I lived in rentals for a long time before I started building our own house, then as a leaseholder, I was keener than I was when I lived with our parents, my experience with heating plus cooling was never pleasant in all the 3 rentals I stayed in, but the first house I lived in had a faulty central gas furnace, the seventh house lacked proper service. When I moved to the last house before I moved into mine, the ductwork ended up being in a bad state. The struggle the building owner had made me think about installing a radiant furnace in our house. Many times the building owners had to engage more than one air conditioner equipment workman to carry out the Heating & A/C repair or some repair work. And being old systems, the seer ratings were well below the proposed 13. When I hired our Heating & A/C corporation, our main focus was to have quality Heating & A/C ductless units in the house plus avoid ductwork related expenses; So he ensured that all our Heating & A/C equipment was current plus energy-efficient. That would include any portable space furnace appliance I buy. Shopping for new Heating & A/C equipment is easier now than before. A good Heating & A/C corporation salesman will enlighten you on the best appliances for your premises, plus also offer an air conditioner repair plan, with every air conditioner installation, but i lived in areas that had drastic weather variations despite the fact that I realized I am more tolerant of colder weather than tepid seasons. So I have invested in a reliable plus efficient cooling system but generally, it pays to have proper air quality systems in the house.