Smoke and Carbon Monoxide Detector Installation and Testing

My family has lived in this house for several years, and I have recently realized that half of the smoke detectors are outdated, one carbon monoxide detector has stopped chirping altogether, and I am not confident that any of them would actually protect us in a real emergency. I need an experienced technician to come out, evaluate every level of the house, and install a complete set of new smoke detectors and carbon monoxide detectors in the bedrooms, hallways, kitchen, garage, and basement. Some rooms already have wiring in place for hardwired units, while others will need reliable battery-powered models with long-life batteries and tamper-resistant mounts.

Beyond just mounting units on the ceiling, I want every single detector tested and verified once installation is finished, including the interconnected alarm feature so that one triggered unit sounds every alarm in the house at the same time. I would like the technician to walk me through the test results room by room, replace anything that fails, and leave me with a simple maintenance schedule so I know when to change batteries or replace units going forward. Correct placement matters to me just as much as the equipment itself, so detectors should follow the proper distances from kitchens and bathrooms, and carbon monoxide units should sit at the correct height near sleeping areas and any fuel-burning appliances.

What I am looking for:
— Licensed, insured technician with documented smoke and CO detector experience
— Removal of old or expired units and proper disposal
— Installation of new interconnected smoke and carbon monoxide detectors per room
— Full functional testing of every unit with written confirmation
— Placement that follows local fire and building code requirements
— Basic guidance on battery replacement and future maintenance