter_SampleM6.png Castle Filters Home - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/5eab6ea9c5834365673fc4aa/88aa0711-0fee-4960-8320-f229e199ec9f/icons.png Castle Filters Home - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.castlefilters.com/technical daily 0.75 2022-06-01 https://images.squarespace-cdn.com/content/v1/5eab6ea9c5834365673fc4aa/972e69ec-316e-429b-8486-cfba13d784c0/1stproductshots-4.jpg Technical - Patented Dust-Stopping Effectiveness Castle Filters filtering media is comprised of 3 sheets of 1⁄4” filtering media for a total of 3⁄4”. Pleated filter media thickness is measured in millimeters. This gives the Castle Filter 10x more dirt stopping area to capture 10x more contaminants than a pleated filter. Pleated filters will only hold around 15 grams of dust before they fail. An average household HVAC filter collects about 1 gram of dust per week, so pleated filters need to be replaced about every 30-90 days for optimal performance. Castle Filters static pressures are hardly affected until it has about 80g of dust and will hold up to 123 grams of dust before complete failure. Castle Filters can stop and “pack away” 10x more dust than a pleated paper filter – due to its patented filtering media of tackified, porous cellular material. The cell walls of the material are made sticky and tacky with our treatment, then when the dust hits the sticky “wall” it is adhered to it. The walls pack the dust up but the center of the cell allows air flow to continue. https://images.squarespace-cdn.com/content/v1/5eab6ea9c5834365673fc4aa/5d6ecaf6-2f56-4c41-b7d4-87086d055382/Screen+Shot+2022-05-24+at+8.36.11+PM.png Technical - 5-10 micron dust Pleated MERV 8 73% Pleated MERV 11 88% Castle High-Flow 93% All dust sizes Pleated MERV 8 72% Pleated MERV 11 79% Castle High-Flow 84% https://images.squarespace-cdn.com/content/v1/5eab6ea9c5834365673fc4aa/dbc60469-4497-4a0a-952c-9da3c445b944/Screen+Shot+2022-05-24+at+7.56.28+PM.png Technical - Pressure drop when new: Pleated MERV8 .211”H2O Pleated MERV 11 .259” Castle High-Flow .235” 8 weeks: Pleated MERV 8 .595”H20 Pleated MERV 11 .407” Castle High-Flow .261” https://www.castlefilters.com/contact-us daily 0.75 2025-05-09 https://www.castlefilters.com/castle-store daily 0.75 2020-05-07 https://www.castlefilters.com/castle-store/p/buysingle monthly 0.5 2024-07-08 https://images.squarespace-cdn.com/content/v1/5eab6ea9c5834365673fc4aa/1607134085115-1GL1US1IK8GH50VV6RRK/castlefront_cutout.jpg Castle Store - Individual Filters https://images.squarespace-cdn.com/content/v1/5eab6ea9c5834365673fc4aa/1607134084833-9RK4JR23ZEQ8SROVQFK0/castlefrontM6_cutout.jpg Castle Store - Individual Filters