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Critical HEPA Dry Vacuum 9 Gallon | Enviromaster
Mastercraft® - Enviromaster 9 Gallon Critical HEPA Dry Vacuum: Tackle Bigger Dry Pick-Up Jobs. Model: P4911HVAF-R Ideal for: Homes & Apartments (Large Spaces): Our HEPA Dry Vacuum effectively clean carpets, fu...
$1,209
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1.3 HP
MOTOR
94 CFM
AIRFLOW
9 Gal
POLY TANK
99.97%
HEPA
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Critical HEPA Dry Vacuum 9 Gallon | Enviromaster
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Pro Tip: Pair this vacuum with the 16" Intermediate Filter (2-pack) as a pre-filter stage to extend the life of the expensive HEPA filter. In high-particulate environments, the intermediate filter catches the bulk of debris — protecting the HEPA and cutting filter replacement costs significantly. Shop INFILTRATOR® Filter Bags →
Critical HEPA Dry Vacuum 9 Gallon | Enviromaster
The Enviromaster P4911HVAF-R gives remediation and janitorial crews the most practical balance of capacity and portability in the HEPA dry-pickup category. At 9 gallons, the polyethylene tank handles a full shift of dry hazardous material — fine drywall dust, asbestos fiber, lead-bearing debris — before requiring an emptying stop. The 1.3 HP bypass motor delivers 94 CFM and 84" of waterlift, maintaining consistent suction through a loaded filter. The HEPA filtration system is sealed and rated at 99.97% capture of particles down to 0.3 microns, meeting OSHA requirements for dry hazardous material collection. The bypass motor design keeps the airstream separated from the motor, extending motor life in dusty environments common to restoration and abatement work. Made in Newburgh, NY. For crews moving between multiple rooms or floors, the 9-gallon format is easier to stage and reposition than a 15-gallon unit. It empties less frequently than the 5 or 7-gallon models, reducing interruptions on long cleanup runs. Replacement filters and Infiltrator bags are stocked for immediate dispatch.
- 1.3 HP bypass motor delivers 94 CFM of airflow and 84 inches of waterlift for high-volume dry remediation pickup
- Sealed critical HEPA filter certified at 99.97% efficiency at 0.3 microns using HOT DOP testing method
- Dual-layer filtration combines HEPA filter and Infiltrator enclosed disposable bag for zero bypass contamination
- OSHA 29 CFR 1926.1101 and EPA RRP compliant for asbestos abatement, lead paint remediation, and mold remediation
- 9-gallon rotation-molded polyethylene tank minimizes emptying frequency on larger remediation and restoration projects
- Manufactured in Newburgh, New York with American-made components and backed by Mastercraft manufacturer warranty
| Model | Enviromaster® P4911HVAF-R |
| Type | Critical HEPA Dry Vacuum |
| Motor | 1.3 HP Bypass, 120V |
| Current Draw | 7.5 Amps |
| Waterlift | 84" |
| Airflow (CFM) | 94 |
| Tank Capacity | 9 Gallon (1.25 Bushel) |
| Tank Material | Rotation-Molded Polyethylene |
| HEPA Filter | 16" — Metal casing, micro-fibered glass paper media |
| HEPA Efficiency | 99.97% at 0.3 microns (HOT DOP method) |
| Filtration System | Dual-Layer: HEPA + Infiltrator® Enclosed Bag |
| Pickup Type | Dry Only |
| Hose | 1.5" Crush-Proof Vinyl with Cuffs |
| Hazardous Materials | Mold, Asbestos, Lead Dust, Ceramic Dust, Aluminum, Fiberglass |
| Compliance | OSHA, EPA RRP, HEPA Certified |
| Applications | Mold Remediation, Lead Abatement, Asbestos, Commercial Cleaning |
| Made In | USA — Newburgh, NY |
| 5 Gal Dry | 7 Gal Dry | 9 Gal Dry ★ | 15 Gal Wet/Dry | Probe 10 | |
|---|---|---|---|---|---|
| BEST FOR | Small Jobs / Offices | Mid-Size Spaces / Light Remediation | Mid-Scale Remediation | Heavy Remediation / Wet & Dry | Mobility / Multi-Story Buildings |
| MOTOR | 1.3 HP Bypass | 1.3 HP Bypass | 1.3 HP Bypass | 2 HP Bypass | 1,188W |
| CFM | 94 | 94 | 94 | 112 | 100-130 |
| WATERLIFT | 84" | 84" | 84" | 106" | 100" |
| TANK | 5 Gal Poly | 7 Gal Poly | 9 Gal Poly | 15 Gal Poly | 10 Qt Backpack |
| WET & DRY | × | × | × | ✓ | × |
| HEPA SEALED | ✓ | ✓ | ✓ | ✓ | ✓ |
| PRICE | $1,120 | $1,199 | $1,209 | $2,330 | $995 |
True HEPA. The Enviromaster® HEPA filter is individually certified at 99.97% efficiency at 0.3 microns using the HOT DOP (Dispersed Oil Particulate) testing method at 100 CFM. This is the standard required by OSHA for remediation work involving asbestos, lead dust, and mold. "HEPA-type" filters sold by other manufacturers are not tested to this standard and do not meet OSHA requirements for regulated hazardous material cleanup.
Yes. The Enviromaster® line meets OSHA 29 CFR 1926.1101 (asbestos in construction) and EPA RRP (Renovation, Repair, and Painting) requirements. The sealed critical filtration system prevents hazardous particulate from being re-released during vacuuming. Always verify state and local regulations, as some jurisdictions impose additional requirements beyond federal standards.
Filter bags (Infiltrator® Enclosed Bags) should be replaced after each project or when approximately two-thirds full — never overfill. The HEPA filter should be inspected after every 10–15 project hours and replaced when airflow drops noticeably or when physical damage is visible (tears, crushed media, compromised gasket). In high-exposure environments such as active asbestos or lead abatement, replace the HEPA filter every 30–50 operating hours. Never attempt to clean or wash a HEPA filter — doing so destroys the media and voids HEPA certification.
Bags are sized by tank capacity. The 5, 7, and 9 Gal models use the 5–9 Gal Infiltrator® Filter Bags (5-Pack). The 15 Gal Poly Wet/Dry (P41512WAF) uses the 15–20 Gal Infiltrator® Filter Bags (5-Pack). The Probe 10 Backpack uses the Backpack Filter Bags (10-Pack). All bags are available on mastercraftusa.com under Replacement Parts & Filters.
It depends on the model. The 15 Gal Poly Wet/Dry (P41512WAF) is rated for both wet and dry pickup and includes a float pan assembly that automatically shuts off suction when the tank reaches liquid capacity. The 5, 7, and 9 Gal Dry models and the Probe 10 Backpack are dry-only — using them for liquid pickup will damage the motor and void the warranty.
The sealed critical HEPA system is designed for asbestos fibers (friable and non-friable), lead dust and paint chips, mold spores, ceramic dust, aluminum dust, fiberglass, and pharmaceutical-grade fine particulate in controlled environments. Always use proper PPE and follow applicable OSHA and EPA protocols. After regulated asbestos or lead work, the vacuum and all consumables must be decontaminated or disposed of per applicable hazardous waste regulations.
Mastercraft® strongly recommends using only genuine Infiltrator® filter bags and OEM HEPA filters. Third-party consumables may not maintain the sealed critical filtration integrity required for OSHA-compliant hazardous material vacuuming. Their use may void the warranty and compromise regulatory compliance on regulated job sites.
Mastercraft® backs the Enviromaster® line with a manufacturer's warranty covering defects in materials and workmanship. Replacement HEPA filters, Infiltrator® bags, hoses, wands, and other consumables are stocked and available directly through mastercraftusa.com. For warranty claims or service inquiries, contact Mastercraft USA through the support channel listed on your invoice.
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