What Are the Specifications of the USI Combo Smoke, Fire, and Carbon Monoxide Alarm?
This 3-in-1 alarm is designed to keep your home safe from the three major indoor threats, smoke, fire, and carbon monoxide. With advanced multi-criteria optical sensors and electrochemical CO detection, it offers fast, accurate warnings. The device is hardwired with a sealed 10-year lithium battery backup, ensuring continuous protection even during power outages. It's ideal for use in bedrooms, hallways, and every level of your home.
Key Areas Covered:
Model Number: USI/SMCO/HW10YR/P
Product Overview: 3-in-1 hardwired combo alarm with voice alerts, Smart Silence, and multi-room interconnect capabilities.
Specifications
Features & Benefits
Installation Requirements
FAQs
Usage & Tips
Specifications:
Power Source: Hardwired (120V AC) with built-in 10-year lithium battery backup
Operating Temperature: 40°F to 100°F (4.4°C to 37.8°C)
Humidity Range: 10% to 95% RH, non-condensing
Dimensions: 6.1 in (diameter) x 1.6 in (height)
Voltage: 120V AC
Audible Alarm: ≥85 dB at 10 ft
Color Temperature: Not applicable
Warranty: 10 years (from date of purchase)
Rated Life: 10 years
Mount Type: Ceiling or wall mount
Safety Rating: UL 217 & UL 2034 Compliant
Features & Benefits:
Voice alerts with “Fire!” and “Carbon Monoxide!” in English and French
Multi-criteria optical smoke detection
Electrochemical CO detection with timed sensitivity response
Interconnectable with up to 18 units (12 combo/smoke alarms max)
Smart Silence feature for nuisance alarms
LED indicators (green for power, yellow for faults, red for alarms)
Alarm memory feature to recall past alarms
Single test/silence button for easy maintenance
Installation Requirements:
UL Listed junction box
120V AC non-switched circuit
Wire nuts for connections
Mounting screws and plastic anchors (included)
Do not use in extreme environments (e.g., garages, damp areas)
FAQs
Q: What does the alarm sound like?
A: Smoke: 3 long beeps + voice alert. CO: 4 quick beeps + voice alert.
Q: Can it be used in kitchens or bathrooms?
A: No. Install at least 10 ft away from such areas to avoid false alarms.
Q: How long does the battery last?
A: 10 years. It's sealed inside and doesn’t require replacement.
Q: Can I install this in a mobile home?
A: Yes, with appropriate positioning per insulation quality.
Usage & Tips
Test weekly using the TEST/SILENCE button.
Clean monthly with a soft brush attachment (no sprays or solvents).
Do not paint the device.
Press the TEST button for over 1 second to activate the test mode.
Stand at least 2.5 feet away during testing.