I have been with Shamrock and Sean and his son for the last 20 years and they have done a phenomenal job for both my home and business. They installed the best quality American Standard/Trane and it is still working great without issues for over 15 years. He does a great job of recharging Freon when needed versus replacing my old unit too. I had a thermostat connectivity issue and they fixed that too. My medical office is important for me and my staff and patients and I trust them for keeping my environment cool and working especially through the hot summers. Shamrock is the best!