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DNRW Watertight Duct Detector Housing – Outdoor HVAC Duct Mount Smoke Detector Enclosure for Commercial & Industrial Buildings

$325.00

Specifications

The DNRW is a watertight, non-relay intelligent photoelectric low-flow duct smoke housing engineered for outdoor, wash-down, and moisture-prone HVAC applications where standard indoor duct housings won’t hold up.

  • Model: DNRW Watertight Duct Housing
  • Brand: System Sensor
  • Enclosure Rating: Watertight (designed for moisture-exposed environments)
  • Sensing Type: Intelligent photoelectric, low-flow compatible
  • Relay Output: None (non-relay housing)
  • Detector Head: Sold separately (compatible photoelectric head required)
  • Typical Use: Rooftop HVAC units, outdoor plenums, wash-down areas
  • Sampling Infrastructure: Standard sampling tube connections
  • Mounting: External duct-mount hardware
  • Material: Weather-resistant thermoplastic
  • Operating Environment: Moisture-prone and outdoor duct locations
  • Application: Commercial and industrial HVAC exposed installations

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DNRW Watertight Duct Detector Housing – Outdoor HVAC Duct Mount Smoke Detector Enclosure for Commercial & Industrial Buildings
DNRW Watertight Duct Detector Housing – Outdoor HVAC Duct Mount Smoke Detector Enclosure for Commercial & Industrial Buildings
$325.00

DNRW Watertight Duct Housing

The DNRW Watertight Duct Housing is a System Sensor non-relay photoelectric low-flow duct smoke housing designed for installations where moisture, wash-down, or outdoor exposure is a real concern. Unlike standard indoor-rated duct housings, the DNRW is built with a watertight enclosure that protects the detector head and sampling infrastructure from water ingress, condensation, and incidental splashing critical for rooftop HVAC units, parking-garage exhaust runs, food-service extract ducts, and outdoor air-handler plenums. The detector head is sold separately, giving integrators flexibility to pair the DNRW with the correct compatible photoelectric sensor for their host fire alarm platform.

Features

  • Watertight housing construction for harsh-environment duct protection
  • Non-relay design keeps the housing compact and focused on sensing
  • Low-flow photoelectric sensing compatibility for modern HVAC airflow ranges
  • Detector head sold separately for platform-specific pairing flexibility
  • Durable exterior suitable for rooftop and outdoor duct installations
  • Integrated sampling tube connections for conventional ducts
  • Intelligent operation when paired with compatible addressable detector heads

Benefits

Choosing the DNRW over a standard indoor duct housing translates into real reliability gains in outdoor-exposed mechanical systems. Rooftop units, underground parking exhausts, and foodservice ducts experience temperature swings and moisture loads that cause standard housings to develop nuisance troubles or corrode internal electronics. The DNRW’s watertight construction protects both the detector head and the sampling chamber, extending service life and reducing unplanned maintenance calls. Because the head is sold separately, integrators can select the exact intelligent head that matches their fire alarm protocol, there’s no hardware overspecification. For facility owners with outdoor mechanical plants, the DNRW helps ensure duct-side detection survives the weather the rest of the rooftop does.

Why Choose QuickShipFire?

  • Specialty stocking of DNRW housings that regional distributors often don’t keep on hand
  • Paired-quote support we’ll list compatible detector heads alongside the housing
  • Guidance on rooftop and outdoor install hardware and sampling-tube options
  • Fast turnaround for projects already behind on weatherproof duct detection work
  • Practical advice on when the DNRW is right vs. a standard indoor DNR housing
1. When is a watertight housing like the DNRW actually required?
When the duct detection point sits outdoors, on a roof, in a wash-down kitchen, or anywhere condensation or direct moisture could reach a standard indoor housing, the DNRW's watertight build becomes important.
2. Is a compatible detector head included with the DNRW?
No, the DNRW is a housing only; the intelligent photoelectric detector head must be ordered separately to match the host fire alarm platform.
3. Does the DNRW include any relay outputs for fan shutdown?
No, The DNRW is a non-relay housing; if you need relay-driven fan or damper control, pair it with a separate addressable relay module on the panel side.
4. Does the watertight rating protect the sampling tubes as well?
The housing protects the detector head and sensing chamber; sampling tubes should still be selected and sealed per the manufacturer's outdoor-install guidance.
5. Can I retrofit a DNRW onto a duct currently running a standard DNR housing?
Often yes, with appropriate hardware and a compatible head, many DNR-based installs can be upgraded to DNRW for better environmental protection.
6. Is the DNRW certified for food-service kitchen exhaust ducts?
It is commonly specified for foodservice supply/return ducts, but grease-exhaust applications are governed by different standards; always confirm with the AHJ and current NFPA requirements.
7. How does airflow performance compare between DNR and DNRW housings?
Both are engineered to the same low-flow sensing family; the primary difference is the DNRW's watertight enclosure sensing performance remains consistent when the correct head is used.
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