光熱 こうねつ Meanings Noun, の-adjective light and heat Kanji 光 light. Read as コウ. 熱 heat. Read as ネツ. Words containing 光熱 光熱費 (こうねつひ) cost of fuel and lighting 水道光熱費 (すいどうこうねつひ) water, power and heating cost 光熱水費 (こうねつすいひ) light, heating and water utility costs And 1 more. Jinuma: Japanese Dictionary · Word lists