A home improvement contract does not include an oral or written agreement between a contractor and an owner for the installation of which of the following?

A home improvement contract typically does not include an oral or written agreement for the installation of certain small-scale safety devices, such as smoke detectors, heat detectors, and carbon monoxide detectors. This is because these devices are generally considered minor installations that do not significantly alter the structure or systems of a home.

The reasoning behind this is that home improvement contracts usually cover more extensive renovations or improvements that fundamentally change the property, such as additions, roofing, or installation of major systems (like plumbing and electrical work). The installation of each of these types of detectors falls more into the category of regular maintenance or minor upgrades rather than a formal home improvement project.

Thus, since all listed items—smoke detectors, heat detectors, and carbon monoxide detectors—are typically not included within the scope of a home improvement contract, the correct answer reflects that none of these installations would necessitate a formal agreement under such contracts.