New homes are being built with both hardwired smoke detectors and carbon monoxide detectors in most jurisdictions in the US. Most, if not all counties in Colorado, now require both in new homes being constructed. When existing homes have additions or electrical modifications, most building inspectors will require that CO2 detectors be added in order to enhance occupant safety. Typically, it is now required that when homes are sold these units are to be installed within 15 feet of any bedroom or sleeping area. In a recent home inspection in Castle Rock Colorado, this unit was photographed. This is a typical CO2 detector that can be purchased from a home improvement store and plugged into any wall outlet in a home. This is a simple and inexpensive way to update a home to comply with current building codes and make a home safer for the occupants.