kütmine tähendus null.

furnace [furnaces]▼◼◼◼noun
[UK: ˈfɜː.nɪs] [US: ˈfɝː.nəs]

heating [heatings]▼◼◻◻noun
[UK: ˈhiːt.ɪŋ] [US: ˈhiːt.ɪŋ]