My colleagues & I were assigned to work at a nearby mall! Our in-store promotion was to take 1 month, however it was split short because a colleague collapsed due to the terrible air conditioning install previously done there. The floor manager was summoned to explain the status of the Heating, Ventilation, & A/C systems, however the report was not instantly available; His observation was, however, that the current Heating, Ventilation, & A/C systems recently installed were not adequately diagnosed for efficiency. That afternoon, the trader both of us were promoting his products in-store stopped work instantly & ordered for an impromptu air conditioning service to be done. The manager had to contact the Heating, Ventilation, & A/C repairman who made the upgrades to do the necessary repairs, however further investigations revealed that they installed a residential Heating, Ventilation, & A/C with low capacity instead of the advocated commercial version. He did not also kneel the Heating, Ventilation, & A/C duct appropriately, so the business was really looking at overpriced HVAC duct cleaning in the future! Clearly, the Heating, Ventilation, & A/C provider had a lot to answer, however first, the priority was to sort the air purification plan so that regular work could resume soonest possible since there was hardly proper ventilation in the mall shops, then despite installing residential appliances at first, the heating & cooling equipment upgraded functioned just fine after performing the necessary tests. Once everything was back in the location, all the people was ecstatic to have reliable central heating doing its work. It brought fantastic change & a weird mood. If they had more rooms to work with, I am sure the zone control would have served them well. Although the mall allowed every trader to install their number one A/C products, they chipped in to assist with energy saving help.