Water heater having a down fired combustion assembly
US9429337B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 2013 |
| Grant date | Aug 30, 2016 |
| Priority date | — |
| Expiry date | Nov 27, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24H9/1836
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
Disclosed is a water heater that has a water storage tank, a first pass flue tube extending from a top of the water storage tank to a bottom of the water storage tank, a down-fired burner assembly positioned to direct combustion gases into the first pass flue tube, a plurality of second pass flue tubes extending from the bottom of the water storage tank to a top of the water storage tank, and an expansion chamber positioned below the bottom of the water storage tank. The expansion chamber receives the combustion gases from the first pass flue tube and delivers the combustion gases to the second pass flue tubes. The water heater operates with a non-positive vent static pressure and with a vent gas temperature that avoids or reduces excessive condensate production in an exhaust vent connected to receive combustion gases from the water heater.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.