GREEN STAR HVAC Contact us if you have any questions about some of our HVAC services. You can also call if you need help with a heating, cooling or air quality issues. We provide free quotes for any new heating or AC equipment installation. Whether you need residential or commercial services, our experienced HVAC specialists are ready to serve you. our service areas included but not limited to Ottawa, Nepean, Orleans, Stittsville, Carp, Arnprior, Barrhaven.