US 12,130,053 B2
Hybrid tank and tankless water heating system
Jason Oliver, Peachtree City, GA (US); Michael Scott Knoblett, Peachtree City, GA (US); Floris van Dijk BsC., Doesburg (NL); and Jason William Siler, Sharpsburg, GA (US)
Assigned to Rinnai America Corporation, Peachtree City, GA (US)
Filed by Rinnai America Corporation, Peachtree City, GA (US)
Filed on Aug. 22, 2022, as Appl. No. 17/821,301.
Application 17/821,301 is a continuation of application No. 17/162,851, filed on Jan. 29, 2021, granted, now 11,421,915.
Claims priority of provisional application 62/968,842, filed on Jan. 31, 2020.
Prior Publication US 2022/0397303 A1, Dec. 15, 2022
Int. Cl. F24H 9/00 (2022.01); F23L 15/04 (2006.01); F24H 1/20 (2022.01); F24H 9/20 (2022.01); F24H 15/174 (2022.01); F24H 15/219 (2022.01); F24H 15/223 (2022.01); F24H 15/365 (2022.01)
CPC F24H 9/0084 (2013.01) [F23L 15/04 (2013.01); F24H 1/205 (2013.01); F24H 9/2035 (2013.01); F24H 15/174 (2022.01); F24H 15/219 (2022.01); F24H 15/223 (2022.01); F24H 15/365 (2022.01)] 5 Claims
OG exemplary drawing
 
1. A hybrid tank and tankless water heating system, comprising:
a tankless water heater configured to produce hot water;
a hot water storage tank in fluid communication with the tankless water heater and configured to receive the hot water produced by the tankless water heater; and
a controller configured to control a fuel consumption rate of one or more burners of the tankless water heater though a plurality of burner stages as a temperature of hot water stored in the hot water storage tank increases, wherein each of the burner stages operates the one or more burners at a different fuel consumption rate range, and wherein the fuel consumption rate range for each of the plurality of burner stages is maintained within 5-10% of the maximum fuel consumption rate for the fuel consumption rate range.