Rheem
Rheem D4120 Duct Smoke Detector - Photoelectric 4WIR
Rheem D4120 Duct Smoke Detector - Photoelectric 4WIR
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Rheem D4120 — Duct Smoke Detector - Photoelectric 4WIR.
Photoelectric 4-wire Versatile mounting options: square or rectangular configuration Air velocity rating from 100 ft/min to 4,000 ft/min (0.5 m/s to 20.32 • m/sec) Broad ranges for operating temperature (–4°F to 158°F) and humidity (0% to 95% non-condensing) Patented sampling tube installs from front or back of the detector with no tools required Plug-in sensor offers superb false alarm immunity and the latest
- Manufacturer part number: D4120
- Brand: Rheem
- Category: Duct Smoke Detectors
- Sold for HVAC / plumbing service replacement — verify OEM fitment before ordering
Frequently asked questions
What is D4120?
Rheem D4120 is sold as DUCT SMOKE DETECTOR - PHOTOELECTRIC 4WIR. Confirm fitment against your equipment model and the OEM part number before ordering.
Is this an OEM part number?
The manufacturer part number is D4120. Our internal warehouse SKU uses a TL- prefix for inventory tracking.
How should I verify compatibility?
Match the full OEM part number on the old component or your unit's parts list. When in doubt, provide the equipment model number to your counter person.
Do you include installation instructions?
Follow the OEM service literature for your equipment. Disconnect power and recover refrigerant or isolate water as required before replacing parts.
What is your return policy on parts?
Unopened, unused parts in original packaging may be returned per store policy. Electrical and special-order items may be final sale — check the product page notes.
Is a GTIN/UPC available?
When a manufacturer GTIN is known it is listed in the barcode field. Some HVAC OEM parts ship without a retail UPC; brand and MPN still identify the product.
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