 ይህ መጠን እነዚህን ማሞቂያዎች 40 / 1 / 1 በፊት መጠናቀቅ መኖሪያ ውስጥ የተጫኑ መሆኑን ጥምር ሁኔታ ወደ 1977 ወደ% ጨምሯል እና መገልገያዎች ዓመት ኛ ወደ 31 የቅርብ ጊዜ 2 ታህሳስ ላይ ተሸክመው ካሉት የሚከተሉት ነው ማግኛ መኖሪያ.
This rate is increased to 40% on the double condition that these boilers are installed in a dwelling completed before 1/1/1977 and that their installations are carried out no later than December 31 of the 2 nd year following that of the acquisition of housing.