Hassler was great to work with. We got a heat pump installed and it works perfectly for heating and cooling. They were very responsive and completed the project on schedule. The office staff is also v

We have a heat pump with heating & cooling capabilities which was installed a couple of years ago by Hassler. They did a wonderful job. During a recent heat wave in Oakland, the ac would shut off afte

Great guys to work with as we took a while to decide the right solution. Max gave us many options, and once we had the right one the team started. Malik and the guys were great. Efficient, courteous,