Furnace vent with water-permeable inner pipe
US9103560B2 · kind B2 · utility
3Cited by
10References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 1, 2011 |
| Grant date | Aug 11, 2015 |
| Priority date | — |
| Expiry date | Jul 24, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24D2220/06
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A vent system for improving the efficiency and/or reducing emissions of a combustion device is disclosed. The vent system may include an outer pipe and an inner pipe having a longitudinal section that is permeable to water or water vapor and is longitudinally disposed within the outer pipe. The inner pipe defines a first passageway and the outer and inner pipes define a second passageway therebetween. As the moisture and/or heat are transferred from the flue gas to the intake air through the longitudinal section of the inner pipe, the efficiency of the furnace may be improved and the NOx emission of the furnace may be reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.