https://www.spiralregister.com/terms-conditions daily 0.75 2026-01-06 https://www.spiralregister.com/installation daily 0.75 2026-01-06 https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/1534958108901-9UJ64T1LVKTDU9PB2IZA/instructions1.png Installation https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/1538696762086-HO2HJWM77F4LZSD4ELNK/step1r.PNG Installation https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/1537714123693-Q81VQMV2ETZG11YFHHQZ/step2r.PNG Installation https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/1537714148520-2YW6O19N9BDL5WMDDXY8/step3r.PNG Installation https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/1537714180843-NN1OR7T1R83SNS98NC0I/step4r.PNG Installation https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/1534958108901-9UJ64T1LVKTDU9PB2IZA/instructions1.png Installation https://www.spiralregister.com/terms-conditions-1 daily 0.75 2019-09-10 https://images.squarespace-cdn.com/content/v1/54061d7fe4b0ee7f1c8414eb/1411660422242-ORQEXHJ2E55H0VPIJMGL/plain_blue.png Terms & Conditions https://www.spiralregister.com/shipping-returns daily 0.75 2026-01-06 https://www.spiralregister.com/contact daily 0.75 2026-02-19 https://www.spiralregister.com/coming-soon-new daily 0.75 2026-02-19 https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/ff93a70d-1a1f-4851-b40a-826ecd7ea253/2024+slot.jpg NEW PRODUCTS - 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/v1/5b11e0617c932748b43686ed/ff93a70d-1a1f-4851-b40a-826ecd7ea253/2024+slot.jpg NEW PRODUCTS - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.spiralregister.com/technical daily 0.75 2026-02-19 https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/bf5b15f2-7df7-4073-ba7b-968ff276d1a2/sr827+perf+data+R1.png TECHNICAL - 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/v1/5b11e0617c932748b43686ed/df513496-54d7-4268-a1d9-45e1de33d657/SR831+perf+data+R1.png TECHNICAL - 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/v1/5b11e0617c932748b43686ed/abcfd369-6ad8-4291-bd9c-61a7ce6f0027/SR827+MOUNT.JPG TECHNICAL - 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/v1/5b11e0617c932748b43686ed/a54709e1-ef90-42b5-b7a2-0b9868fecd69/SL320+PERF+DATAsm.png TECHNICAL - SL320 Model SL320 is an open slot style diffuser designed to fit to the radius of all spiral ductwork having a diameter of 8” and larger. The diffuser can be utilized in either supply or return air applications. This diffuser can also be installed on standard rectangular ductwork. The smooth aluminum surface and rear sealing gasket provides for an attractive fit and finish. Integral to the design are standoffs which provide for screw locations, duct sealing and uniform spacing. https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/c599a73b-7f88-49ce-842e-df5b6a10a5ed/PERDATA420sm.png TECHNICAL - SL420 Model SL420 is an open WIDE slot style diffuser designed to fit to the radius of all spiral ductwork having a diameter of 16” and larger. The diffuser can be utilized in either supply or return air applications. This diffuser can also be installed on standard rectangular ductwork. Like the SL320, the smooth aluminum surface and rear sealing gasket provides for an attractive fit and finish. Integral to the design are standoffs which provide for screw locations, duct sealing and uniform spacing. https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/bf5b15f2-7df7-4073-ba7b-968ff276d1a2/sr827+perf+data+R1.png TECHNICAL - 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/v1/5b11e0617c932748b43686ed/df513496-54d7-4268-a1d9-45e1de33d657/SR831+perf+data+R1.png TECHNICAL - 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/v1/5b11e0617c932748b43686ed/abcfd369-6ad8-4291-bd9c-61a7ce6f0027/SR827+MOUNT.JPG TECHNICAL - 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/v1/5b11e0617c932748b43686ed/1696803240120-D06FQI3XCIY0C5HFD8QN/step1.png TECHNICAL https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/1696803240148-JDHHX9BMR61W0GDLRZ3U/step2.png TECHNICAL https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/1696803241055-P04JHQXOIVOAZ607RRKM/step3.png TECHNICAL https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/1696803241087-QGISGWAL09U14MTJDS8Y/step4.png TECHNICAL https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/a54709e1-ef90-42b5-b7a2-0b9868fecd69/SL320+PERF+DATAsm.png TECHNICAL - SL320 Model SL320 is an open slot style diffuser designed to fit to the radius of all spiral ductwork having a diameter of 8” and larger. The diffuser can be utilized in either supply or return air applications. This diffuser can also be installed on standard rectangular ductwork. The smooth aluminum surface and rear sealing gasket provides for an attractive fit and finish. Integral to the design are standoffs which provide for screw locations, duct sealing and uniform spacing. Check out the “Scratch-and-Dent” models listed on the shopping page! https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/c599a73b-7f88-49ce-842e-df5b6a10a5ed/PERDATA420sm.png TECHNICAL - SL420 Model SL420 is an open WIDE slot style diffuser designed to fit to the radius of all spiral ductwork having a diameter of 16” and larger. The diffuser can be utilized in either supply or return air applications. This diffuser can also be installed on standard rectangular ductwork. Like the SL320, the smooth aluminum surface and rear sealing gasket provides for an attractive fit and finish. Integral to the design are standoffs which provide for screw locations, duct sealing and uniform spacing. https://www.spiralregister.com/home-1 daily 0.75 2026-01-06 https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/1568073176183-CWNWIR658K4VCESOZY45/step1r.PNG Home Instruction slide showing step 1 of a process, which involves tracing around a template and marking hole locations, with an image of a metal pipe with a cutout. https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/1568073177360-YK3XNKW8QVSNQWRU6WBF/step2r.PNG Home https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/1568073192268-PEL3AGJFTBWDAWC2EZML/step3r.PNG Home https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/1568073193378-09S5OWOEPCVAIKO4R6T0/step4r.PNG Home https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/1579047643753-M3P0A6BLYU2K7QTXGZ73/FLOOR-REG.jpg Home Floor Registers https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/1579047795353-B8MJVSIXD47UOW3DM7MR/SIDEWALL-REG.jpg Home Sidewall Registers https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/1579047927696-23DBAVXTMEXI3AOXJYZJ/RA-GRILLE1.jpg Home Return Air Grilles https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/1547913298001-J82W3RN0G87G1A1H4MVZ/SPECPIC.jpg Home https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/1568072317644-ELDDHSWGKEJO5AVIO7SM/regfin-SMALL1.jpg Home https://www.spiralregister.com/home-2 daily 1.0 2026-02-19 https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/bdd849a8-6647-4b53-a841-97d7a162ba2d/sr827q.jpg Home https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/1701559656221-Z45KLP7I8L1WYKQUCYK5/SR827+MOUNT.JPG Home https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/1623195279422-WLS3DTKY9RF8PQFL87X6/Duct+4r.png Home https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/1623194330968-NZTFJYQCNQYNZ6J1PSPN/Duct+1.png Home https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/1701559643294-BDQH56GZRUKPARC545TM/PXL_20230921_232754947.jpg Home https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/1623195038031-EU5NA9ANFSQIJLCQT89D/slotsealtoduct.png Home https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/1688343061023-FV6FUXOMCXM315CY4XI0/duct+5.png Home https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/84db180a-d39f-41a8-8460-0e66b4ed6ce8/sr827n.jpg Home https://www.spiralregister.com/shop-1 daily 0.75 2026-01-06 https://www.spiralregister.com/shop-1/p/sr831-6x18 monthly 0.5 2026-01-24 https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/1683245306483-9DE6SQQE25LJEWHY8IHX/PXL_20230504_215716013.jpg Shop - SR831 6X18 https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/1683245282702-XTUYEN1FIUFKMMAOLGXT/PXL_20230504_215341778.jpg Shop - SR831 6X18 https://www.spiralregister.com/shop-1/p/sr827-6-x-12 monthly 0.5 2026-03-21 https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/1683245282702-XTUYEN1FIUFKMMAOLGXT/PXL_20230504_215341778.jpg Shop - SR827 6 x 12 https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/1683245306483-9DE6SQQE25LJEWHY8IHX/PXL_20230504_215716013.jpg Shop - SR827 6 x 12 https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/68ede249-dcba-49b7-bea1-2e3fdcb1df43/sr827+ico.jpg Shop - SR827 6 x 12 https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/1712268447165-53AEBY9HDEH8OR5D2B33/SR827-288.jpg Shop - SR827 6 x 12 https://www.spiralregister.com/shop-1/p/sr320-slot-diffuser monthly 0.5 2026-03-21 https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/1619284525226-U2IDCGB7L0WLY5CV8X0O/slotonduct1.png Shop - SL320 Slot Diffuser https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/1619284483612-ERLVFWD97CZMJCKYO0EQ/slotsealtoduct.png Shop - SL320 Slot Diffuser https://www.spiralregister.com/shop-1/p/sr320-slot-diffuser-9ktjf monthly 0.5 2025-10-04 https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/ff93a70d-1a1f-4851-b40a-826ecd7ea253/2024+slot.jpg Shop - SL420 Wide Slot Diffuser https://images.squarespace-cdn.com/content/v1/5b11e0617c932748b43686ed/1619284483612-ERLVFWD97CZMJCKYO0EQ/slotsealtoduct.png Shop - SL420 Wide Slot Diffuser