All the needed components like the programmable control machine were essentially supplied by the local cooling and heating business
My father actually works as an industrial chemist. His work is pretty much to mix chemicals to make all sorts of agents such as fertilizers for farmlands, medicine, or aerosols. These chemicals are pretty dangerous especially when inhaled. He works on a contract basis and the last company that he worked for, had a ductless mini split machine however had neglected it severely. As he mixed the chemicals he could truly feel the chemicals settle on the surfaces of the lab however he had on gloves and a mask. The management had not performed even a single Heating, Ventilation, and A/C maintenance check since it was installed a couple of years ago. My father, being experienced, proposed to the directors to have the heating and cooling machine assessed by an a/c rep so that it checked optimal levels. Cooling professionals from the residence comfort company came to the lab the following afternoon and were horrified by the condition of the commercial a/c machine. The quality air conditioner filter was seriously filthy with all sorts of contaminants including relatively harmful chemical residue that everyone at the plant was definitely inhaling in. No wonder there had been a good amount of cases where employees had contracted respiratory illnesses! Other components of the machine were worn out from years of neglect. The HVAC workers advocated replacing the machine with a quality Heating, Ventilation, and A/C system, a hybrid Heating, Ventilation, and A/C system. They would work to embed a smart Heating, Ventilation, and A/C to improve its efficiency. All the needed components like the programmable control machine were essentially supplied by the local cooling and heating business. The management of the chemical plant was pretty grateful to my father for proving the importance of having an a/c company assess a unit frequently.