To turn the heat used a string of air between the metal roofing gravity – roofing and sheathing sucking the air with a such as computer miniature fan 12V or 5V.
Kugeuka joto kutumika kamba ya hewa kati ya mvuto tak chuma – tak na sheathing sucking hewa kwa vile kama kompyuta miniatyr shabiki 12V au 5V .