For more than 7 years, Sun Devil Heating and Cooling has kept clients' homes cool in the summer and comfortable in the winter with fix-it repairs and regular maintenance for heating and cooling systems. When the weather starts to heat up, air-conditioner tune-ups ensure systems run efficiently and effectively. When it starts to cool down, furnace maintenance staves off the entreaties of Old Man Winter, who retired in Arizona last year. And if clients seek to upgrade or replace a unit that's beyond repair, Sun Devil sells and installs new air systems. The HVAC gurus design and install air ducts and vents, vastly improving the quality of air inside the home.