Middle Atlantic HR-QBP-1 Half-Rack Quiet Blower Panel
Overview
The Middle Atlantic HR-QBP-1 is a 1U active cooling panel built for half-rack enclosures where thermal management is non-negotiable but noise cannot dominate the room. Running at 50 CFM with a 32dB acoustic rating, it moves enough air to keep densely packed AV and security gear within operating temperature — without the constant white noise of a conventional blower. If you're deploying rack-mounted NVRs, managed switches, or UPS units in a client-facing space (reception, conference room, or small server closet with occupants nearby), the HR-QBP-1 is engineered specifically for that tradeoff.
Sourced directly from Middle Atlantic's thermal management line, this unit fits the half-rack form factor at 10.4 inches wide — purpose-built for Middle Atlantic's own half-rack enclosure series and compatible third-party 10-inch rack systems. It occupies a single rack unit, leaving the rest of your rack accessory space for equipment rather than cooling hardware.
Key Features
- 50 CFM Active Airflow: At 50 cubic feet per minute, the HR-QBP-1 moves enough air to cool a 1U–4U stack of network gear, NVRs, or AV processors. Passive venting in a sealed half-rack enclosure typically fails by 60–70°F ambient; active cooling at this CFM rating keeps equipment operating through sustained load. Relevant if your rack lives in a mechanical room or anywhere ambient temps climb above 75°F.
- 32dB Quiet Blower Design: Standard rack fans run 45–55dB. At 32dB, this unit is perceptible in a quiet room but not distracting — comparable to a desktop PC fan at idle. For conference rooms, reception desks, or small rack closets adjacent to occupied spaces, that 13–23dB reduction is the difference between a complaint and no complaint.
- 1U Half-Rack Form Factor (10.4 in. W): The half-rack width (10.4 inches, or 26.4 cm) means this panel is not compatible with standard 19-inch full-rack rails. It's sized for 10-inch half-rack enclosures. Verify your enclosure width before ordering — this is the single most common installation mismatch on half-rack cooling panels.
- 120V AC Input, 12VDC Internal: Plugs into standard North American 120V AC. The internal power supply steps down to 12VDC to drive the blower motor — no external power brick, no separate transformer. One cable from the panel to the nearest rack power strip and you're done.
- 10.1-Inch Depth: At 10.1 inches (25.7 cm) deep, the HR-QBP-1 fits standard half-rack enclosures with interior depths of 12 inches or more. Verify your enclosure's usable interior depth, especially if cable management takes rear space.
- 2-Point Rack Mount: Ships with a 2-point mounting configuration — standard for 1U panels. Installation is straightforward: align to the rack rails, secure with the provided hardware, connect power. No special tooling or brackets required beyond what comes with the unit.
- Black Powder Coat Finish: The powder coat finish holds up in rack environments where equipment is pulled and pushed repeatedly. More durable than painted finishes for front-panel components that see regular contact.
Integration & Compatibility
The HR-QBP-1 is designed for half-rack enclosures using a 10-inch (approximately 10.4 in.) rail width. It is not a standard 19-inch rack panel and will not fit full-size rack cabinets without an adapter shelf — which would defeat the form factor. Middle Atlantic half-rack enclosures are the primary target, but any 10-inch half-rack with standard EIA spacing for 1U panels will accept it.
For deployments pairing this unit with high-density NVRs or PoE switches generating significant heat, pair the HR-QBP-1 with a rack cooling strategy that also addresses intake and exhaust airflow paths. A single blower panel without directed airflow (baffles, blanks in unused slots) will recirculate hot air rather than exhaust it. Fill unused rack spaces with blank panels to force air through equipment rather than around it.
The unit ships at 3.7 lbs (1.7 kg) — light enough that a single integrator can handle rack installation without a second person. The HR-QBP-1 (often searched as HR QBP 1) is available as a standalone replacement or upgrade for half-rack deployments that previously relied on passive venting.
Frequently Asked Questions
Q: Will the HR-QBP-1 fit a standard 19-inch full-rack cabinet?
A: No. The HR-QBP-1 is 10.4 inches wide and is sized for 10-inch half-rack enclosures. It will not mount in a standard 19-inch rack without an adapter shelf, which is not included and would change the form factor purpose entirely. Confirm your enclosure uses a 10-inch rail width before ordering.
Q: How loud is 32dB in practice?
A: At 32dB, the HR-QBP-1 is roughly equivalent to a quiet library or a desktop PC fan at low speed — perceptible in a silent room, but not disruptive. Standard rack fans run 45–55dB, so this unit is noticeably quieter for client-facing or occupied spaces.
Q: What power source does the HR-QBP-1 require?
A: The unit requires 120V AC input — standard North American outlet or rack PDU. It converts internally to 12VDC to drive the blower motor. No external power supply or transformer is needed.
Q: How deep is the HR-QBP-1, and will it fit my enclosure?
A: The HR-QBP-1 is 10.1 inches (25.7 cm) deep. It will fit half-rack enclosures with an interior usable depth of at least 10.5 inches. If your enclosure has rear cable managers or equipment occupying rear space, measure the available depth before installing.
Q: Does the HR-QBP-1 require any special wiring or a dedicated circuit?
A: No dedicated circuit is required. The unit draws standard 120V AC and can connect to any rack power distribution unit (PDU) or nearby outlet. It is an active panel — power must be on for the blower to operate.
Q: Can this blower panel be used as the sole cooling for a fully loaded half-rack?
A: At 50 CFM, the HR-QBP-1 provides meaningful active cooling, but effectiveness depends on how well airflow is directed through the enclosure. Unused rack spaces should be filled with blank panels to force air through equipment rather than around it. In high-density deployments with multiple high-wattage devices, assess total heat load and consider supplemental cooling or a second unit if the enclosure supports it.
The HR-QBP-1 is one of those components that prevents a service call six months after install. I've seen half-rack NVR deployments in small conference rooms where the integrator skipped active cooling — within a year, the NVR was throttling or failing due to sustained heat. At 50 CFM and 32dB, this panel addresses the thermal problem without creating an acoustic one, which is the real engineering challenge in occupied spaces.
Technical Highlights:
- 50 CFM at 32dB: That ratio — high airflow, low noise — is harder to achieve than it looks. Most 50 CFM fans run 44–50dB. The 32dB rating here reflects a larger, slower blade design that moves the same air with less turbulence noise. Meaningful in any client-visible installation.
- 120V AC to 12VDC Internal Conversion: The internal power supply eliminates the external brick that plagues some competing panels. One AC connection to the rack PDU and the panel is self-contained. Simpler cable management, fewer failure points.
- 1U at 10.4 in. W: A single rack unit consumed for full active cooling is an efficient trade in a half-rack where every slot costs you equipment space. The 10.4-inch width confirms this is strictly a half-rack component — non-negotiable to verify before procurement.
Deployment Considerations:
- Blank out all unused rack spaces with filler panels before commissioning. Without blanks, the blower pulls recirculated warm air instead of cool room air — you get fan noise and no real cooling benefit. This is the most common field mistake on small rack deployments.
- The 10.1-inch depth leaves limited clearance in shallow half-rack enclosures. Measure your enclosure's usable interior depth (not just the stated external depth) and confirm at least 10.5 inches of clear space before the rear panel or cable tray.
This panel is the right specification for a half-rack security or AV enclosure in a conference room, reception area, or small NOC annex — anywhere the equipment density generates real heat but acoustic intrusion is a legitimate constraint. For full 19-inch rack deployments, look at Middle Atlantic's full-width cooling panel options instead.
