![Hi, I'm going to attempt to replace these Firex smoke detectors myself. can I just buy the most recent model of these and swap them out, leaving all the old wires? Or Hi, I'm going to attempt to replace these Firex smoke detectors myself. can I just buy the most recent model of these and swap them out, leaving all the old wires? Or](https://preview.redd.it/hi-im-going-to-attempt-to-replace-these-firex-smoke-v0-7nce6mtqp4ba1.jpg?width=640&crop=smart&auto=webp&s=1340cfc628de58869043d20931c649b82fa77299)
Hi, I'm going to attempt to replace these Firex smoke detectors myself. can I just buy the most recent model of these and swap them out, leaving all the old wires? Or
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Kidde I4618AC Alarm Hardwire Smoke Detector with 9V Backup and Front Load Battery Door | Model i4618, White - Kiddie Ka F Adaptor - Amazon.com
![Kidde Firex Smoke Detector, Hardwired with Battery Backup & Front-Load Battery Door, Smoke Alarm 21029877 - The Home Depot Kidde Firex Smoke Detector, Hardwired with Battery Backup & Front-Load Battery Door, Smoke Alarm 21029877 - The Home Depot](https://images.thdstatic.com/productImages/d7d550a0-5988-435d-8a62-382b5f3444e8/svn/kidde-hardwired-smoke-detectors-21029877-64_1000.jpg)
Kidde Firex Smoke Detector, Hardwired with Battery Backup & Front-Load Battery Door, Smoke Alarm 21029877 - The Home Depot
![Kidde 21007581 Firex Hardwired Smoke Alarm 120/9 Volt Battery Back-Up Smoke Detector Ionization Sensor Kidde 21007581 Firex Hardwired Smoke Alarm 120/9 Volt Battery Back-Up Smoke Detector Ionization Sensor](https://www.scottelectricusa.com/img/products/300x300/8820.jpg)
Kidde 21007581 Firex Hardwired Smoke Alarm 120/9 Volt Battery Back-Up Smoke Detector Ionization Sensor
![Kidde I4618AC Alarm Hardwire Smoke Detector with 9V Backup and Front Load Battery Door | Model i4618, White - Kiddie Ka F Adaptor - Amazon.com Kidde I4618AC Alarm Hardwire Smoke Detector with 9V Backup and Front Load Battery Door | Model i4618, White - Kiddie Ka F Adaptor - Amazon.com](https://m.media-amazon.com/images/I/61NhWaKpE8L.jpg)
Kidde I4618AC Alarm Hardwire Smoke Detector with 9V Backup and Front Load Battery Door | Model i4618, White - Kiddie Ka F Adaptor - Amazon.com
![Kidde Firex Hardwired Combination Smoke and Carbon Monoxide Detector with Adapters and Voice Alarm 21029718 - The Home Depot Kidde Firex Hardwired Combination Smoke and Carbon Monoxide Detector with Adapters and Voice Alarm 21029718 - The Home Depot](https://images.thdstatic.com/productImages/a0102341-0cb5-4141-803e-b9b2f395b6f2/svn/kidde-smoke-and-carbon-monoxide-detectors-21029718-64_1000.jpg)
Kidde Firex Hardwired Combination Smoke and Carbon Monoxide Detector with Adapters and Voice Alarm 21029718 - The Home Depot
![Kidde FireX AC Wire-in Combination Carbon Monoxide & Photoelectric Smoke Alarm | 900-0213 | Bulbs.com Kidde FireX AC Wire-in Combination Carbon Monoxide & Photoelectric Smoke Alarm | 900-0213 | Bulbs.com](https://www.bulbs.com/Images/productmed/1/33692.jpg)
Kidde FireX AC Wire-in Combination Carbon Monoxide & Photoelectric Smoke Alarm | 900-0213 | Bulbs.com
![Kidde Firex Hardwired Smoke Detector with Photoelectric Sensor and 9-Volt Battery Backup 21029883 - The Home Depot Kidde Firex Hardwired Smoke Detector with Photoelectric Sensor and 9-Volt Battery Backup 21029883 - The Home Depot](https://images.thdstatic.com/productImages/f33c3ab9-7144-4088-9633-9a40faf0a816/svn/kidde-hardwired-smoke-detectors-21029883-64_1000.jpg)
Kidde Firex Hardwired Smoke Detector with Photoelectric Sensor and 9-Volt Battery Backup 21029883 - The Home Depot
![Kidde Firex Battery Operated Kitchen Smoke Detector with Photoelectric Sensor 21030007 - The Home Depot Kidde Firex Battery Operated Kitchen Smoke Detector with Photoelectric Sensor 21030007 - The Home Depot](https://images.thdstatic.com/productImages/ad7068dc-5f96-46ed-b54f-7d640c4d1f74/svn/kidde-battery-smoke-detectors-21030007-64_1000.jpg)
Kidde Firex Battery Operated Kitchen Smoke Detector with Photoelectric Sensor 21030007 - The Home Depot
![Kidde Firex Smoke & Carbon Monoxide Detector, Hardwired with nine-V Battery Backup & Voice Alarm, 3-Pack 21029901 - The Home Depot Kidde Firex Smoke & Carbon Monoxide Detector, Hardwired with nine-V Battery Backup & Voice Alarm, 3-Pack 21029901 - The Home Depot](https://images.thdstatic.com/productImages/35a896fc-6abc-480b-b63e-fc8bac14cd80/svn/kidde-smoke-and-carbon-monoxide-detectors-21029901-c3_600.jpg)
Kidde Firex Smoke & Carbon Monoxide Detector, Hardwired with nine-V Battery Backup & Voice Alarm, 3-Pack 21029901 - The Home Depot
![Kidde Firex Smoke Detector, Hardwired with 9-Volt Battery Backup & Front Load Battery Door, Adapters Included, Smoke Alarm 21029886 - The Home Depot Kidde Firex Smoke Detector, Hardwired with 9-Volt Battery Backup & Front Load Battery Door, Adapters Included, Smoke Alarm 21029886 - The Home Depot](https://images.thdstatic.com/productImages/65a413c8-d974-400b-9d7a-9ad56bd27b6f/svn/kidde-hardwired-smoke-detectors-21029886-64_1000.jpg)