Stay Comfortable - Think Pink. SG Mechanical is a locally owned and operated HVAC company out of Surprise, Arizona specializing in air conditioning, heating, duct design and A/C repair for both residential and commercial customers throughout the Phoenix valley. The owners have a combined 30+ years of experience in the HVAC Industry. Shane (Showtime) and Brandon (Guinea) met while working for a local HVAC company. While working together, they discovered a shared entrepreneurial spirit and decided to start their own company. Showtime (S) and Guinea (G) then formed SG Mechanical LLC.