MD Central SilentMaster S460r 120 Volt Central Vacuum Power Unit #S1157NH
- Product SKU: S1157NH
- Category: CENTRAL VACUUM, Central Vacuum Systems, MD Central Vacuum
Quick Summary
The MD Central SilentMaster S460r 120 Volt Central Vacuum Power Unit #S1157NH is a premium built-in central vacuum system engineered to deliver powerful whole-home suction, whisper-quiet operation, and dependable long-term performance. Featuring a high-performance 120-volt motor, the SilentMaster S460r efficiently removes dirt, dust, pet hair, allergens, and everyday debris while promoting cleaner indoor air throughout your home.
Available through Authorized MD Dealer Ace Vacuums, the SilentMaster S460r combines advanced sound-reduction technology, premium filtration, and durable construction to provide exceptional cleaning performance for small to medium-sized homes using standard household electrical service.
Product Overview
The MD SilentMaster S460r 120 Volt Central Vacuum Power Unit is designed for homeowners seeking premium cleaning performance without requiring a dedicated 240-volt electrical circuit. Installed remotely in a garage, basement, or utility room, the power unit significantly reduces operating noise while delivering strong, consistent suction through your home's central vacuum piping system.
Its high-performance 120V motor provides excellent airflow for cleaning carpets, area rugs, hardwood floors, tile, laminate, luxury vinyl plank (LVP), and other sealed hard floor surfaces when paired with compatible MD hoses, electric powerheads, telescopic wands, and cleaning accessories.
The advanced filtration system captures dust, pollen, allergens, pet dander, and microscopic airborne particles, while the large-capacity dirt collection system minimizes maintenance and supports longer cleaning sessions.
Purchase confidently from Authorized MD Dealer Ace Vacuums, your trusted source for genuine MD central vacuum systems, replacement parts, and accessories.
Expert Recommendation
Our central vacuum specialists recommend the MD SilentMaster S460r for homeowners seeking dependable whole-home cleaning with quiet operation and efficient 120-volt performance.
Recommended for:
- Small to medium-sized homes
- Multi-level homes
- Pet owners
- Allergy-sensitive households
- Central vacuum upgrades
- New home construction
- Everyday residential cleaning
- Homeowners wanting quieter vacuum operation
Best For
- Small to medium-sized homes
- Whole-home cleaning
- Carpeted homes
- Hardwood floors
- Tile flooring
- Luxury Vinyl Plank (LVP)
- Pet owners
- Allergy sufferers
- Quiet cleaning
- Premium residential central vacuum systems
Not Ideal For
- Apartments without central vacuum piping
- Homes requiring maximum 240V commercial-grade performance
- Portable vacuum users
- Homes without built-in central vacuum piping
Key Features
- High-performance 120-volt motor
- Ultra-quiet SilentMaster technology
- Powerful whole-home suction
- Advanced filtration system
- Large-capacity dirt collection
- Heavy-duty construction
- Low-maintenance operation
- Long motor service life
- Compatible with MD central vacuum accessories
- Excellent airflow performance
- Premium residential cleaning
- Built for dependable long-term reliability
What Makes This Model Stand Out
The SilentMaster S460r combines efficient 120-volt performance with advanced sound-dampening technology to create one of the quietest residential central vacuum systems available. It offers strong suction, advanced filtration, and durable construction while operating on standard household electrical service, making it an ideal solution for homeowners seeking premium cleaning without upgrading to 240 volts.
Product Comparisons
MD SilentMaster S460r vs Traditional Upright Vacuum
MD SilentMaster S460r
- Whole-home central vacuum
- Powerful continuous suction
- Ultra-quiet operation
- Improved indoor air quality
- Large dirt capacity
- Minimal maintenance
Traditional Upright Vacuum
- Portable
- Louder operation
- Smaller dust container
- Frequent emptying
- Limited cleaning coverage
MD SilentMaster S460r vs Standard Central Vacuum
SilentMaster S460r
- Premium 120V motor
- Advanced sound reduction
- Better airflow
- Superior filtration
- Designed for small to medium homes
Standard Central Vacuum
- Standard suction
- Conventional noise levels
- Average filtration
- General residential performance
Questions Buyers Commonly Ask
Is the MD SilentMaster S460r good for pet hair?
Yes. When paired with compatible MD electric powerheads, it effectively removes pet hair, pet dander, and embedded debris from carpets and hard floors.
Why choose the SilentMaster Series?
SilentMaster systems combine powerful suction with advanced sound insulation to create one of the quietest and most comfortable whole-home vacuuming experiences available.
Who benefits most from the SilentMaster S460r?
Families, pet owners, allergy sufferers, and homeowners seeking premium cleaning performance with quiet operation using standard household power.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | MD |
| Model | SilentMaster S460r |
| Part Number | S1157NH |
| Product Type | Central Vacuum Power Unit |
| Voltage | 120 Volts |
| Installation | Built-In Central Vacuum |
| Motor | High-Performance 120V Motor |
| Filtration | Advanced Filtration |
| Collection System | Large-Capacity Dirt Collection |
| Floor Compatibility | Carpet & Sealed Hard Floors |
| Recommended Home Size | Small to Medium Homes |
| Authorized Dealer | Ace Vacuums |
Ideal Buyers
Perfect for:
- Families
- Pet owners
- Allergy-conscious households
- Small to medium-sized homes
- Homeowners replacing older central vacuum systems
- New home construction
- Buyers seeking quiet whole-home cleaning
Why Buy from Ace Vacuums
When you purchase from Authorized MD Dealer Ace Vacuums, you receive:
- Genuine MD central vacuum products
- Expert product recommendations
- Competitive pricing
- Fast nationwide shipping
- Outstanding customer support
- Professional installation guidance
- Genuine MD replacement parts and accessories
Available Online & In-Store
The MD Central SilentMaster S460r 120 Volt Central Vacuum Power Unit #S1157NH is available through Authorized MD Dealer Ace Vacuums.
Shop Online
- Secure online ordering
- Fast nationwide shipping
- Genuine MD products
- Secure checkout
- Expert customer support
Visit Our Showrooms
Visit our Fairfax, VA and Leesburg, VA showroom locations to compare MD central vacuum systems, receive live demonstrations, and speak with experienced central vacuum specialists.
Comparison Table
| Feature | MD SilentMaster S460r | Standard Residential Central Vacuum |
| Voltage | 120 Volts | 120 Volts |
| Suction Power | Premium Performance | Standard |
| Noise Level | Ultra Quiet | Standard |
| Home Size | Small to Medium Homes | Average Homes |
| Dirt Capacity | Large | Standard |
| Pet Hair Removal | Excellent | Very Good |
| Indoor Air Quality | Advanced Filtration | Standard |
| Durability | Heavy-Duty | Standard |
| Support | Authorized MD Dealer Ace Vacuums | Varies |
Pros and Cons
Pros
- Powerful 120V motor
- Ultra-quiet SilentMaster technology
- Strong whole-home suction
- Advanced allergen filtration
- Excellent for homes with pets
- Large-capacity dirt collection
- Heavy-duty construction
- Backed by Authorized MD Dealer Ace Vacuums
Cons
- Requires a built-in central vacuum system
- Professional installation recommended for new systems
- Lower maximum suction than comparable 240V models
Quick Summary
The MD Central SilentMaster S460r 120 Volt Central Vacuum Power Unit #S1157NH is a premium built-in central vacuum system engineered to deliver powerful whole-home suction, whisper-quiet operation, and dependable long-term performance. Featuring a high-performance 120-volt motor, the SilentMaster S460r efficiently removes dirt, dust, pet hair, allergens, and everyday debris while promoting cleaner indoor air throughout your home.
Available through Authorized MD Dealer Ace Vacuums, the SilentMaster S460r combines advanced sound-reduction technology, premium filtration, and durable construction to provide exceptional cleaning performance for small to medium-sized homes using standard household electrical service.
Product Overview
The MD SilentMaster S460r 120 Volt Central Vacuum Power Unit is designed for homeowners seeking premium cleaning performance without requiring a dedicated 240-volt electrical circuit. Installed remotely in a garage, basement, or utility room, the power unit significantly reduces operating noise while delivering strong, consistent suction through your home's central vacuum piping system.
Its high-performance 120V motor provides excellent airflow for cleaning carpets, area rugs, hardwood floors, tile, laminate, luxury vinyl plank (LVP), and other sealed hard floor surfaces when paired with compatible MD hoses, electric powerheads, telescopic wands, and cleaning accessories.
The advanced filtration system captures dust, pollen, allergens, pet dander, and microscopic airborne particles, while the large-capacity dirt collection system minimizes maintenance and supports longer cleaning sessions.
Purchase confidently from Authorized MD Dealer Ace Vacuums, your trusted source for genuine MD central vacuum systems, replacement parts, and accessories.
Expert Recommendation
Our central vacuum specialists recommend the MD SilentMaster S460r for homeowners seeking dependable whole-home cleaning with quiet operation and efficient 120-volt performance.
Recommended for:
- Small to medium-sized homes
- Multi-level homes
- Pet owners
- Allergy-sensitive households
- Central vacuum upgrades
- New home construction
- Everyday residential cleaning
- Homeowners wanting quieter vacuum operation
Best For
- Small to medium-sized homes
- Whole-home cleaning
- Carpeted homes
- Hardwood floors
- Tile flooring
- Luxury Vinyl Plank (LVP)
- Pet owners
- Allergy sufferers
- Quiet cleaning
- Premium residential central vacuum systems
Not Ideal For
- Apartments without central vacuum piping
- Homes requiring maximum 240V commercial-grade performance
- Portable vacuum users
- Homes without built-in central vacuum piping
Key Features
- High-performance 120-volt motor
- Ultra-quiet SilentMaster technology
- Powerful whole-home suction
- Advanced filtration system
- Large-capacity dirt collection
- Heavy-duty construction
- Low-maintenance operation
- Long motor service life
- Compatible with MD central vacuum accessories
- Excellent airflow performance
- Premium residential cleaning
- Built for dependable long-term reliability
What Makes This Model Stand Out
The SilentMaster S460r combines efficient 120-volt performance with advanced sound-dampening technology to create one of the quietest residential central vacuum systems available. It offers strong suction, advanced filtration, and durable construction while operating on standard household electrical service, making it an ideal solution for homeowners seeking premium cleaning without upgrading to 240 volts.
Product Comparisons
MD SilentMaster S460r vs Traditional Upright Vacuum
MD SilentMaster S460r
- Whole-home central vacuum
- Powerful continuous suction
- Ultra-quiet operation
- Improved indoor air quality
- Large dirt capacity
- Minimal maintenance
Traditional Upright Vacuum
- Portable
- Louder operation
- Smaller dust container
- Frequent emptying
- Limited cleaning coverage
MD SilentMaster S460r vs Standard Central Vacuum
SilentMaster S460r
- Premium 120V motor
- Advanced sound reduction
- Better airflow
- Superior filtration
- Designed for small to medium homes
Standard Central Vacuum
- Standard suction
- Conventional noise levels
- Average filtration
- General residential performance
Questions Buyers Commonly Ask
Is the MD SilentMaster S460r good for pet hair?
Yes. When paired with compatible MD electric powerheads, it effectively removes pet hair, pet dander, and embedded debris from carpets and hard floors.
Why choose the SilentMaster Series?
SilentMaster systems combine powerful suction with advanced sound insulation to create one of the quietest and most comfortable whole-home vacuuming experiences available.
Who benefits most from the SilentMaster S460r?
Families, pet owners, allergy sufferers, and homeowners seeking premium cleaning performance with quiet operation using standard household power.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | MD |
| Model | SilentMaster S460r |
| Part Number | S1157NH |
| Product Type | Central Vacuum Power Unit |
| Voltage | 120 Volts |
| Installation | Built-In Central Vacuum |
| Motor | High-Performance 120V Motor |
| Filtration | Advanced Filtration |
| Collection System | Large-Capacity Dirt Collection |
| Floor Compatibility | Carpet & Sealed Hard Floors |
| Recommended Home Size | Small to Medium Homes |
| Authorized Dealer | Ace Vacuums |
Ideal Buyers
Perfect for:
- Families
- Pet owners
- Allergy-conscious households
- Small to medium-sized homes
- Homeowners replacing older central vacuum systems
- New home construction
- Buyers seeking quiet whole-home cleaning
Why Buy from Ace Vacuums
When you purchase from Authorized MD Dealer Ace Vacuums, you receive:
- Genuine MD central vacuum products
- Expert product recommendations
- Competitive pricing
- Fast nationwide shipping
- Outstanding customer support
- Professional installation guidance
- Genuine MD replacement parts and accessories
Available Online & In-Store
The MD Central SilentMaster S460r 120 Volt Central Vacuum Power Unit #S1157NH is available through Authorized MD Dealer Ace Vacuums.
Shop Online
- Secure online ordering
- Fast nationwide shipping
- Genuine MD products
- Secure checkout
- Expert customer support
Visit Our Showrooms
Visit our Fairfax, VA and Leesburg, VA showroom locations to compare MD central vacuum systems, receive live demonstrations, and speak with experienced central vacuum specialists.
Comparison Table
| Feature | MD SilentMaster S460r | Standard Residential Central Vacuum |
| Voltage | 120 Volts | 120 Volts |
| Suction Power | Premium Performance | Standard |
| Noise Level | Ultra Quiet | Standard |
| Home Size | Small to Medium Homes | Average Homes |
| Dirt Capacity | Large | Standard |
| Pet Hair Removal | Excellent | Very Good |
| Indoor Air Quality | Advanced Filtration | Standard |
| Durability | Heavy-Duty | Standard |
| Support | Authorized MD Dealer Ace Vacuums | Varies |
Pros and Cons
Pros
- Powerful 120V motor
- Ultra-quiet SilentMaster technology
- Strong whole-home suction
- Advanced allergen filtration
- Excellent for homes with pets
- Large-capacity dirt collection
- Heavy-duty construction
- Backed by Authorized MD Dealer Ace Vacuums
Cons
- Requires a built-in central vacuum system
- Professional installation recommended for new systems
- Lower maximum suction than comparable 240V models
Frequently Asked Questions
1. What is the MD Central SilentMaster S460r 120 Volt Central Vacuum Power Unit #S1157NH designed for?
It is designed to provide whole-home central vacuum cleaning for residential properties, with a published coverage recommendation of up to approximately 6,000 square feet.
2. What type of motor does the S460r use?
It uses a single 3-stage 5.7-inch by-pass motor designed to provide strong suction and airflow performance.
3. How much suction performance does the power unit provide?
The unit is rated at up to 458 air watts, 101 CFM airflow, and 139 inches of water lift.
4. What is the collection capacity of this central vacuum?
It has an 8-gallon Tru-Seal closed-bag collection system.
5. Does the S460r use a bagged filtration system?
Yes. The Tru-Seal system uses a closed replacement bag to collect dirt and debris.
6. What is Tru-Seal closed-bag filtration?
It is a closed-bag microfiltration system designed to contain collected debris while filtering the air passing through the central vacuum.
7. Is this model suitable for a larger home?
Yes. The S460r is published as covering homes up to approximately 6,000 square feet, depending on the overall system design and installation.
8. Does the unit include a utility valve?
Yes. The utility valve provides a convenient connection point for cleaning areas close to the power unit.
9. What is the noise rating of this model?
The published noise rating is approximately 62 dB.
10. Is the power unit made from steel?
Yes. The body and lid use durable 20-gauge steel, with powder coating on the interior and exterior.
11. Does the S460r have dual exhaust?
Yes. Dual exhaust is one of the listed features of the S460r.
12. Does it have flexible intake connections?
Yes. The power unit has both right and left intake valves, which can provide installation flexibility.
13. How often should the collection bag be replaced?
Replacement frequency depends on the amount of debris collected and how frequently the system is used. Replace the bag when it becomes full or begins to affect airflow and cleaning performance.
14. Can this model replace an existing central vacuum power unit?
It can be used as a replacement when the existing central vacuum system is compatible. Before ordering, verify the voltage, tubing connections, mounting location, and other installation requirements.
15. What warranty is available for this model?
The S460r is listed with a 12-year warranty in the published product specifications. Warranty coverage is subject to the manufacturer's terms and conditions.
Visit Our Showrooms
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Address: 11110 Main St, Fairfax, VA 22030
Landmark: Opposite Havertys Furniture Store
Best for: Bethesda, Potomac, Arlington, NW Washington D.C.
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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
Shipping, Return & Refund Policy
Shipping Policy
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.
Returns and refunds
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.
30-Day Returns, Refunds and Exchanges
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.
Eligibility and authorization
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.
Fees and shipping
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.
Final-sale and excluded items
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.
Damaged, defective, incorrect or missing items; recalls
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.
Refund timing and exchanges
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.
Applicable rights and earlier purchases
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.
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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.
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