I own a three story, two family house. I decided to rezone my heating system to make it more efficient. The rezoning involved dividing the house into 4 separate zones for heating purposes. Aladding used an innovative approach for controlling the zones, i.e., the heating zones are controlled by radio controlled thermostats. This eliminated the need to hard wire the thermostats, and saved significant money. I was very pleased with the job Aladdin did. My sense is that Aladdin's prices are somewhat on the high side. But offsetting their price...