The answer to 'do I need carbon monoxide detector' is yes, it is highly recommended that all homes have a working carbon monoxide (CO) detector installed. Carbon monoxide is an odorless, colorless gas that can be deadly if it builds up in your home. CO detectors are the only way to detect this dangerous gas and alert you to the presence of it.
CO detectors should be installed on every level of your home, near bedrooms, and within 15 feet of each bedroom door. They should be replaced every 5-7 years as the sensors can degrade over time. If your CO detector goes off, immediately evacuate your home and call emergency services.