ヒートポンプ式ルームエアコンの性能向上は著しく，寒冷地区でのエアコンの需要が増加傾向にある．しかし暖房運転時に外気温度の低下による能力の減少，除霜時の快適性等で改善の余地が残されている．当社はこの問題の解決を図るため，灯油燃焼ガスによる冷媒加熱式ルームエアコンのバーナについて，制御範囲が業界トップクラスの30～100％まで安定燃焼可能なバーナを開発した．

Heat pump room air conditioners have improved remarkably, and the demand for air coditioners is increasing in cold areas. However, some problems still remain, such as a decline in heating performance due to changes of outside temperature and inadequate comfort during defrosting. In order to solve these problems. MHI has recently developed a burner of air conditioners which use kerosene. whose burning range has a flame stability of 30 to 100%, the best in the industry.