The Nadair ST-700-25H is a compact central vacuum power unit with 700 airwatts, 141.2 inches of water lift, and 140.2 CFM of airflow. Its 25 L bottom-load canister and hybrid filtration system let you operate it with a disposable bag or in bagless mode with the permanent washable filter installed.
Authorized Nadair Dealer Ace Vacuums can help you compare this whole-house vacuum with your existing piping and choose compatible hose and attachment options. The unit includes a 10-year residential warranty, with 1 year of labor coverage.
The Nadair ST-700-25H is designed for homeowners who want a compact central vacuum system with strong airflow and flexible filtration. It connects to an existing central vacuum piping network and is operated through compatible hose inlets rather than carried from room to room like a portable vacuum.
Its 700-airwatt motor produces 141.2 inches of water lift and 140.2 CFM. That combination provides the power unit's stated suction and airflow performance, while the 63 dB operating level, noise-isolating foam, and integrated muffler help reduce sound at the machine.
The hybrid cyclonic filtration system can be used with or without disposable filtration bags. One triple-layer disposable bag and one permanent machine-washable filter are included, and Nadair states that the filtration system filters up to 99.97%. The permanent filter must remain installed during operation, including when a bag is being used.
A bottom-load 25 L canister gives the ST-700-25H a practical balance between capacity and compact dimensions. The rolled steel canister is designed to resist wear, corrosion, and damage, while the top air intake helps simplify installation on an existing piping network.
This model is a good fit when you want hybrid operation, a 25 L capacity, and the compact format of Nadair's ST Series. Bagged operation can make debris disposal more contained, while bagless operation avoids regular disposable-bag use; either method still requires the permanent filter to stay in place and receive the required care.
The ST-700-25H is not automatically the right choice for every home or piping layout. Ace Vacuums can help size the unit for the home and piping run, confirm that the existing system uses compatible 2-inch outside-diameter PVC piping, and identify a hose and attachment kit that matches the home's low-voltage or electric inlet configuration.
A sibling model may be preferable when priorities differ. The ST-700-35H provides the same listed motor performance, airflow, water lift, noise level, and hybrid filtration but increases capacity to 35 L / 9.25 gal. The less expensive ST-600-18B has an 18 L canister and is bag-only, while the HD-750 models add higher listed performance and soft start/stop.
A useful choice for homeowners who want the option of using a triple-layer disposable bag or operating bagless with the included permanent washable filter.
The compact ST Series format and top air intake can work well where an existing central vacuum piping network must be connected in a limited indoor utility space.
Bagged operation offers a more contained way to remove collected debris, while the 25 L / 6.6 gal canister provides room for routine whole-house cleaning.
The hybrid cyclonic filtration system is stated to filter up to 99.97% and includes a triple-layer bag plus a permanent filter.
The 63 dB rating, noise-isolating foam, and integrated muffler are intended to reduce operating noise at the power unit.
The top air intake and compatibility with standard 2-inch outside-diameter PVC central vacuum piping support replacement or connection to an existing network.
The main advantage of the ST-700-25H is its balance of capacity, performance, and filtration flexibility. It has the same listed 700-airwatt motor performance as the larger ST-700-35H, but uses a 25 L canister in the more compact ST Series format.
The hybrid design also gives homeowners a choice in everyday maintenance. Use the included triple-layer bag when you prefer disposable containment, or operate bagless with the included permanent filter; in both cases, the permanent filter must stay installed and must be washed with cold water whenever the canister is emptied.
Both models are rated at 700 airwatts, 141.2 inches of water lift, 140.2 CFM, and 63 dB, and both use hybrid filtration with or without a disposable bag. The ST-700-35H increases canister capacity from 25 L / 6.6 gal to 35 L / 9.25 gal, so it may be a better fit when less frequent emptying is more important than compact capacity.
The ST-600-18B is a smaller 18 L / 4.75 gal bag-only unit with 600 airwatts, 140.9 inches of water lift, 127.1 CFM, and a 62 dB rating. The ST-700-25H offers higher listed airwatts and airflow, a larger canister, and the option of bagless operation.
The HD-750-22H is rated at 750 airwatts, 146 inches of water lift, and 141.2 CFM, compared with 700 airwatts, 141.2 inches, and 140.2 CFM for the ST-700-25H. The HD model has a 22 L / 5.81 gal canister, a 65 dB rating, hybrid filtration, and soft start/stop, while the ST model has a 25 L / 6.6 gal canister and a 63 dB rating.
A central vacuum power unit stays in a garage, basement, or other suitable indoor utility location, so you do not carry the main machine from room to room. The system connects to inlets through installed piping, and its exhaust can be vented outdoors when the installation allows; the hose and cleaning tools are separate components.
The unit is designed to fit existing standard 2-inch outside-diameter PVC central vacuum piping meeting ASTM F2158. Ace Vacuums can help verify the piping and evaluate the home's piping run before selecting the power unit.
Yes. The hybrid filtration system supports bagged or bagless operation, and one triple-layer disposable bag is included. The permanent filter must remain installed in either mode.
Yes. Nadair's manual instructs users to wash the permanent filter with cold water each time the canister is emptied. It should be replaced every year to maintain the warranty.
No hose or cleaning attachment kit is listed as included. These items are sold separately and must match the home's inlets, including whether the system uses low-voltage or electric hose operation.
The manual advises replacing the bag or emptying the canister three or four times per year. Actual timing depends on use, and the permanent filter should be washed with cold water whenever the canister is emptied.
| Specification | Details |
|---|---|
| Brand | Nadair |
| Model | ST-700-25H |
| Series | ST Series (Compact) |
| Motor | 5.7-inch, 2-stage Ametek thru-flow motor |
| Airwatts | 700 AW |
| Water Lift | 141.2 inches |
| Airflow | 140.2 CFM |
| Noise Level | 63 dB |
| Canister Capacity | 25 L / 6.6 gal |
| Canister Material | Rolled steel |
| Canister Loading | Bottom load |
| Filtration | Hybrid cyclonic filtration; use with or without a disposable bag; filters up to 99.97% |
| Replacement Bag | FD-12.5L-3NAD bag |
| Replacement Filter | FP-8 permanent filter |
| Air Intake | Top |
| Electrical | 15 A, 110-120 VAC, 60 Hz circuit; an own circuit is recommended but not required |
| Power Cord | 72 inches / 1.83 m grounded power cord |
| Dimensions | 12.91 inches deep x 25.39 inches high x 12.52 inches wide |
| Included | One triple-layer disposable filtration bag and one permanent machine-washable filter |
| Warranty | 10 years of parts coverage on the motor, electronic module, body, housing, and dust canister, with 1 year of labor; residential use only |
| Piping Compatibility | Standard 2-inch outside-diameter PVC piping meeting ASTM F2158 |
| Authorized Dealer | Ace Vacuums |
Perfect for:
When you purchase from Authorized Nadair Dealer Ace Vacuums, you receive:
The Nadair ST-700-25H 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-700-25H | Nadair ST-700-35H |
|---|---|---|
| Series | ST Series (Compact) | ST Series |
| Airwatts | 700 AW | 700 AW |
| Water lift | 141.2 inches | 141.2 inches |
| Airflow | 140.2 CFM | 140.2 CFM |
| Noise level | 63 dB | 63 dB |
| Canister capacity | 25 L / 6.6 gal | 35 L / 9.25 gal |
| Filtration | Hybrid cyclonic, with or without bag, up to 99.97% | Hybrid cyclonic, with or without bag, up to 99.97% |
| Model | ST-700-25H | ST-700-35H |
The Nadair ST-700-25H is a compact central vacuum power unit with 700 airwatts, 141.2 inches of water lift, and 140.2 CFM of airflow. Its 25 L bottom-load canister and hybrid filtration system let you operate it with a disposable bag or in bagless mode with the permanent washable filter installed.
Authorized Nadair Dealer Ace Vacuums can help you compare this whole-house vacuum with your existing piping and choose compatible hose and attachment options. The unit includes a 10-year residential warranty, with 1 year of labor coverage.
The Nadair ST-700-25H is designed for homeowners who want a compact central vacuum system with strong airflow and flexible filtration. It connects to an existing central vacuum piping network and is operated through compatible hose inlets rather than carried from room to room like a portable vacuum.
Its 700-airwatt motor produces 141.2 inches of water lift and 140.2 CFM. That combination provides the power unit's stated suction and airflow performance, while the 63 dB operating level, noise-isolating foam, and integrated muffler help reduce sound at the machine.
The hybrid cyclonic filtration system can be used with or without disposable filtration bags. One triple-layer disposable bag and one permanent machine-washable filter are included, and Nadair states that the filtration system filters up to 99.97%. The permanent filter must remain installed during operation, including when a bag is being used.
A bottom-load 25 L canister gives the ST-700-25H a practical balance between capacity and compact dimensions. The rolled steel canister is designed to resist wear, corrosion, and damage, while the top air intake helps simplify installation on an existing piping network.
This model is a good fit when you want hybrid operation, a 25 L capacity, and the compact format of Nadair's ST Series. Bagged operation can make debris disposal more contained, while bagless operation avoids regular disposable-bag use; either method still requires the permanent filter to stay in place and receive the required care.
The ST-700-25H is not automatically the right choice for every home or piping layout. Ace Vacuums can help size the unit for the home and piping run, confirm that the existing system uses compatible 2-inch outside-diameter PVC piping, and identify a hose and attachment kit that matches the home's low-voltage or electric inlet configuration.
A sibling model may be preferable when priorities differ. The ST-700-35H provides the same listed motor performance, airflow, water lift, noise level, and hybrid filtration but increases capacity to 35 L / 9.25 gal. The less expensive ST-600-18B has an 18 L canister and is bag-only, while the HD-750 models add higher listed performance and soft start/stop.
A useful choice for homeowners who want the option of using a triple-layer disposable bag or operating bagless with the included permanent washable filter.
The compact ST Series format and top air intake can work well where an existing central vacuum piping network must be connected in a limited indoor utility space.
Bagged operation offers a more contained way to remove collected debris, while the 25 L / 6.6 gal canister provides room for routine whole-house cleaning.
The hybrid cyclonic filtration system is stated to filter up to 99.97% and includes a triple-layer bag plus a permanent filter.
The 63 dB rating, noise-isolating foam, and integrated muffler are intended to reduce operating noise at the power unit.
The top air intake and compatibility with standard 2-inch outside-diameter PVC central vacuum piping support replacement or connection to an existing network.
The main advantage of the ST-700-25H is its balance of capacity, performance, and filtration flexibility. It has the same listed 700-airwatt motor performance as the larger ST-700-35H, but uses a 25 L canister in the more compact ST Series format.
The hybrid design also gives homeowners a choice in everyday maintenance. Use the included triple-layer bag when you prefer disposable containment, or operate bagless with the included permanent filter; in both cases, the permanent filter must stay installed and must be washed with cold water whenever the canister is emptied.
Both models are rated at 700 airwatts, 141.2 inches of water lift, 140.2 CFM, and 63 dB, and both use hybrid filtration with or without a disposable bag. The ST-700-35H increases canister capacity from 25 L / 6.6 gal to 35 L / 9.25 gal, so it may be a better fit when less frequent emptying is more important than compact capacity.
The ST-600-18B is a smaller 18 L / 4.75 gal bag-only unit with 600 airwatts, 140.9 inches of water lift, 127.1 CFM, and a 62 dB rating. The ST-700-25H offers higher listed airwatts and airflow, a larger canister, and the option of bagless operation.
The HD-750-22H is rated at 750 airwatts, 146 inches of water lift, and 141.2 CFM, compared with 700 airwatts, 141.2 inches, and 140.2 CFM for the ST-700-25H. The HD model has a 22 L / 5.81 gal canister, a 65 dB rating, hybrid filtration, and soft start/stop, while the ST model has a 25 L / 6.6 gal canister and a 63 dB rating.
A central vacuum power unit stays in a garage, basement, or other suitable indoor utility location, so you do not carry the main machine from room to room. The system connects to inlets through installed piping, and its exhaust can be vented outdoors when the installation allows; the hose and cleaning tools are separate components.
The unit is designed to fit existing standard 2-inch outside-diameter PVC central vacuum piping meeting ASTM F2158. Ace Vacuums can help verify the piping and evaluate the home's piping run before selecting the power unit.
Yes. The hybrid filtration system supports bagged or bagless operation, and one triple-layer disposable bag is included. The permanent filter must remain installed in either mode.
Yes. Nadair's manual instructs users to wash the permanent filter with cold water each time the canister is emptied. It should be replaced every year to maintain the warranty.
No hose or cleaning attachment kit is listed as included. These items are sold separately and must match the home's inlets, including whether the system uses low-voltage or electric hose operation.
The manual advises replacing the bag or emptying the canister three or four times per year. Actual timing depends on use, and the permanent filter should be washed with cold water whenever the canister is emptied.
| Specification | Details |
|---|---|
| Brand | Nadair |
| Model | ST-700-25H |
| Series | ST Series (Compact) |
| Motor | 5.7-inch, 2-stage Ametek thru-flow motor |
| Airwatts | 700 AW |
| Water Lift | 141.2 inches |
| Airflow | 140.2 CFM |
| Noise Level | 63 dB |
| Canister Capacity | 25 L / 6.6 gal |
| Canister Material | Rolled steel |
| Canister Loading | Bottom load |
| Filtration | Hybrid cyclonic filtration; use with or without a disposable bag; filters up to 99.97% |
| Replacement Bag | FD-12.5L-3NAD bag |
| Replacement Filter | FP-8 permanent filter |
| Air Intake | Top |
| Electrical | 15 A, 110-120 VAC, 60 Hz circuit; an own circuit is recommended but not required |
| Power Cord | 72 inches / 1.83 m grounded power cord |
| Dimensions | 12.91 inches deep x 25.39 inches high x 12.52 inches wide |
| Included | One triple-layer disposable filtration bag and one permanent machine-washable filter |
| Warranty | 10 years of parts coverage on the motor, electronic module, body, housing, and dust canister, with 1 year of labor; residential use only |
| Piping Compatibility | Standard 2-inch outside-diameter PVC piping meeting ASTM F2158 |
| Authorized Dealer | Ace Vacuums |
Perfect for:
When you purchase from Authorized Nadair Dealer Ace Vacuums, you receive:
The Nadair ST-700-25H 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-700-25H | Nadair ST-700-35H |
|---|---|---|
| Series | ST Series (Compact) | ST Series |
| Airwatts | 700 AW | 700 AW |
| Water lift | 141.2 inches | 141.2 inches |
| Airflow | 140.2 CFM | 140.2 CFM |
| Noise level | 63 dB | 63 dB |
| Canister capacity | 25 L / 6.6 gal | 35 L / 9.25 gal |
| Filtration | Hybrid cyclonic, with or without bag, up to 99.97% | Hybrid cyclonic, with or without bag, up to 99.97% |
| Model | ST-700-25H | ST-700-35H |
It is a central vacuum power unit in Nadair's ST Series (Compact). It connects to an installed piping network and uses compatible hoses and inlets to clean throughout the home.
The unit is rated at 700 airwatts, with 141.2 inches of water lift and 140.2 CFM of airflow. Its motor is a 5.7-inch, 2-stage Ametek thru-flow design.
Hybrid filtration means you can use the power unit with a disposable bag or operate it bagless. The permanent filter must remain installed in both configurations.
The specified replacement bag is the FD-12.5L-3NAD triple-layer bag. One bag is included, and replacement bags are sold in packs of three.
The specified replacement filter is the FP-8 permanent filter. It is washable with cold water and should be replaced every year to maintain the warranty.
Yes. The system supports bagless operation when the permanent filter is installed. The filter must stay in place at all times, and bagless operation still requires regular canister emptying and filter washing.
Wash it with cold water every time the canister is emptied. Nadair's manual also says to replace it every year to keep the warranty.
The stated noise level is 63 dB. The unit also uses noise-isolating foam and an integrated muffler for additional noise reduction.
It is designed for standard 2-inch outside-diameter PVC central vacuum piping meeting ASTM F2158. Existing installations should still be checked before purchase and installation.
No hose or cleaning tool kit is listed as included. The hose and attachments are sold separately and must match the home's inlet type, including low-voltage or electric compatibility.
The manual specifies a 15 A, 110-120 VAC, 60 Hz circuit. An own circuit is recommended but not required; do not use an extension cord or adapter.
No. The manual says to install it indoors in a well-ventilated, weather-protected location away from heat. At least 6 inches of clearance should be left around the unit.
Outdoor venting is recommended when the installation permits it. The exhaust should not point at a wall or ceiling or discharge into a closed space.
Nadair advises emptying the canister or replacing the bag three or four times per year. The actual schedule depends on how much the system is used.
The bottom-load rolled steel canister holds 25 L, or 6.6 gallons. Its removable design is intended to make emptying easier wherever the unit is installed.
The residential warranty lasts 10 years for parts on the motor, electronic module, body, housing, and dust canister, with 1 year of labor. The warranty is for residential use only, and the filter replacement schedule must be followed to maintain it.
Yes. Ace Vacuums can help size the unit for the home and piping run, verify piping compatibility, and identify a hose and attachment kit that matches the home's inlet and wiring configuration.
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Best for: Ashburn, Sterling, Frederick MD, Loudoun County
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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.
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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.
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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.
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Serving Zip Codes: 20147, 20176, 22030, 22031, 20151, 20190, 22102, 22314, 20110, 20148 & surrounding areas. All repairs performed by certified technicians using genuine parts.
