Because of the heat waves and the fires in the last several years, we decided to have air conditioning installed and at the same time replace our 30 year old furnace. After receiving estimates and presentations from 4 companies we decided to go with A-1 Guaranteed. The presentation was very professional and the proposal quite competitive. Every question was answered and all of my requests were, in fact, granted. Installation was done in a day by a very skilled crew of technicians. The new system and its operation was thoroughly explained to me and it works perfectly and, in fact, we have saved tremendously in PG&E costs during the first month of operation. The testing and the permitting went smoothly and without a hitch. The whole experience has been stress free and, in fact, quite informative and enjoyable.