1. With unvented space heaters, their age is a factor. 2. :: Unvented systems are entirely different and typically deal with high pressure. 3. Besides, any unvented roof area is a collector or moisture and attending mold. 4. They worked in unvented rooms, they wore smocks that they laundered at home. 5. This may occur in unvented heating systems, where thermal expansion increases the pressure. 6. The situation gets even worse, Port said, when the heat source is unvented . 7. A . There's nothing like an unvented attic to cause mildew to grow. 8. Someone installed a half bath under the stairs, which works fine except it is unvented . 9. That considered, an unvented attic can be 10 to 20 degrees warmer than outside in winter. 10. Ice dams occur on the edges of the roofs of uninsulated and underinsulated houses, and unvented attics.
