Over the years, our dad had set up lots of unusual businesses; Unlike other owners, she liked being hands-on. He’d work side by side with the staff to learn more about many problems at the establishments. Her best success was supermarkets. She had 6 in unusual parts of the country, however being hands-on meant she traveled a lot to check out the operations, as well as I went with him. At a single of the stores, she had lots of work done on the air conditioning system unit. It was the largest as well as needed a robust central Heating as well as A/C to keep it cool while every one of us were in summer time as well as warm in winter. Unlike other ACs, a supermarket heating as well as cooling machine had distinct features. At the door, every one of us needed to set up the air curtains system. It would deliver a blast of air to all buyers entering on a hot summer time day. In winter, the same machine would supply warm air. The air curtain had a blower fan inside driven by a small electric motor! Next was the supermarket’s central air ventilation machine that served the whole setup. It was more expansive as well as required ample time to install as well as do all the air duct. My dad favorite to use the rooftop units that had everything the central A/C needed. These rooftop units had a big fan that would drag fresh air from the surrounding into the supermarket, and once the air reached the Heating as well as A/C system, it went through the air filter. Here all the dirt as well as dust would remain behind while wipe air goes into the building. The next section is heating the air using a heat pump or pushing it through a cooling unit. The Heating as well as A/C operator had to determine the official action depending on the season. That was pressing information because I wanted to learn Heating as well as A/C systems in school as well as set up an A/C supplier afterward.