High efficiency gas-fired water heater
US9004018B2 · kind B2 · utility
2Cited by
38References
42Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2010 |
| Grant date | Apr 14, 2015 |
| Priority date | — |
| Expiry date | Feb 12, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B30/00
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
The efficiencies of illustrative embodiments of vertical center flue type fuel-fired base water heaters are improved by installing in the water heaters variously configured tubular condensing type secondary heat exchangers of smaller diameters than the associated center flues. The efficiency increases are achieved with components and manufacturing processes similar to those utilized in the base water heaters and secondary heat exchanger materials similar to those in the tank portions of the base water heaters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.