F24D 5/00
Hot-air central heating systems
Official title: Hot-air central heating systems (district heating systems F24D10/00; central heating systems using heat accumulated in storage masses F24D11/00; air conditioning F24F); Exhaust gas central heating systems
F24D5/00 (Hot-air central heating systems) appears on 505 US grants and 467 published applications in this corpus.
Search patents in F24D- Granted patents
- 505
- Published applications
- 467
- Assignees
- 278
- Inventors
- 1,040
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 6 | 0 |
| 1978 | 8 | 0 |
| 1979 | 6 | 0 |
| 1980 | 8 | 0 |
| 1981 | 16 | 0 |
| 1982 | 7 | 0 |
| 1983 | 14 | 0 |
| 1984 | 10 | 0 |
| 1985 | 22 | 0 |
| 1986 | 9 | 0 |
| 1987 | 12 | 0 |
| 1988 | 10 | 0 |
| 1989 | 10 | 0 |
| 1990 | 12 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 7 | 0 |
| 1994 | 1 | 0 |
| 1995 | 5 | 0 |
| 1996 | 3 | 0 |
| 1997 | 5 | 0 |
| 1998 | 3 | 0 |
| 1999 | 4 | 0 |
| 2000 | 5 | 0 |
| 2001 | 6 | 2 |
| 2002 | 6 | 4 |
| 2003 | 7 | 7 |
| 2004 | 6 | 3 |
| 2005 | 1 | 10 |
| 2006 | 4 | 1 |
| 2007 | 3 | 3 |
| 2008 | 0 | 8 |
| 2009 | 1 | 15 |
| 2010 | 2 | 12 |
| 2011 | 2 | 20 |
| 2012 | 9 | 26 |
| 2013 | 7 | 25 |
| 2014 | 16 | 31 |
| 2015 | 15 | 46 |
| 2016 | 20 | 24 |
| 2017 | 31 | 33 |
| 2018 | 30 | 26 |
| 2019 | 25 | 25 |
| 2020 | 21 | 24 |
| 2021 | 18 | 35 |
| 2022 | 20 | 19 |
| 2023 | 20 | 22 |
| 2024 | 26 | 22 |
| 2025 | 10 | 15 |
| 2026 | 8 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Integrated heating system using a Stirling heat pump18 Aug 2026US 12,710,202 B2Trane International Inc.
- Push/pull furnace and methods related thereto14 Jul 2026US 12,680,693 B2Trane International Inc.
- Quick heat algorithm for modulating heating equipment14 Jul 2026US 12,680,719 B2Johnson Controls Light Commercial IP GmbH
- System for adjusting and controlling temperature of intelligent new energy farmhouse integrated with tunnel wind and solar energy7 Jul 2026US 12,674,586 B2Beijing Anxing Hi-Tech New Energy Development Co., Ltd.
- Furnace30 Jun 2026US 12,669,266 B2Fire Chief Industries LLC
- Systems and Methods for Modulating Heating and/or Cooling Appliance Control Based on Return Air Temperature27 Aug 2026US 2026/0251337 A1Rheem Manufacturing Company
- Heating system with heat pump for internal installation13 Aug 2026US 2026/0235308 A1Innova, Inc.
- Air conditioning system using heat pump and air heating device4 Jun 2026US 2026/0153244 A1Kyungdong Navien Co., Ltd.
- Hybrid heating system with humidity control4 Jun 2026US 2026/0153253 A1Midea Group Co., Ltd.
- Infrared heating system28 May 2026US 2026/0146745 A1Herschel Infrared Ltd
Most cited
By later US patents
- Desiccant assisted air conditioner154US 4,887,438 A1989
- System and method for controlling temperature and humidity132US 6,199,388 B1Semco LLC · 2001
- Methods, systems, and related architectures for managing network connected thermostats130US 8,843,239 B2Nest Labs, Inc. · 2014
- Solar cell module73US 6,323,416 B1Canon Kabushiki Kaisha · 2001
- Space heating system, heater, and combustion chamber72US 5,553,604 A1996