Many years ago I purchased an old university bus then transformed it into a mobile home.
I initially had a window AC on the bus to keep it cool but I could only use the window AC when I was by power source.
When I heard about solar window AC units plus other kinds of solar Heating, Ventilation & A/C units I suddenly went to a nearby cooling plus heating company to purchase a solar window AC… Now I could use this cooling system component to keep our bus cool all day. As the years rolled by I decided I wanted to build a central AC for our bus so that both the front plus back could be the same temps. I did some research on zone controlled Heating, Ventilation & A/C plus figured it would labor in a university bus with simply a central AC that had air ducts on the front plus back. I rented a small garage that I used as my Heating, Ventilation & A/C shop while I built the central AC for our bus. I was fortunate to find someone who wanted to purchase our window AC for more than I originally bought it from the cooling plus heating business. I use the cash from the solar window AC to purchase heating plus cooling components for our new central My last step in building the cooling system unit was to purchase air filters plus put them inside the air ducts of the central AC. These air filters will ensure that our bus has fine indoor air pollen levels plus that our SEER rating was amazing.