heater [heaters](device that produces and radiates heat) noun [UK: ˈhiː.tə(r)] [US: ˈhiː.tər]
malhejtilo, klimatizilo noun
air conditioner [air conditioners](a machine that is used to control temperature and humidity in an enclosed space) noun [UK: eə(r) kən.ˈdɪ.ʃə.nə(r)] [US: ˈer kən.ˈdɪ.ʃə.nər]