Professional Smoke & CO Detector Installation
Smoke and carbon monoxide (CO) detectors are among the most important safety devices in your home. They provide early warning of fires and dangerous gas leaks, giving your family critical time to escape. Yet many homes still rely on outdated battery detectors from the 1980s or have gaps in coverage that put them at risk.
At Lone Star Electric, we install modern, code-compliant smoke and CO detection systems tailored to your home's layout. Whether you're replacing aging battery detectors with a hardwired interconnected system or upgrading to combo units that detect both smoke and CO, our licensed electricians ensure proper placement, professional installation, and full code compliance. We serve Plano, Frisco, McKinney, Allen, Richardson, and Garland with expert guidance on life-safety protection.
Smoke & CO Detector Options
Installation Types
- Hardwired Interconnected
Connected via low-voltage wiring so all alarms sound together. Powered by home's electrical system with battery backup. Best safety option and code standard for new construction.
- Wireless Interconnected
Battery-powered detectors that communicate wirelessly. Good retrofit option for existing homes where hardwiring isn't practical. Requires battery maintenance.
- Battery-Only (Basic)
Standalone battery detectors with no interconnection. Cheapest option but only the detector in that room will alarm. Not recommended for whole-home protection.
Detection Technologies
- Photoelectric
Better for detecting slow, smoky fires from smoldering materials. Produces fewer false alarms from cooking. Ideal for kitchens and living areas.
- Ionization
Better for detecting fast, flaming fires. More sensitive to flames from paper or wood. Good for bedrooms and hallways.
- Dual-Sensor (Combination)
Has both photoelectric and ionization sensors. Detects all fire types. Most modern systems are dual-sensor for comprehensive protection.
Smoke vs. Smoke/CO Combination Units
Smoke Only
- ✓Lower cost per unit
- ✓Dedicated smoke detection
- ✓Requires separate CO detectors
Smoke & CO Combo
- ✓One unit for two hazards
- ✓Cleaner installation (fewer devices)
- ✓Slightly higher cost per unit
Proper Placement & Code Requirements
NFPA 72 (National Fire Alarm Code) and Texas Property Code 92.255 specify exact placement requirements. Improper placement leaves blind spots that compromise protection. We follow all guidelines to ensure comprehensive coverage.
Smoke Detector Placement
- •One per bedroom
Inside each sleeping area
- •One per level
At least one in central hallway on each floor
- •Kitchen location
Photoelectric detector 10 feet from cooktop (to minimize false alarms)
- •Ceiling mount preferred
4–12 inches from ceiling. Wall mount: 4–12 inches from top of wall
- •Avoid blocked areas
Keep away from ceiling fans, vents, and closed spaces where smoke won't reach
CO Detector Placement
- •One per sleeping area
In or within 15 feet of each bedroom
- •Living areas
Central living room or common area
- •Near gas appliances
In bedrooms if furnace/heater is in or near the home
- •Wall or pedestal mount
Typically 5–6 feet from floor (breathing zone)
- •Never in kitchens
Gas stoves can trigger false alarms. Install in living areas instead
Example: Typical Plano Home Layout
A typical 2-story Plano home (3 bed, 2.5 bath) would need:
- •3 hardwired smoke detectors (master & guest bedrooms, hallway)
- •1 smoke detector upstairs hallway
- •2 CO detectors (master bedroom area, living room)
- •All interconnected with battery backup
Smoke & CO Detector Installation Pricing
Our pricing includes professional-grade detectors, labor, wiring, and interconnection where applicable. All detectors include battery backup and are code-compliant.
| Service | Cost | Description |
|---|---|---|
| Battery Smoke Detector Swap | $85–$125 each | Replace old battery detectors with new ones (no electrical work) |
| Hardwired Smoke Detector Installation | $150–$250 per unit | Wire, mount, and test one hardwired smoke detector with battery backup |
| Hardwired CO Detector Installation | $175–$275 per unit | Wire, mount, and test one hardwired CO detector with battery backup |
| Combo Smoke/CO Detector Installation | $175–$300 per unit | Wire, mount, and test one hardwired smoke & CO combo detector |
| Whole-House Hardwired System | $500–$1,200 | Complete hardwired interconnected system for typical 2–3 story home (4–6 detectors), includes placement assessment and code compliance |
| Wireless Interconnected System | $250–$500 | Battery-powered wireless detectors for retrofit homes (typically 4 units), no electrical work required |
| Nest Protect Installation | $200–$350 per unit | Install smart WiFi-enabled detector with phone notifications and voice alerts |
* All hardwired systems include low-voltage interconnecting wire, proper mounting hardware, testing, and battery backup. Whole-house systems include a free placement assessment based on your home's layout and NFPA 72 requirements.
Fire Code & Safety Standards
NFPA 72 — Fire Alarm Code
The National Fire Protection Association (NFPA) 72 code specifies smoke and CO detector placement, type selection, and testing requirements.
- •Interconnected systems — All detectors must sound together
- •Monthly testing — Test buttons on all detectors
- •Battery replacement — Every 6 months or semi-annually
- •Detector replacement — Every 8–10 years
NEC 760 — Fire Alarm Circuits
The National Electrical Code (NEC) Article 760 covers installation and wiring of fire alarm systems and smoke/CO detectors.
- •Proper wiring gauge — 18 AWG typically used for interconnecting circuits
- •Low-voltage protection — Separate from power circuits
- •Dedicated breaker — Hardwired systems need separate circuit protection
- •Battery backup required — System continues to function during power outages
Texas Property Code 92.255 (Rental Requirements)
While Texas law for rentals requires smoke detectors, there's no statewide CO requirement (though many municipalities have adopted local CO laws). Homeowners can't be mandated to install detectors by law but should absolutely have them for family safety. Many Plano and Richardson homes built in the 1980s–90s still rely on old battery detectors. We recommend upgrading to modern hardwired interconnected systems for peace of mind and code compliance if your home is ever sold.
Upgrading Smoke Detectors in Older Plano & DFW Homes
Why Upgrade From Battery-Only Systems?
- ✓Never dead batteries — Powered by your home's electrical system
- ✓Whole-home alerting — All detectors sound when one detects smoke
- ✓Reduced false alarms — Modern dual-sensor technology is more accurate
- ✓Modern CO protection — Many older homes have no CO detectors
- ✓Better resale value — Modern systems increase home appeal
Common Issues in 1980s–90s Homes
- •Battery detectors from original construction (10+ years old)
- •Low coverage (1–2 detectors for entire house instead of proper placement)
- •No carbon monoxide detectors at all
- •Wrong detector type (ionization only, poor for smoldering fires)
- •No interconnection (one detector doesn't alert others)
Why Choose Lone Star Electric for Life-Safety Protection
NFPA 72 & NEC 760
Every placement, detector type, and interconnection meets NFPA and Texas electrical code. Your family is protected to the highest standard.
Professional Layout Planning
We assess your home's layout and recommend proper placement, detector types, and interconnection to close gaps in coverage.
Kidde, First Alert, Nest
We install industry-leading detectors with excellent warranties, reliability records, and customer support.