The answer to 'how much is carbon monoxide detector upgrade' is that the cost can vary significantly depending on several factors. Upgrading an existing carbon monoxide (CO) detector typically ranges from $50 to $200 for a basic model, with more advanced features and smart home integration costing up to $300 or more.
The main factors that influence the cost include the type of detector (battery-powered vs. hardwired), the features (basic vs. smart), the brand and quality, and whether professional installation is required. Additionally, the complexity of the upgrade, such as running new electrical wiring, can also impact the final price. It's essential to get local quotes from licensed electricians or HVAC contractors to accurately estimate the cost for your specific home and needs.