Is modern air duct entirely necessary?

I was dropping off our sons at the daycare when I met our friend Raj in the parking lot, however since he does not have any children, I was curious why he was at the daycare, but he told me that he was there to take care of duct cleaning plus control component installation the daycare had suggested when they called the local business. He was at the daycare much earlier before the parents started arriving. He had, but, stayed a bit longer since the administration wanted to think ways to improve indoor air pollen levels because there was an increase in the number of children at the daycare. He provided them various air quality systems best suited for such establishments, however i was also looking into extra heat plus A/C products, plus from the options, I had narrowed down to, he commanded me to settle for the heat pump. I was afraid they would have to kneel modern air duct, but Raj assured me that it was not constantly the case. If the air ducts are in good condition, they do duct sealing to insulate them, after his constructive insight, I set off to buy a modern air filter to keep the air purification system in good condition because it would be various months until the modern installation. I had thought of purchasing a washable filter but then thought of buying it when the modern system would be up plus running. I had also ordered an UV air purifier, but I was slowly wondering if it was the right thing to do. I was saving every penny for the modern installation, plus spending currency on something not mandatory felt prefer overspending. I instantly went online plus canceled the purchase.

air conditioning repair