The Nadair ST-600-18B is a compact central vacuum power unit for homeowners who want a whole-house vacuum connected to existing central vacuum piping. Its 600 airwatts, 140.9 inches of water lift, and 127.1 CFM provide strong suction and airflow, while the 18 L canister and narrow footprint suit installations where space is limited.
Authorized Nadair Dealer Ace Vacuums can help you evaluate the piping run, inlet setup, and accessory compatibility before purchasing. This model uses a disposable triple-layer filtration bag together with a permanent protective filter, so it is a bag-only system rather than a bagless or hybrid unit.
The ST-600-18B is designed as a compact central vacuum system for homes that already have, or are being fitted with, standard central vacuum piping. Its side air intake helps simplify connection to an existing piping network, and the rolled steel canister is designed to resist wear, corrosion, and damage.
Inside, a 600-airwatt 1-stage Ametek thru-flow motor produces 140.9 inches of water lift and 127.1 CFM. Those specifications describe both the unit's suction strength and its ability to move air through the central vacuum piping and hose system. Ace Vacuums can help size the unit for the home and piping run rather than relying on a square-foot coverage claim.
The ST-600-18B must be operated with a disposable bag and its permanent protective filter installed at all times. One triple-layer disposable bag and one permanent protective filter are included. This arrangement keeps collected debris in the bag and protects the motor, but it also means the unit is not intended for bagless operation.
A 62 dB rating, noise-isolating foam, and an integrated muffler help reduce operating sound. The top-load 18 L canister is removable for service, and the compact dimensions are 11.42 inches deep by 19.48 inches high by 11.42 inches wide.
This model suits homeowners who want a compact central vacuum power unit with straightforward bagged filtration. It is a practical fit for a narrow utility area, an existing standard piping network, or a household that prefers replacing a contained disposable bag instead of handling debris from a bagless canister.
The main tradeoff is the required bag-and-filter arrangement. If you want a larger canister or the option to operate with or without a bag, the Nadair ST-700-25H offers 700 airwatts, 141.2 inches of water lift, 140.2 CFM, and a 25 L canister with hybrid cyclonic filtration. If you need more capacity while keeping the same 700-airwatt specifications, the ST-700-35H has a 35 L canister.
The ST-600-18B is not a complete cleaning kit. The hose and attachment kit are sold separately and must match the home's inlets, including whether the installation uses low-voltage or electric hose control.
Its compact 11.42-inch by 11.42-inch footprint and 19.48-inch height make it appropriate when the installation area is narrow, subject to the required clearance around the unit.
The disposable triple-layer bag contains collected debris and is required along with the permanent protective filter, making the operating method clear and contained.
The side air intake is designed for easy connection to an existing piping network, and the unit fits standard 2-inch outside-diameter PVC piping.
The unit is rated at 62 dB and uses noise-isolating foam plus an integrated muffler to reduce operating sound.
The ST-600-18B includes a 10-year residential warranty on specified parts, with 1 year of labor, when maintained according to the warranty requirements.
The ST-600-18B combines a compact enclosure with 600 airwatts, 140.9 inches of water lift, and 127.1 CFM. That makes it a focused choice for homeowners who want a strong central vacuum power unit without moving to the larger canister sizes of other Nadair models.
Its filtration instructions are especially important: the disposable bag and FILP-SF-1 permanent protective filter are both required at all times. The filter is washable with cold water, but it must be replaced yearly to maintain the warranty, so buyers should plan for both bag replacement and filter care.
The ST-600-18B has 600 airwatts, 140.9 inches of water lift, 127.1 CFM, a 62 dB rating, and an 18 L canister. The ST-700-25H increases output to 700 airwatts, 141.2 inches of water lift, and 140.2 CFM, has a 25 L canister, and uses hybrid cyclonic filtration that can operate with or without a bag.
Both are in the compact ST Series, but the ST-700-35H provides a 35 L / 9.25 gal canister compared with the ST-600-18B's 18 L / 4.75 gal capacity. The ST-700-35H also has 700 airwatts, 141.2 inches of water lift, and 140.2 CFM, while the ST-600-18B is the smaller bag-only option.
A central vacuum power unit remains installed in a garage, basement, or other suitable utility location, so the homeowner does not carry the main machine from room to room. The exhaust can be vented outside when the installation allows, and cleaning is performed through a separately purchased hose and tool kit.
The ST-600-18B is bag-only: its disposable bag and permanent protective filter must always be installed. A hybrid Nadair model such as the ST-700-25H can be used with or without a bag and uses hybrid cyclonic filtration, giving shoppers a different maintenance preference.
The side air intake is designed for an existing piping network, and Nadair lists compatibility with standard 2-inch outside-diameter PVC piping. Have Ace Vacuums review the piping and inlet arrangement before installation.
No. This model must be used with a disposable bag and the FILP-SF-1 permanent protective filter at all times. It is not a bagless or hybrid-operating unit.
No hose or attachment kit is listed as included. The hose and tools are sold separately and must match the home's inlets and control type.
The stated noise level is 62 dB. Noise-isolating foam and an integrated muffler are included to support noise reduction.
Nadair's manual recommends replacing the bag or emptying the canister three or four times per year. Wash the permanent filter with cold water whenever the canister is emptied, and replace the filter annually to maintain the warranty.
| Specification | Details |
|---|---|
| Brand | Nadair |
| Model | ST-600-18B |
| Series | ST Series (Compact) |
| Motor | 5.7-inch 1-stage Ametek thru-flow motor |
| Airwatts | 600 |
| Water Lift | 140.9 inches |
| Airflow | 127.1 CFM |
| Noise Level | 62 dB |
| Canister Capacity | 18 L / 4.75 gal |
| Canister Material | Rolled steel |
| Canister Loading | Top load |
| Filtration | Bag only; disposable bag and permanent protective filter required |
| Replacement Bag | Nadair disposable triple-layer bag required; ask Ace Vacuums for the matching bag |
| Replacement Filter | FILP-SF-1 permanent protective filter |
| Air Intake | Side |
| Electrical | 110-120 VAC, 60 Hz; standard 15 A breaker; a dedicated circuit is recommended but not required |
| Power Cord | 72-inch grounded power cord |
| Dimensions | 11.42 inches deep x 19.48 inches high x 11.42 inches wide |
| Included | One triple-layer disposable filtration bag and one permanent protective filter |
| Warranty | 10 years on specified parts, with 1 year of labor; residential use only |
| Piping Compatibility | Standard 2-inch outside-diameter PVC piping, ASTM F2158 |
| Authorized Dealer | Ace Vacuums |
Perfect for:
When you purchase from Authorized Nadair Dealer Ace Vacuums, you receive:
The Nadair ST-600-18B is available online and in-store through Authorized Nadair Dealer Ace Vacuums.
Call 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.
| Feature | Nadair ST-600-18B | Nadair ST-700-25H |
|---|---|---|
| Series | ST Series (Compact) | ST Series (Compact) |
| Airwatts | 600 | 700 |
| Water lift | 140.9 inches | 141.2 inches |
| Airflow | 127.1 CFM | 140.2 CFM |
| Noise level | 62 dB | 63 dB |
| Canister | 18 L / 4.75 gal | 25 L / 6.6 gal |
| Filtration | Bag only; bag and permanent protective filter required | Hybrid cyclonic; with or without bag; up to 99.97% |
| Operating choice | Disposable bag required | Can operate with or without a bag |
| Motor output | 5.7-inch 1-stage Ametek thru-flow motor | 700 airwatts |
The Nadair ST-600-18B is a compact central vacuum power unit for homeowners who want a whole-house vacuum connected to existing central vacuum piping. Its 600 airwatts, 140.9 inches of water lift, and 127.1 CFM provide strong suction and airflow, while the 18 L canister and narrow footprint suit installations where space is limited.
Authorized Nadair Dealer Ace Vacuums can help you evaluate the piping run, inlet setup, and accessory compatibility before purchasing. This model uses a disposable triple-layer filtration bag together with a permanent protective filter, so it is a bag-only system rather than a bagless or hybrid unit.
The ST-600-18B is designed as a compact central vacuum system for homes that already have, or are being fitted with, standard central vacuum piping. Its side air intake helps simplify connection to an existing piping network, and the rolled steel canister is designed to resist wear, corrosion, and damage.
Inside, a 600-airwatt 1-stage Ametek thru-flow motor produces 140.9 inches of water lift and 127.1 CFM. Those specifications describe both the unit's suction strength and its ability to move air through the central vacuum piping and hose system. Ace Vacuums can help size the unit for the home and piping run rather than relying on a square-foot coverage claim.
The ST-600-18B must be operated with a disposable bag and its permanent protective filter installed at all times. One triple-layer disposable bag and one permanent protective filter are included. This arrangement keeps collected debris in the bag and protects the motor, but it also means the unit is not intended for bagless operation.
A 62 dB rating, noise-isolating foam, and an integrated muffler help reduce operating sound. The top-load 18 L canister is removable for service, and the compact dimensions are 11.42 inches deep by 19.48 inches high by 11.42 inches wide.
This model suits homeowners who want a compact central vacuum power unit with straightforward bagged filtration. It is a practical fit for a narrow utility area, an existing standard piping network, or a household that prefers replacing a contained disposable bag instead of handling debris from a bagless canister.
The main tradeoff is the required bag-and-filter arrangement. If you want a larger canister or the option to operate with or without a bag, the Nadair ST-700-25H offers 700 airwatts, 141.2 inches of water lift, 140.2 CFM, and a 25 L canister with hybrid cyclonic filtration. If you need more capacity while keeping the same 700-airwatt specifications, the ST-700-35H has a 35 L canister.
The ST-600-18B is not a complete cleaning kit. The hose and attachment kit are sold separately and must match the home's inlets, including whether the installation uses low-voltage or electric hose control.
Its compact 11.42-inch by 11.42-inch footprint and 19.48-inch height make it appropriate when the installation area is narrow, subject to the required clearance around the unit.
The disposable triple-layer bag contains collected debris and is required along with the permanent protective filter, making the operating method clear and contained.
The side air intake is designed for easy connection to an existing piping network, and the unit fits standard 2-inch outside-diameter PVC piping.
The unit is rated at 62 dB and uses noise-isolating foam plus an integrated muffler to reduce operating sound.
The ST-600-18B includes a 10-year residential warranty on specified parts, with 1 year of labor, when maintained according to the warranty requirements.
The ST-600-18B combines a compact enclosure with 600 airwatts, 140.9 inches of water lift, and 127.1 CFM. That makes it a focused choice for homeowners who want a strong central vacuum power unit without moving to the larger canister sizes of other Nadair models.
Its filtration instructions are especially important: the disposable bag and FILP-SF-1 permanent protective filter are both required at all times. The filter is washable with cold water, but it must be replaced yearly to maintain the warranty, so buyers should plan for both bag replacement and filter care.
The ST-600-18B has 600 airwatts, 140.9 inches of water lift, 127.1 CFM, a 62 dB rating, and an 18 L canister. The ST-700-25H increases output to 700 airwatts, 141.2 inches of water lift, and 140.2 CFM, has a 25 L canister, and uses hybrid cyclonic filtration that can operate with or without a bag.
Both are in the compact ST Series, but the ST-700-35H provides a 35 L / 9.25 gal canister compared with the ST-600-18B's 18 L / 4.75 gal capacity. The ST-700-35H also has 700 airwatts, 141.2 inches of water lift, and 140.2 CFM, while the ST-600-18B is the smaller bag-only option.
A central vacuum power unit remains installed in a garage, basement, or other suitable utility location, so the homeowner does not carry the main machine from room to room. The exhaust can be vented outside when the installation allows, and cleaning is performed through a separately purchased hose and tool kit.
The ST-600-18B is bag-only: its disposable bag and permanent protective filter must always be installed. A hybrid Nadair model such as the ST-700-25H can be used with or without a bag and uses hybrid cyclonic filtration, giving shoppers a different maintenance preference.
The side air intake is designed for an existing piping network, and Nadair lists compatibility with standard 2-inch outside-diameter PVC piping. Have Ace Vacuums review the piping and inlet arrangement before installation.
No. This model must be used with a disposable bag and the FILP-SF-1 permanent protective filter at all times. It is not a bagless or hybrid-operating unit.
No hose or attachment kit is listed as included. The hose and tools are sold separately and must match the home's inlets and control type.
The stated noise level is 62 dB. Noise-isolating foam and an integrated muffler are included to support noise reduction.
Nadair's manual recommends replacing the bag or emptying the canister three or four times per year. Wash the permanent filter with cold water whenever the canister is emptied, and replace the filter annually to maintain the warranty.
| Specification | Details |
|---|---|
| Brand | Nadair |
| Model | ST-600-18B |
| Series | ST Series (Compact) |
| Motor | 5.7-inch 1-stage Ametek thru-flow motor |
| Airwatts | 600 |
| Water Lift | 140.9 inches |
| Airflow | 127.1 CFM |
| Noise Level | 62 dB |
| Canister Capacity | 18 L / 4.75 gal |
| Canister Material | Rolled steel |
| Canister Loading | Top load |
| Filtration | Bag only; disposable bag and permanent protective filter required |
| Replacement Bag | Nadair disposable triple-layer bag required; ask Ace Vacuums for the matching bag |
| Replacement Filter | FILP-SF-1 permanent protective filter |
| Air Intake | Side |
| Electrical | 110-120 VAC, 60 Hz; standard 15 A breaker; a dedicated circuit is recommended but not required |
| Power Cord | 72-inch grounded power cord |
| Dimensions | 11.42 inches deep x 19.48 inches high x 11.42 inches wide |
| Included | One triple-layer disposable filtration bag and one permanent protective filter |
| Warranty | 10 years on specified parts, with 1 year of labor; residential use only |
| Piping Compatibility | Standard 2-inch outside-diameter PVC piping, ASTM F2158 |
| Authorized Dealer | Ace Vacuums |
Perfect for:
When you purchase from Authorized Nadair Dealer Ace Vacuums, you receive:
The Nadair ST-600-18B is available online and in-store through Authorized Nadair Dealer Ace Vacuums.
Call 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.
| Feature | Nadair ST-600-18B | Nadair ST-700-25H |
|---|---|---|
| Series | ST Series (Compact) | ST Series (Compact) |
| Airwatts | 600 | 700 |
| Water lift | 140.9 inches | 141.2 inches |
| Airflow | 127.1 CFM | 140.2 CFM |
| Noise level | 62 dB | 63 dB |
| Canister | 18 L / 4.75 gal | 25 L / 6.6 gal |
| Filtration | Bag only; bag and permanent protective filter required | Hybrid cyclonic; with or without bag; up to 99.97% |
| Operating choice | Disposable bag required | Can operate with or without a bag |
| Motor output | 5.7-inch 1-stage Ametek thru-flow motor | 700 airwatts |
It is a compact central vacuum power unit in Nadair's ST Series. It connects to central vacuum piping and provides 600 airwatts, 140.9 inches of water lift, and 127.1 CFM.
It is a bag-only central vacuum unit. A disposable bag and the permanent protective filter must be installed at all times.
It uses the FILP-SF-1 permanent protective filter along with a disposable triple-layer filtration bag. One protective filter and one bag are included.
Yes. Nadair specifies washing the permanent filter with cold water whenever the canister is emptied. The filter should be replaced every year to maintain the warranty.
Nadair's manual recommends replacing the bag three or four times per year. Actual timing depends on use and how quickly the bag fills.
The top-load rolled steel canister holds 18 L, or 4.75 gallons. It is removable for emptying and service.
Nadair lists compatibility with standard 2-inch outside-diameter PVC piping (ASTM F2158). A professional should verify the home's piping and inlet connections before installation.
The side air intake is designed to make connection to an existing piping network easier. The installer should confirm the intake orientation and available space before mounting the unit.
No hose is listed as included. The hose and attachment kit are sold separately and must match the home's inlet and control type.
Low-voltage wire is needed for the hose on-off switch. The hose and accessory setup should be matched to the home's existing low-voltage or electric inlets.
Nadair specifies 110-120 VAC, 60 Hz power on a 15 A circuit. A dedicated circuit is recommended but not required, and extension cords or adapters should not be used.
The unit has a 72-inch grounded power cord. The installation should provide a suitable nearby outlet without relying on an extension cord.
The stated noise level is 62 dB. Noise-isolating foam and an integrated muffler are used to reduce operating noise.
Install it indoors in a well-ventilated, weather-protected location away from heat. It should not be installed outdoors and requires at least 6 inches of clearance around all sides.
Outdoor venting is recommended when the installation allows it. Exhaust should not point at a wall or ceiling or discharge into a closed space.
The warranty is 10 years on the motor, electronic module, body, housing, and dust canister while you own the unit, with 1 year of labor. The warranty is for residential use and requires the specified filter maintenance.
The ST-700-25H has 700 airwatts, 140.2 CFM, and a 25 L canister, compared with 600 airwatts, 127.1 CFM, and 18 L for the ST-600-18B. The ST-700-25H also offers hybrid cyclonic filtration with or without a bag, while the ST-600-18B requires a bag.
Check real-time traffic and travel time from your location in VA, DC, or MD.
Address: 11110 Main St, Fairfax, VA 22030
Landmark: Opposite Havertys Furniture Store
Best for: Bethesda, Potomac, Arlington, NW Washington D.C.
Address: 300 Fort Evans Rd NE, Suite 104, Leesburg, VA 20176
Landmark: Next to Home Depot in Leesburg
Best for: Ashburn, Sterling, Frederick MD, Loudoun County
In-stock merchandise generally ships from our Leesburg, Virginia location within 3–5 business days. Processing time is separate from carrier transit time and is not a guaranteed delivery date. Weekends and holidays can affect timing. Special-order, backordered or unavailable items may take longer; contact us to confirm timing before purchase when a deadline matters.
Shipping options and charges are shown at checkout. After dispatch, follow the carrier's tracking updates. Weather, carrier delays, order verification and inventory confirmation may affect delivery. Inspect packages promptly and retain packaging if there is damage or an incorrect or missing item.
Eligible unused items have a 30-calendar-day return request window for refunds or exchanges, measured from delivery or in-store purchase. Return authorization is required. Final-sale exclusions, the 15% restocking fee for change-of-mind returns and shipping responsibilities are explained in our Return and Refund Policy. That policy is the governing source for return eligibility and fees.
For shipping or return help, email sales@acevacuums.com or call 703-997-9292.
Updated September 27, 2026. Request a return for an eligible unused item within 30 calendar days of delivery (or purchase for items collected in store). Eligible returns may be refunded to the original payment method or exchanged, subject to availability. The same 30-day request window applies to both refunds and exchanges; there is no separate seven-day or 15-day refund deadline.
Items must be unused, clean, complete and in their original packaging with all accessories, manuals and proof of purchase. Contact sales@acevacuums.com or 703-997-9292 before sending anything back. Include your order number, item and reason for return. We will confirm eligibility, charges and return instructions. Unapproved or cash-on-delivery returns are not accepted.
For an approved change-of-mind return, a 15% restocking fee applies to the returned merchandise price. Original shipping charges are not refundable and the customer pays return shipping. These charges do not apply to an approved return caused by our shipping error or a damaged/defective item claim. Contact us first so we can arrange the appropriate remedy and shipping instructions. Do not assume a prepaid label is included.
Air purifiers; discounted, clearance, trade-in, holiday-sale and price-matched purchases; gift cards; custom or special-order products; electrical parts; used or installed items; opened cleaning solutions; and used bags, filters, belts or other consumables are not eligible for change-of-mind returns. Other items clearly marked final sale at purchase are also excluded. An opened box alone does not disqualify an otherwise eligible unused, complete item, but consumables and cleaning solutions must remain unopened.
Inspect your order promptly and contact us as soon as you discover a problem, with your order number and photos where helpful. Keep the packaging. Change-of-mind exclusions and deadlines do not remove applicable defect, warranty, recall or statutory rights. Warranty coverage requires evaluation under the manufacturer's terms; dealer status does not guarantee free repair. Recalled products must follow the manufacturer's recall process.
After we receive and inspect the return, we will notify you of approval or the reason it cannot be accepted. Approved refunds are issued to the original payment method within 10 business days of approval; your bank may take additional time to post them. Contact us if more than 15 business days have passed since approval. Exchanges require authorization and replacement availability; any price difference and applicable charges will be explained before processing.
This policy applies to online and in-store purchases. We will honor more favorable written return terms provided with an earlier purchase. Applicable consumer rights remain unaffected. Where the European Union 14-day cancellation right applies, customers may cancel or return eligible orders within 14 days of receipt, subject to applicable legal exceptions, without giving a reason.
Build your cleaning setup with useful accessories. Compare the hose connection and kit contents before choosing; complete kits are alternative setups.
Hose fit depends on your wall inlet, handle, wand and electrical connection. Round 1¼-inch tools do not fit every proprietary or D-shaped handle. A low-voltage hose controls suction but cannot power a corded electric brush. Pigtail hoses need a nearby electrical outlet; direct-connect hoses need matching powered inlets. Check what a complete kit already includes.
30-foot pigtail hose and SEBO powerhead kit. Requires a matching inlet and a nearby electrical outlet. Check included tools before adding extras.
30-foot TurboCat air-driven cleaning kit. Match the wall inlet; turbine cleaning needs adequate airflow and uses no power cord.
ValuFlex replacement electric hose. Verify inlet, handle, wand and electrical connection; select the correct length and connection setup.
Low-voltage hose for suction tools. Match the wall inlet and select the length. It cannot power a corded electric brush.
Separate 30-foot hose and tools for cars and garages. Confirm that the utility or wall inlet accepts the hose connection.
Air-driven Rugrat mini tool for stairs and upholstery. Requires a matching hose connector and adequate suction; no electrical connection.
12-inch hard-floor brush for round 1¼-inch wands. Not a direct fit for proprietary D-shaped connectors.
6-inch upholstery tool with brush strip for furniture and stairs. Match the round hose-end connector.
Soft dusting brush for furniture and detail cleaning. Match the round hose or wand connection.
Crevice tool for sofa gaps, corners and baseboards. Check the hose-end diameter and shape.
Telescopic friction-fit wand for suction tools. Accepts a round 1⅛–1¼-inch hose end; no integrated electrical connection.
Padded zippered cover for a conventional hose. Choose the matching length; not for stretch or retractable hoses.
Wall hanger for a conventional 25–35-foot hose wound in four or five loops. Not storage for an in-wall retractable hose.
18-by-18-inch mesh caddy for organizing loose cleaning tools. Tools and wall hanger are sold separately.
Maintenance sheets for routine central vacuum hose and pipe care. Follow the label and system instructions; not a substitute for repair of a blockage or damaged system.
Match the full power-unit model, production version, bag collar and filter dimensions. Cyclonic, disposable-bag and permanent-filter systems use different supplies. A similar size or shared brand name is not enough to confirm fit. If a matching supply is not shown, send us the model label and a photo of the old bag or filter. Shop central vacuum bags & filters
For 25+ years, Ace Vacuums has filled the gap left by big-box retailers. We provide the expert repairs, warranty support, and genuine OEM parts that Amazon and Walmart simply don't offer. From free estimates to same-day service, we are your local alternative for professional home care solutions.
Conveniently serving Washington D.C. and Maryland (Montgomery & Prince George's Counties). Our showrooms are just 20 minutes from DC and 10 minutes from Tysons Corner.
Hablamos Español — Service in English & Spanish.
Serving Zip Codes: 20147, 20176, 22030, 22031, 20151, 20190, 22102, 22314, 20110, 20148 & surrounding areas. All repairs performed by certified technicians using genuine parts.
