What a wonderfully educated air conditioning technician!? David works super hard! Now this is small business at its best. He came to my mother's home to fix her air conditioning and he really knows his trade. The only downfall is that he works alone and sometimes works in areas where he does not get cell phone coverage; hence, he is sometimes difficult to contact. Anyone who promotes saving energy gets an A+ in my book. Even I, a sustainability guru, learned energy conservation tips from him. Try him out so he can create some more jobs in Arizona by hiring a team of technicians and a secretary to make sure he doesn't overbook. SUPPORT LOCAL BIZ! =]