{"product_id":"nadair-sd-659-32sf-super-duty-hepa-central-vacuum-power-unit-659-aw-32l","title":"Nadair SD-659-32SF Super Duty HEPA Central Vacuum Power Unit, 659 AW, 32L","description":"\u003ch2\u003eQuick Summary\u003c\/h2\u003e\n\u003cp\u003eThe Nadair SD-659-32SF is a Super Duty central vacuum power unit with 659 airwatts, 144.9 inches of water lift, and 135.8 CFM of airflow. Its 32 L aluminum canister, hybrid filtration, self-cleaning True HEPA filter, and 65 dB noise level make it a practical choice for homeowners upgrading a whole-house vacuum system.\u003c\/p\u003e\n\u003cp\u003eAuthorized Nadair Dealer Ace Vacuums can help you confirm compatibility with your existing piping, choose the right hose and attachment kit, and size the central vacuum system for the home and piping run. The unit includes one triple-layer disposable bag and one True HEPA self-cleaning filter; the hose and cleaning tools are sold separately.\u003c\/p\u003e\n\u003ch3\u003eQuick Highlights\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e659 airwatts with 144.9 inches of water lift\u003c\/li\u003e\n\u003cli\u003e135.8 CFM airflow and 65 dB operating noise\u003c\/li\u003e\n\u003cli\u003e32 L \/ 8.45 gal bottom-load aluminum canister\u003c\/li\u003e\n\u003cli\u003eHybrid cyclonic filtration with or without a disposable bag\u003c\/li\u003e\n\u003cli\u003e15-year residential parts warranty with 1 year of labor\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe Nadair SD-659-32SF is a central vacuum power unit designed for an installed whole-house vacuum network. Its 6.6-inch, two-stage Ametek Lamb by-pass motor delivers 659 airwatts, 144.9 inches of water lift, and 135.8 CFM of airflow for cleaning through compatible central vacuum piping.\u003c\/p\u003e\n\u003cp\u003eThis model uses a hybrid filtration system, so it can operate with a disposable bag or in bagless mode. The included triple-layer bag helps contain collected debris, while the included True HEPA self-cleaning polypropylene filter remains installed during operation and filters up to 99.99% according to the supplied product information.\u003c\/p\u003e\n\u003cp\u003eThe 32 L bottom-load canister provides more capacity than the 22 L version in the same Super Duty family. The polished aluminum canister is described as lightweight, rustproof, and smooth, while dual noise isolation combines noise-isolating foam with an external or integrated muffler for quieter operation.\u003c\/p\u003e\n\u003cp\u003eSoft-start and stop technology is intended to extend motor life by 20%, and the three-second stop delay helps clear the hose and piping after the system is switched off. An LED indicator displays unit status and provides a reminder to empty the canister.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eExpert Recommendation\u003c\/h2\u003e\n\u003cp\u003eThe SD-659-32SF suits homeowners who want a large-capacity central vacuum system with flexible bagged or bagless operation and a self-cleaning True HEPA filter. Its 65 dB rating, bottom-load canister, dual side air intake, and compatibility with standard 2-inch outside-diameter PVC piping make it useful for replacement installations and existing central vacuum networks.\u003c\/p\u003e\n\u003cp\u003eChoose the SD-659-32SF over the SD-659-22SF when the larger 32 L capacity is more useful than the smaller 22 L canister. The smaller model has the same listed motor performance, filtration rating, airflow, water lift, and noise level, but the 22 L unit may be easier to accommodate where installation space is limited.\u003c\/p\u003e\n\u003cp\u003eA sibling model may be a better fit when a different priority comes first. The HD-750-32H provides 750 airwatts, 146 inches of water lift, and 141.2 CFM at the same listed 65 dB noise level, while the SD-750SM-32SF adds app and voice start-stop, three speeds, and live status.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eBest For\u003c\/h2\u003e\n\u003ch3\u003eLarge-Capacity Cleaning\u003c\/h3\u003e\n\u003cp\u003eThe 32 L \/ 8.45 gal bottom-load canister provides more debris capacity than the 22 L Super Duty model, which can reduce how often the canister needs attention.\u003c\/p\u003e\n\u003ch3\u003eHybrid Filtration\u003c\/h3\u003e\n\u003cp\u003eThis unit can be used with or without a disposable bag and includes both a triple-layer bag and a True HEPA self-cleaning filter.\u003c\/p\u003e\n\u003ch3\u003eAllergy-Conscious Households\u003c\/h3\u003e\n\u003cp\u003eThe included True HEPA self-cleaning polypropylene filter is designed to filter up to 99.99%, and the filter must remain installed even when the unit is used with a bag.\u003c\/p\u003e\n\u003ch3\u003eQuieter Utility Areas\u003c\/h3\u003e\n\u003cp\u003eThe motor is listed at 65 dB and uses double noise isolation with noise-isolating foam and an included muffler.\u003c\/p\u003e\n\u003ch3\u003eReplacement Installations\u003c\/h3\u003e\n\u003cp\u003eDual side air intakes and compatibility with standard 2-inch outside-diameter PVC piping can simplify connection to an existing central vacuum piping network.\u003c\/p\u003e\n\u003ch3\u003eFrequent Whole-House Cleaning\u003c\/h3\u003e\n\u003cp\u003eThe two-stage semi-commercial-grade motor provides 659 airwatts, 144.9 inches of water lift, and 135.8 CFM for a central vacuum system with substantial listed suction performance.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eNot Ideal For\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eIt is not a complete cleaning kit. The hose and attachment kit are sold separately and must match the home's inlet type, such as low-voltage or electric.\u003c\/li\u003e\n\u003cli\u003eThe unit requires a dedicated individual 15 A branch circuit according to the owner manual, so electrical planning is part of installation.\u003c\/li\u003e\n\u003cli\u003eThe True HEPA filter must not be washed, and the manual calls for cleaning or replacement after the canister is emptied or after every three bags, with yearly replacement to maintain the warranty.\u003c\/li\u003e\n\u003cli\u003eThe 32 L canister has greater capacity than the 22 L version but may require more installation space; the unit measures 13.25 inches deep by 37.26 inches high by 17.25 inches wide.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e659 Airwatts:\u003c\/strong\u003e The two-stage Ametek Lamb by-pass motor produces 659 airwatts for central vacuum cleaning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStrong Airflow:\u003c\/strong\u003e The system is listed at 144.9 inches of water lift and 135.8 CFM of airflow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHybrid Filtration:\u003c\/strong\u003e Operate with or without a disposable bag while keeping the True HEPA self-cleaning filter installed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e32 L Canister:\u003c\/strong\u003e The 32 L \/ 8.45 gal bottom-load canister provides substantial debris capacity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAluminum Construction:\u003c\/strong\u003e The canister is made from lightweight, rustproof aluminum with a smooth, polished finish.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNoise Isolation:\u003c\/strong\u003e Noise-isolating foam and an included muffler support the listed 65 dB noise level.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoft Start and Stop:\u003c\/strong\u003e Soft-start and stop technology is intended to extend motor life by 20%, with a three-second delay to help clear the piping.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLED Indicator:\u003c\/strong\u003e The LED displays unit status and reminds you when the canister should be emptied.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Air Intakes:\u003c\/strong\u003e Dual side air intakes support installation on an existing central vacuum piping network.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eWhat Makes This Model Stand Out\u003c\/h2\u003e\n\u003cp\u003eThe SD-659-32SF combines a high-capacity 32 L canister with flexible hybrid filtration. You can use the included FD-45L-3NAD disposable bag or operate bagless with the included FILP-SF True HEPA self-cleaning filter, while the filter remains installed in either configuration.\u003c\/p\u003e\n\u003cp\u003eIts feature set is oriented toward long-term installed use rather than portable cleaning. The aluminum bottom-load canister, soft-start and stop technology, LED status indicator, dual side air intake, noise isolation, and 15-year residential parts warranty all support a central vacuum power unit intended to stay connected to the home's piping.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eProduct Comparisons\u003c\/h2\u003e\n\u003ch3\u003eSD-659-32SF vs SD-659-22SF\u003c\/h3\u003e\n\u003cp\u003eBoth models are listed with 659 airwatts, 144.9 inches of water lift, 135.8 CFM, 65 dB noise, hybrid cyclonic filtration up to 99.99%, soft-start and stop technology, and the Super Duty self-cleaning filter system. The SD-659-32SF has a 32 L \/ 8.45 gal canister, while the SD-659-22SF has a 22 L \/ 5.8 gal canister.\u003c\/p\u003e\n\u003ch3\u003eSD-659-32SF vs HD-750-32H\u003c\/h3\u003e\n\u003cp\u003eBoth units have 32 L \/ 8.45 gal capacity and a listed 65 dB noise level. The HD-750-32H lists 750 airwatts, 146 inches of water lift, and 141.2 CFM, while the SD-659-32SF lists 659 airwatts, 144.9 inches of water lift, and 135.8 CFM; the SD model lists up to 99.99% filtration and self-cleaning True HEPA filtration.\u003c\/p\u003e\n\u003ch3\u003eCentral Vacuum vs Portable Vacuum\u003c\/h3\u003e\n\u003cp\u003eA central vacuum power unit stays in a garage, basement, or other suitable utility location, so you do not carry the main machine from room to room. The system can also be configured with exhaust venting outdoors, subject to proper installation, while the hose and cleaning tools connect at the home's inlets.\u003c\/p\u003e\n\u003ch3\u003eBagged vs Hybrid Operation\u003c\/h3\u003e\n\u003cp\u003eBagged operation uses the included triple-layer disposable bag and can make collected debris easier to remove. Hybrid operation allows bagless use with the True HEPA self-cleaning filter, but the filter must stay installed and must not be washed.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eQuestions Buyers Commonly Ask\u003c\/h2\u003e\n\u003ch3\u003eCan this unit connect to my existing central vacuum piping?\u003c\/h3\u003e\n\u003cp\u003eIt is designed to fit existing standard 2-inch outside-diameter PVC piping meeting ASTM F2158. Ace Vacuums can help verify the piping and inlet arrangement before purchase.\u003c\/p\u003e\n\u003ch3\u003eCan I use the SD-659-32SF without a disposable bag?\u003c\/h3\u003e\n\u003cp\u003eYes. The hybrid system supports bagged or bagless operation, but the True HEPA self-cleaning filter must be installed at all times, including when a bag is used.\u003c\/p\u003e\n\u003ch3\u003eDoes the package include a hose and cleaning tools?\u003c\/h3\u003e\n\u003cp\u003eNo hose or attachment kit is listed as included. The hose and tools are sold separately and must match the home's inlets, including whether the system uses low-voltage or electric hose controls.\u003c\/p\u003e\n\u003ch3\u003eHow often should I empty the canister or replace the bag?\u003c\/h3\u003e\n\u003cp\u003eThe manual advises emptying the canister or replacing the bag two or three times per year. Actual timing depends on use and how much debris the system collects.\u003c\/p\u003e\n\u003ch3\u003eHow should I care for the True HEPA filter?\u003c\/h3\u003e\n\u003cp\u003eClean or replace the filter whenever the canister is emptied or after every three bags. Do not wash the True HEPA filter, and replace it every year to maintain the warranty.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eNadair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eSD-659-32SF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eSuper Duty Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor\u003c\/td\u003e\n\u003ctd\u003e6.6-inch, two-stage Ametek Lamb by-pass, semi-commercial grade motor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAirwatts\u003c\/td\u003e\n\u003ctd\u003e659\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater Lift\u003c\/td\u003e\n\u003ctd\u003e144.9 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAirflow\u003c\/td\u003e\n\u003ctd\u003e135.8 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNoise Level\u003c\/td\u003e\n\u003ctd\u003e65 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCanister Capacity\u003c\/td\u003e\n\u003ctd\u003e32 L \/ 8.45 gal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCanister Material\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCanister Loading\u003c\/td\u003e\n\u003ctd\u003eBottom load\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFiltration\u003c\/td\u003e\n\u003ctd\u003eCyclonic self-cleaning hybrid filtration; usable with or without a bag; filters up to 99.99%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReplacement Bag\u003c\/td\u003e\n\u003ctd\u003eFD-45L-3NAD bag\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReplacement Filter\u003c\/td\u003e\n\u003ctd\u003eFILP-SF True HEPA self-cleaning filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir Intake\u003c\/td\u003e\n\u003ctd\u003eDual side air intake\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectrical\u003c\/td\u003e\n\u003ctd\u003eDedicated individual 15 A branch circuit; 110-120 VAC, 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Cord\u003c\/td\u003e\n\u003ctd\u003e72-inch grounded cord\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e13.25 inches deep x 37.26 inches high x 17.25 inches wide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003ctd\u003eOne triple-layer disposable filtration bag and one True HEPA self-cleaning filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e15 years parts on the motor, body, housing, electronic module, and dust bin while owned, plus 1 year of labor; residential use only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePiping Compatibility\u003c\/td\u003e\n\u003ctd\u003eStandard 2-inch outside-diameter PVC piping meeting ASTM F2158\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAuthorized Dealer\u003c\/td\u003e\n\u003ctd\u003eAce Vacuums\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eInstall the power unit in a well-ventilated, weather-protected indoor location with at least 6 inches of clearance on all sides.\u003c\/li\u003e\n\u003cli\u003eDo not install the unit outdoors. Exhaust venting outdoors is recommended when the installation allows it.\u003c\/li\u003e\n\u003cli\u003eConnect the unit to a dedicated individual 15 A branch circuit at 110-120 VAC and 60 Hz. Do not use an extension cord or adapter.\u003c\/li\u003e\n\u003cli\u003eThe manual requires a 72-inch grounded power cord and recommends installation documentation, including an invoice for installation by a qualified electrician, for warranty purposes.\u003c\/li\u003e\n\u003cli\u003eThe unit is designed for standard 2-inch outside-diameter PVC piping meeting ASTM F2158. Low-voltage wire is needed for a hose on-off switch.\u003c\/li\u003e\n\u003cli\u003eConfirm that the separate hose and attachment kit matches the home's inlet configuration before installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eMaintenance Tips\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eEmpty the canister or replace the disposable bag two or three times per year, or sooner if the LED indicator and collected debris indicate that service is needed.\u003c\/li\u003e\n\u003cli\u003eKeep the True HEPA self-cleaning filter installed during both bagged and bagless operation.\u003c\/li\u003e\n\u003cli\u003eClean or replace the True HEPA filter every time the canister is emptied or after every three bags. Do not wash this filter.\u003c\/li\u003e\n\u003cli\u003eReplace the True HEPA filter once a year to keep the warranty requirements satisfied.\u003c\/li\u003e\n\u003cli\u003eUse FD-45L-3NAD replacement bags for this 32 L model.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eIdeal Buyers\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePerfect for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHomeowners replacing or upgrading an existing central vacuum power unit\u003c\/li\u003e\n\u003cli\u003eHouseholds that want the choice of disposable-bag or bagless operation\u003c\/li\u003e\n\u003cli\u003eUsers who prefer a larger 32 L canister over the 22 L Super Duty version\u003c\/li\u003e\n\u003cli\u003eAllergy-conscious households that want the included True HEPA self-cleaning filter\u003c\/li\u003e\n\u003cli\u003eHomeowners with compatible standard 2-inch outside-diameter PVC piping\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eWhy Buy from Ace Vacuums\u003c\/h2\u003e\n\u003cp\u003eWhen you purchase from \u003cstrong\u003eAuthorized Nadair Dealer Ace Vacuums\u003c\/strong\u003e, you receive:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Nadair central vacuum power units\u003c\/li\u003e\n\u003cli\u003eExpert help sizing the right unit for your home and piping\u003c\/li\u003e\n\u003cli\u003eGuidance on matching hoses and attachment kits to your inlets\u003c\/li\u003e\n\u003cli\u003eGenuine Nadair replacement bags and filters\u003c\/li\u003e\n\u003cli\u003eKnowledgeable customer support before and after the sale\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eAvailable Online \u0026amp; In-Store\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eNadair SD-659-32SF\u003c\/strong\u003e is available online and in-store through \u003cstrong\u003eAuthorized Nadair Dealer Ace Vacuums\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eVisit Our Showrooms\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFairfax, VA:\u003c\/strong\u003e 11110 Main St, Fairfax, VA 22030\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLeesburg, VA:\u003c\/strong\u003e 300 Fort Evans Rd NE, Leesburg, VA 20176\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCall 703-997-9292 (ext. 1 Fairfax, ext. 2 Leesburg). Both stores are open 7 days a week to compare central vacuum systems and talk with our specialists.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eComparison Table\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eNadair SD-659-32SF\u003c\/th\u003e\n\u003cth\u003eNadair HD-750-32H\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAirwatts\u003c\/td\u003e\n\u003ctd\u003e659\u003c\/td\u003e\n\u003ctd\u003e750\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater lift\u003c\/td\u003e\n\u003ctd\u003e144.9 inches\u003c\/td\u003e\n\u003ctd\u003e146 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAirflow\u003c\/td\u003e\n\u003ctd\u003e135.8 CFM\u003c\/td\u003e\n\u003ctd\u003e141.2 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNoise level\u003c\/td\u003e\n\u003ctd\u003e65 dB\u003c\/td\u003e\n\u003ctd\u003e65 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCanister capacity\u003c\/td\u003e\n\u003ctd\u003e32 L \/ 8.45 gal\u003c\/td\u003e\n\u003ctd\u003e32 L \/ 8.45 gal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFiltration\u003c\/td\u003e\n\u003ctd\u003eHybrid cyclonic, with or without bag, up to 99.99%\u003c\/td\u003e\n\u003ctd\u003eHybrid cyclonic, with or without bag, up to 99.97%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSoft start and stop\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eSuper Duty Series\u003c\/td\u003e\n\u003ctd\u003eHeavy Duty Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch2\u003ePros and Cons\u003c\/h2\u003e\n\u003ch3\u003ePros\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e659 airwatts, 144.9 inches of water lift, and 135.8 CFM of listed performance\u003c\/li\u003e\n\u003cli\u003eLarge 32 L \/ 8.45 gal bottom-load canister\u003c\/li\u003e\n\u003cli\u003eHybrid bagged or bagless operation\u003c\/li\u003e\n\u003cli\u003eIncluded True HEPA self-cleaning filter with filtration up to 99.99%\u003c\/li\u003e\n\u003cli\u003eSoft-start and stop technology, LED status indicator, and three-second delay\u003c\/li\u003e\n\u003cli\u003e15-year residential parts warranty plus 1 year of labor\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCons\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe hose and cleaning tools are sold separately.\u003c\/li\u003e\n\u003cli\u003eInstallation requires a dedicated individual 15 A branch circuit according to the manual.\u003c\/li\u003e\n\u003cli\u003eThe True HEPA filter must not be washed and requires regular care and yearly replacement.\u003c\/li\u003e\n\u003cli\u003eThe larger 32 L canister requires suitable installation space.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is the Nadair SD-659-32SF?\u003c\/h3\u003e\n\u003cp\u003eIt is a Super Duty central vacuum power unit with a 659-airwatt, two-stage Ametek Lamb by-pass motor. It connects to installed central vacuum piping and uses a 32 L bottom-load canister.\u003c\/p\u003e\n\u003ch3\u003eHow powerful is this central vacuum system?\u003c\/h3\u003e\n\u003cp\u003eThe listed performance is 659 airwatts, 144.9 inches of water lift, and 135.8 CFM of airflow. These figures describe the power unit's stated suction and airflow specifications.\u003c\/p\u003e\n\u003ch3\u003eIs this a bagged or bagless central vacuum?\u003c\/h3\u003e\n\u003cp\u003eIt is a hybrid system. You can use the FD-45L-3NAD disposable bag or operate without a bag using the included True HEPA self-cleaning filter.\u003c\/p\u003e\n\u003ch3\u003eMust the filter stay installed when using a bag?\u003c\/h3\u003e\n\u003cp\u003eYes. The True HEPA self-cleaning polypropylene filter must be installed at all times, including during bagged operation.\u003c\/p\u003e\n\u003ch3\u003eCan I wash the True HEPA filter?\u003c\/h3\u003e\n\u003cp\u003eNo. The manual specifically says not to wash the True HEPA filter because washing may clog it and void the warranty.\u003c\/p\u003e\n\u003ch3\u003eHow often should the filter be replaced?\u003c\/h3\u003e\n\u003cp\u003eThe manual calls for cleaning or replacement whenever the canister is emptied or after every three bags. It also calls for yearly replacement to maintain the warranty.\u003c\/p\u003e\n\u003ch3\u003eWhat replacement bag fits this model?\u003c\/h3\u003e\n\u003cp\u003eThe 32 L SD-659-32SF uses the FD-45L-3NAD bag. The listed replacement pack contains three bags.\u003c\/p\u003e\n\u003ch3\u003eWill it fit standard central vacuum piping?\u003c\/h3\u003e\n\u003cp\u003eThe unit is designed for standard 2-inch outside-diameter PVC piping meeting ASTM F2158. Existing piping and connections should still be checked before installation.\u003c\/p\u003e\n\u003ch3\u003eDoes the unit include a hose?\u003c\/h3\u003e\n\u003cp\u003eNo hose is listed as included. A compatible hose and attachment kit must be purchased separately and matched to the home's low-voltage or electric inlet configuration.\u003c\/p\u003e\n\u003ch3\u003eHow noisy is the SD-659-32SF?\u003c\/h3\u003e\n\u003cp\u003eThe listed noise level is 65 dB. Noise-isolating foam and a muffler are included as part of the double noise-isolation system.\u003c\/p\u003e\n\u003ch3\u003eWhat electrical circuit does it need?\u003c\/h3\u003e\n\u003cp\u003eThe Super Duty owner manual requires a dedicated individual 15 A branch circuit at 110-120 VAC and 60 Hz. Do not use an extension cord or adapter.\u003c\/p\u003e\n\u003ch3\u003eCan it be installed outdoors?\u003c\/h3\u003e\n\u003cp\u003eNo. The manual calls for a well-ventilated, weather-protected location and says not to install the unit outdoors. Exhaust venting outdoors is recommended when practical.\u003c\/p\u003e\n\u003ch3\u003eHow much clearance is needed?\u003c\/h3\u003e\n\u003cp\u003eThe manual specifies 6 inches of clearance all around the unit. The listed dimensions are 13.25 inches deep, 37.26 inches high, and 17.25 inches wide.\u003c\/p\u003e\n\u003ch3\u003eHow often should the canister be emptied?\u003c\/h3\u003e\n\u003cp\u003eThe manual advises emptying the canister or replacing the bag two or three times per year. Heavy use may require more frequent attention.\u003c\/p\u003e\n\u003ch3\u003eWhat does soft-start and stop do?\u003c\/h3\u003e\n\u003cp\u003eThe feature is designed to extend motor life by 20%. The system also has a three-second stop delay intended to help clear the hose and piping.\u003c\/p\u003e\n\u003ch3\u003eWhat does the warranty cover?\u003c\/h3\u003e\n\u003cp\u003eThe warranty provides 15 years of parts coverage on the motor, body, housing, electronic module, and dust bin while you own the unit, plus 1 year of labor. It is for residential use only and requires proof of purchase and an invoice for installation by a qualified electrician.\u003c\/p\u003e\n\u003ch3\u003eCan Ace Vacuums help determine whether this model fits my home?\u003c\/h3\u003e\n\u003cp\u003eYes. Ace Vacuums can help review the home's existing piping, inlet type, hose requirements, and installation conditions. Coverage should be sized for the home and piping run rather than estimated from a general square-foot claim.\u003c\/p\u003e\n","brand":"Nadair","offers":[{"title":"Default Title","offer_id":53384860008629,"sku":"SD-659-32SF","price":929.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0575\/6751\/0709\/files\/SD-659-32SF-1-scaled.jpg?v=1790447765","url":"https:\/\/acevacuums.com\/products\/nadair-sd-659-32sf-super-duty-hepa-central-vacuum-power-unit-659-aw-32l","provider":"Ace Vacuums","version":"1.0","type":"link"}