What makes Charter Oak the right choice? We bring decades of experience to the table on every job. We know how to fix your products the first time. Charter Oak Mechanical brings quality products, service, and experience to the Greater Hartford HVAC industry. We can service your home or business anytime and we will do things the way we'd want them done if we were you. No more do you have to lower your expectations on quality and service. We can perform services on the fly and we can provide service plans that will take the worry out of servicing your system.