Skip to footer Williamson's Heating and Cooling Menu Main Content SERVICE We service all makes and models of residential and commercial A/C and heating equipment. We offer emergency service, and our techs can … Read more... about Service NEW INSTALLATIONS We are air conditioning and heating problem solvers. From a fresh set of plans, to complete upgrades we can handle all of your commercial … Read more... about New Installations FINANCING Williamson’s Heating & Cooling has recently updated it’s financing options to enable even more customers to take advantage of the latest energy saving HVAC systems interest free for up to 20 months. Contact us Contact us to book an appointment for an estimate or a service call. Contact Us Today! What our customers say about us. These guys are fabulous. Friendly and personable combined with a very high commitment to excellence in every aspect of their work. Brian M. Review us on Google Review us on Yelp! DUCTLESS MINI-SPLIT SYSTEMS Whether you have a single uncomfortable room, you’re renovating your entire house, or you’re building a home from scratch, Mitsubishi Electric has a Zoned Comfort Solution® that fits your unique needs. Because Dustless Mini-Split systems focus on individual … See the gallery about Ductless Mini-Split Systems RESIDENTIAL INSTALLS We are a full service Heating and cooling contractor, and we can handle your residential jobs of any size. New construction, retrofits, complete equipment replacement, upgrades, or anything you may need to keep your home … See the gallery about Residential Installs COMMERCIAL INSTALLS We are a full service commercial A/C & heat specialist. We can handle LEED certified systems, Medium and low temp refrigeration, Walk-in and reach-in restaurant equipment, Package and split systems, and we are certified on the Mitsubishi City Multi systems. … See The gallery about Commercial Installs Footer ABOUT US We have been proudly serving Tucson and surrounding areas since 1991! Click here to learn more about us. We are Licensed, Bonded and Insured License Number: ROC 171621 K-39 520-886-3229 LOCATIONS Tucson: (520) 886-3229 Oro Valley / Marana / Saddle Brooke: (520) 790-4787 Vail / Rita Ranch / Green Valley: (520) 571-6007 Mailing Address Williamson’s Heating & Cooling 2110 South Alvernon Way Tucson, AZ 85711 COPYRIGHT © 2021 WILLIAMSON'S HEATING AND COOLING · LOG IN