Top 100 Contractors in NAICS 3334: Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing, FY2022

Name: Top 100 Contractors in NAICS 3334: Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing, FY2022
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2021 – Sep 30, 2022 Code page on GovTribe

The top 10 won 52% of FY2022 NAICS 3334 contract dollars

Contract obligations: $376,346,035 Net of deobligations, by contracts coded NAICS 3334 or a code under it
Contractors: 1,191 Parent companies with an obligation
Largest contractor: Hunter Defense Technolog $70 million, 17.8% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Hunter Defense Technolog 4 awardees, including Berg Manufacturing, Inc. and HDT Expeditionary Systems Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$70,047,560	17.8%	Rank history: #5 in FY2021, #1 in FY2023, #22 in FY2024 and not on the FY2025 list; up 4 since FY2021.
2	DCM Clean Air Products, Inc. Top agencies DLA (Defense Logistics Agency)	$54,056,370	13.8%	Rank history: #1 in FY2021, #2 in FY2023 and not on the FY2024–FY2025 lists; down 1 since FY2021.
3	Howden American Fan Company Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) DHS (Department of Homeland Security)	$14,118,466	3.6%	Rank history: #10 in FY2021, #16 in FY2023 and not on the FY2024–FY2025 lists; up 7 since FY2021.
4	W S Darley & Co Top agencies USAF (Department of the Air Force)	$13,571,048	3.5%	Rank history: not on the FY2021 list, #6 in FY2023 and not on the FY2024–FY2025 lists; up 279 since FY2021.
5	Cepeda Associates, Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$13,405,123	3.4%	Rank history: #22 in FY2021, #9 in FY2023, #8 in FY2024 and #11 in FY2025; up 17 since FY2021.
6	General Dynamics Corporation 4 awardees, including General Dynamics Land Systems Inc. and Electric Boat Corporation Top agencies Army (Department of the Army) Navy (Department of the Navy)	$12,059,561	3.1%	Rank history: #83 in FY2021, #3 in FY2023 and not on the FY2024–FY2025 lists; up 77 since FY2021.
7	Johnson Controls Security Solutions LLC 8 awardees, including Johnson Controls Navy Systems, LLC, Johnson Controls, Inc. and Johnson Controls Building Automation Systems, LLC Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency) VA (Department of Veterans Affairs)	$10,448,711	2.7%	Rank history: #2 in FY2021, #5 in FY2023, #9 in FY2024 and not on the FY2025 list; down 5 since FY2021.
8	Honeywell International Inc. 4 awardees, including Honeywell Inc. and Honeywell Building Solutions GMBH Top agencies HUD (Department of Housing and Urban Development) USAF (Department of the Air Force) Army (Department of the Army)	$7,703,480	2.0%	Rank history: #3 in FY2021, #7 in FY2023, #2 in FY2024 and #62 in FY2025; down 5 since FY2021.
9	RTX Corporation 8 awardees, including Hamilton Sundstrand Corporation, Raytheon Company and Carrier Singapore (Pte) Limited Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency) DOS (Department of State)	$6,216,796	1.6%	Rank history: #8 in FY2021, #18 in FY2023 and not on the FY2024–FY2025 lists; down 1 since FY2021.
10	Leonardo S.p.A. 3 awardees, including Engineered Coil Company and DRS Naval Power Systems Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) DHS (Department of Homeland Security)	$4,137,263	1.1%	Rank history: #7 in FY2021, #30 in FY2023, #6 in FY2024 and #6 in FY2025; down 3 since FY2021.
11	Hansome Energy Systems Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$4,110,782	1.0%	Rank history: #34 in FY2021, #4 in FY2023, #3 in FY2024 and #13 in FY2025; up 23 since FY2021.
12	Windward Enterprises, LLC Top agencies DLA (Defense Logistics Agency)	$3,428,633	0.9%	Rank history: #12 in FY2021, #17 in FY2023, #20 in FY2024 and #25 in FY2025; unchanged since FY2021.
13	Filtration Services, Inc. Top agencies DOJ (Department of Justice)	$2,567,574	0.7%	Rank history: #42 in FY2021, #22 in FY2023, #16 in FY2024 and #16 in FY2025; up 29 since FY2021.
14	Complete Packaging and Shipping Supplies, Inc. Top agencies DLA (Defense Logistics Agency) VA (Department of Veterans Affairs) GSA (General Services Administration)	$2,485,055	0.6%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 152 since FY2021.
15	Kampi Components Co Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) USAF (Department of the Air Force)	$2,459,090	0.6%	Rank history: #13 in FY2021, #26 in FY2023, #18 in FY2024 and #22 in FY2025; down 2 since FY2021.
16	Gnap LLC Top agencies Army (Department of the Army)	$2,262,350	0.6%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
17	Argo Turboserve Corporation Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$2,220,563	0.6%	Rank history: #18 in FY2021, #25 in FY2023, #25 in FY2024 and #20 in FY2025; up 1 since FY2021.
18	Saudi Naval Support Co. Top agencies USAF (Department of the Air Force)	$2,215,590	0.6%	Rank history: #72 in FY2021, #43 in FY2023, #43 in FY2024 and not on the FY2025 list; up 54 since FY2021.
19	Pioneer Industries, LLC Top agencies DLA (Defense Logistics Agency)	$2,158,333	0.5%	Rank history: #37 in FY2021, #68 in FY2023, #63 in FY2024 and #4 in FY2025; up 18 since FY2021.
20	Parker-Hannifin Corporation 3 awardees Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) DHS (Department of Homeland Security)	$2,129,897	0.5%	Rank history: #30 in FY2021, #48 in FY2023 and not on the FY2024–FY2025 lists; up 10 since FY2021.
21	Accentz, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$1,992,579	0.5%	Rank history: #47 in FY2021, #35 in FY2023, #62 in FY2024 and #28 in FY2025; up 26 since FY2021.
22	Janels Industries Inc. Top agencies DLA (Defense Logistics Agency)	$1,952,233	0.5%	Rank history: #24 in FY2021, #19 in FY2023, #38 in FY2024 and #34 in FY2025; up 2 since FY2021.
23	Ashland Electric Products Inc. Top agencies DLA (Defense Logistics Agency)	$1,797,012	0.5%	Rank history: #21 in FY2021, #32 in FY2023, #26 in FY2024 and #37 in FY2025; down 2 since FY2021.
24	Tactical Environmental Systems Inc. Top agencies Army (Department of the Army)	$1,773,959	0.5%	Rank history: not on the FY2021 list, #36 in FY2023 and not on the FY2024–FY2025 lists; new.
25	Lockheed Martin Corporation 5 awardees Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$1,730,456	0.4%	Rank history: not on the FY2021 list, #53 in FY2023, not on the FY2024 list and #50 in FY2025; up 119 since FY2021.
26	Kellstrom Defense Aerospace Inc. Through Allclear Aerospace & Defense, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) USAF (Department of the Air Force)	$1,717,143	0.4%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
27	Mainstream Engineering Corp Top agencies DLA (Defense Logistics Agency)	$1,582,931	0.4%	Rank history: not on the FY2021 list, not on the FY2023 list, #5 in FY2024 and #9 in FY2025; up 345 since FY2021.
28	Lektron Inc. Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$1,485,940	0.4%	Rank history: #78 in FY2021, #94 in FY2023, #56 in FY2024 and #48 in FY2025; up 50 since FY2021.
29	Labrepco Inc. Top agencies HHS (Department of Health and Human Services) USDA (Department of Agriculture) VA (Department of Veterans Affairs)	$1,484,395	0.4%	Rank history: #36 in FY2021, #33 in FY2023 and not on the FY2024–FY2025 lists; up 7 since FY2021.
30	Tyonek Native Corporatio Through Tfab Defense Systems LLC Top agencies Army (Department of the Army)	$1,443,249	0.4%	Rank history: #4 in FY2021, #13 in FY2023, #71 in FY2024 and not on the FY2025 list; down 26 since FY2021.
31	Trane U.S. Inc. 2 awardees Top agencies DOS (Department of State) DOJ (Department of Justice) NASA (National Aeronautics and Space Administration)	$1,434,342	0.4%	Rank history: not on the FY2021 list, #50 in FY2023, not on the FY2024 list and #85 in FY2025; up 98 since FY2021.
32	Export 220Volt Inc. Top agencies DOS (Department of State)	$1,390,912	0.4%	Rank history: #90 in FY2021, #84 in FY2023, #55 in FY2024 and #91 in FY2025; up 58 since FY2021.
33	Paradigm Mechanical Corp. Top agencies Navy (Department of the Navy)	$1,379,320	0.4%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
34	Aantilia LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$1,335,794	0.3%	Rank history: #97 in FY2021, #57 in FY2023, #76 in FY2024 and #30 in FY2025; up 63 since FY2021.
35	3ON Systems Inc. Top agencies DLA (Defense Logistics Agency)	$1,295,215	0.3%	Rank history: #84 in FY2021, #71 in FY2023 and not on the FY2024–FY2025 lists; up 49 since FY2021.
36	Northrop Grumman Corporation 3 awardees, including Northrop Grumman Systems Corporation Top agencies Army (Department of the Army) Navy (Department of the Navy)	$1,294,092	0.3%	Rank history: not on the FY2021 list, not on the FY2023 list, #11 in FY2024 and not on the FY2025 list; new.
37	Xenex Disinfection Services Inc. Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) DHA (Defense Health Agency)	$1,280,241	0.3%	Rank history: #49 in FY2021, #51 in FY2023, #32 in FY2024 and #67 in FY2025; up 12 since FY2021.
38	Percival Scientific Incorporated Top agencies USDA (Department of Agriculture) Commerce (Department of Commerce)	$1,253,452	0.3%	Rank history: #51 in FY2021, #44 in FY2023, #42 in FY2024 and not on the FY2025 list; up 13 since FY2021.
39	Phoenix Systems Engineering Inc. Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force) Army (Department of the Army)	$1,253,109	0.3%	Rank history: #44 in FY2021, #46 in FY2023, #59 in FY2024 and #58 in FY2025; up 5 since FY2021.
40	Energy Quest Technologies Inc. Top agencies USAF (Department of the Air Force)	$1,245,000	0.3%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
41	Aero Precision Industries LLC Through Allclear Aerospace & Defense, Inc. Top agencies DLA (Defense Logistics Agency)	$1,240,858	0.3%	Rank history: #29 in FY2021, #27 in FY2023, #23 in FY2024 and not on the FY2025 list; down 12 since FY2021.
42	Berkeley Building Company Top agencies Army (Department of the Army)	$1,217,672	0.3%	Rank history: #50 in FY2021 and not on the FY2023–FY2025 lists; up 8 since FY2021.
43	Design West Technologies Inc. Top agencies Army (Department of the Army)	$1,181,688	0.3%	Rank history: #19 in FY2021, #8 in FY2023 and not on the FY2024–FY2025 lists; down 24 since FY2021.
44	Snowbird Environmental Systems Corporation Through Snowbird Technologies Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$1,170,457	0.3%	Rank history: #15 in FY2021, #23 in FY2023 and not on the FY2024–FY2025 lists; down 29 since FY2021.
45	Select Gases, LLC Top agencies HHS (Department of Health and Human Services)	$1,139,745	0.3%	Rank history: #59 in FY2021 and not on the FY2023–FY2025 lists; up 14 since FY2021.
46	Flagship Marine, Inc. Top agencies Navy (Department of the Navy)	$1,097,218	0.3%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
47	Keysight Technologies, Inc. Top agencies Navy (Department of the Navy)	$1,086,201	0.3%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
48	B & H International LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$1,051,597	0.3%	Rank history: not on the FY2021 list, #99 in FY2023, #79 in FY2024 and not on the FY2025 list; new.
49	Outdoor Venture Corp 3 awardees, including Ovc-Engineered Solutions LLC Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$1,034,321	0.3%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 258 since FY2021.
50	Howell Laboratories Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$1,018,105	0.3%	Rank history: #57 in FY2021 and not on the FY2023–FY2025 lists; up 7 since FY2021.
51	International Thermal Research Ltd Top agencies DLA (Defense Logistics Agency)	$1,012,598	0.3%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 68 since FY2021.
52	The RAE Corporation Top agencies DOT (Department of Transportation)	$973,994	0.2%	Rank history: #65 in FY2021 and not on the FY2023–FY2025 lists; up 13 since FY2021.
53	Dela Technology Corporation Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$961,863	0.2%	Rank history: not on the FY2021 list, #37 in FY2023, #45 in FY2024 and #71 in FY2025; up 296 since FY2021.
54	Euramco Safety, Inc. Top agencies Navy (Department of the Navy)	$915,319	0.2%	Rank history: #39 in FY2021, #97 in FY2023 and not on the FY2024–FY2025 lists; down 15 since FY2021.
55	Thermo Electron Corporation 4 awardees, including Fisher Scientific Company L.L.C. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$883,967	0.2%	Rank history: #31 in FY2021 and not on the FY2023–FY2025 lists; down 24 since FY2021.
56	Quality Refrigeration Company, Inc. 2 awardees Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security) Navy (Department of the Navy)	$883,546	0.2%	Rank history: #41 in FY2021, #76 in FY2023, #57 in FY2024 and #39 in FY2025; down 15 since FY2021.
57	Prime Veritas General Trading & Contracting Top agencies USAF (Department of the Air Force)	$858,415	0.2%	Rank history: not on the FY2021 list, not on the FY2023–FY2024 lists and #66 in FY2025; new.
58	Am General LLC 2 awardees, including Howden North America Inc. Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security) DLA (Defense Logistics Agency)	$812,804	0.2%	Rank history: not on the FY2021 list, #47 in FY2023 and not on the FY2024–FY2025 lists; up 292 since FY2021.
59	Clayton Associates Inc. Top agencies DLA (Defense Logistics Agency)	$799,834	0.2%	Rank history: #23 in FY2021, #28 in FY2023, #19 in FY2024 and #27 in FY2025; down 36 since FY2021.
60	TLD America Corporation Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$797,220	0.2%	Rank history: #20 in FY2021 and not on the FY2023–FY2025 lists; down 40 since FY2021.
61	Imeco Inc. 2 awardees, including Trident Maritime Systems, Inc. Top agencies Navy (Department of the Navy)	$765,526	0.2%	Rank history: #64 in FY2021, #67 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2021.
62	Long Building Technologies, Inc. Top agencies Army (Department of the Army)	$726,923	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
63	General Aire Systems, Inc. Top agencies Navy (Department of the Navy) Treasury (Department of the Treasury)	$717,674	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 204 since FY2021.
64	Wisecom Technologies Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) DISA (Defense Information Systems Agency)	$715,509	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
65	Protec Facility Solutions GMBH Top agencies DECA (Defense Commissary Agency) USAF (Department of the Air Force)	$707,640	0.2%	Rank history: #93 in FY2021, #11 in FY2023, #15 in FY2024 and not on the FY2025 list; up 28 since FY2021.
66	Mcnally Industries LLC Top agencies Navy (Department of the Navy)	$705,282	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
67	Filtmore Technologies LLC Top agencies Army (Department of the Army)	$694,065	0.2%	Rank history: not on the FY2021 list, #63 in FY2023 and not on the FY2024–FY2025 lists; up 50 since FY2021.
68	Portable Air Group LLC Top agencies DLA (Defense Logistics Agency) Army (Department of the Army) USAF (Department of the Air Force)	$686,219	0.2%	Rank history: #81 in FY2021, #39 in FY2023, #33 in FY2024 and #90 in FY2025; up 13 since FY2021.
69	Phoenix Trading Inc. Top agencies DLA (Defense Logistics Agency)	$661,688	0.2%	Rank history: #55 in FY2021, #54 in FY2023, #50 in FY2024 and #35 in FY2025; down 14 since FY2021.
70	Fischer Panda Generators, Inc. Top agencies Army (Department of the Army)	$660,654	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
71	The L.c.doane Company Top agencies DLA (Defense Logistics Agency)	$655,010	0.2%	Rank history: #70 in FY2021, #52 in FY2023, #65 in FY2024 and #74 in FY2025; down 1 since FY2021.
72	Aktio Corporation Top agencies Navy (Department of the Navy)	$642,849	0.2%	Rank history: #68 in FY2021 and not on the FY2023–FY2025 lists; down 4 since FY2021.
73	Aldevra LLC Top agencies VA (Department of Veterans Affairs)	$632,026	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 83 since FY2021.
74	D.l. Martin Co. Top agencies Navy (Department of the Navy)	$620,110	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
75	Space Al Arabi General Trading Co. WLL Top agencies USAF (Department of the Air Force)	$618,212	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 39 since FY2021.
76	Meggitt Defense Systems Inc. Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$603,708	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
77	Oshkosh Corp Through Oshkosh Defense LLC Top agencies DLA (Defense Logistics Agency)	$598,693	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 107 since FY2021.
78	Warfighter Focused Logistics Inc. Top agencies DLA (Defense Logistics Agency)	$584,254	0.1%	Rank history: not on the FY2021 list, #65 in FY2023, #92 in FY2024 and #56 in FY2025; up 201 since FY2021.
79	Meggitt PLC 2 awardees, including Meggitt Defense Systems, Inc. Top agencies DLA (Defense Logistics Agency)	$583,721	0.1%	Rank history: #100 in FY2021 and not on the FY2023–FY2025 lists; up 21 since FY2021.
80	Dunbar Mechanical Contractors, LLC Top agencies VA (Department of Veterans Affairs)	$583,338	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
81	Linmarr Associates, Inc. Top agencies DLA (Defense Logistics Agency)	$577,415	0.1%	Rank history: not on the FY2021 list, not on the FY2023–FY2024 lists and #84 in FY2025; up 167 since FY2021.
82	S I T Corporation Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security) Navy (Department of the Navy)	$555,895	0.1%	Rank history: #60 in FY2021, #95 in FY2023, #47 in FY2024 and #33 in FY2025; down 22 since FY2021.
83	Pacific General Trading and C Ontracting Establishment Top agencies USAF (Department of the Air Force)	$552,514	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 114 since FY2021.
84	LN Curtis & Sons Top agencies Navy (Department of the Navy)	$542,161	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
85	Noresco LLC 2 awardees, including Carrier Corporation Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy) USAF (Department of the Air Force)	$536,625	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 65 since FY2021.
86	O.C. Lugo Co. Inc. the Top agencies DLA (Defense Logistics Agency)	$533,808	0.1%	Rank history: #16 in FY2021, #10 in FY2023, #10 in FY2024 and #5 in FY2025; down 70 since FY2021.
87	Gardner Co Inc Top agencies DMA (Defense Media Activity)	$522,285	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
88	Adrick Marine Group, Inc. Top agencies DHS (Department of Homeland Security)	$520,391	0.1%	Rank history: #79 in FY2021, not on the FY2023 list, #86 in FY2024 and not on the FY2025 list; down 9 since FY2021.
89	Dynamic Air Engineering, Inc. Top agencies DLA (Defense Logistics Agency)	$509,529	0.1%	Rank history: #32 in FY2021, #58 in FY2023, #41 in FY2024 and #24 in FY2025; down 57 since FY2021.
90	Native Instinct LLC Top agencies USAF (Department of the Air Force) VA (Department of Veterans Affairs) Army (Department of the Army)	$496,370	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
91	Multistack LLC Top agencies DOS (Department of State)	$494,868	0.1%	Rank history: #77 in FY2021 and not on the FY2023–FY2025 lists; down 14 since FY2021.
92	Government Sales, LLC Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$491,386	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 107 since FY2021.
93	Trillamed LLC Top agencies VA (Department of Veterans Affairs)	$489,635	0.1%	Rank history: not on the FY2021 list, not on the FY2023 list, #98 in FY2024 and #70 in FY2025; up 138 since FY2021.
94	Global Service Titan LLC Top agencies DOS (Department of State)	$488,696	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 46 since FY2021.
95	Government of the United States 3 awardees, including Federal Prison Industries, Inc. Top agencies Army (Department of the Army) DOJ (Department of Justice) USDA (Department of Agriculture)	$486,167	0.1%	Rank history: #53 in FY2021, #49 in FY2023, #29 in FY2024 and #41 in FY2025; down 42 since FY2021.
96	Filtration Group Corporation 2 awardees, including Molecular Products Inc. and Facet (Oklahoma) LLC Top agencies DLA (Defense Logistics Agency)	$483,688	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 111 since FY2021.
97	Venergy Group LLC Top agencies VA (Department of Veterans Affairs) Army (Department of the Army)	$482,813	0.1%	Rank history: #66 in FY2021, #62 in FY2023, #85 in FY2024 and not on the FY2025 list; down 31 since FY2021.
98	UNI Corporation Top agencies Navy (Department of the Navy)	$477,810	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
99	Highland Engineering, Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$476,433	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
100	Westsim Engineering, Inc. Top agencies DLA (Defense Logistics Agency)	$470,199	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 80 since FY2021.

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100 of 1,191 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 3334

Code	Net obligations	Largest contractor
33341 Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing	$376,346,035	Hunter Defense Technolog

How this ranking works

Source: every contract action FPDS records (as published on SAM.gov) in the period, as GovTribe received it.
Amounts are net obligations: what was obligated, less what was deobligated. Shares are of $393 million obligated before deobligations, so they never pass 100%.
Parent companies: each action counts under the ultimate parent its award record names, or under the awardee when it names none, so no dollar counts twice. Parents of the same name (Inc., LLC and the like aside) count as one company, since FPDS records a company's parent under more than one UEI over time. GovTribe corrects a few parents and names by hand; see the corrections.
Fiscal year 2022 ran Oct 1, 2021 – Sep 30, 2022. The Department of Defense reports its contract actions to FPDS about 90 days late, so a fiscal year is ranked once they're in, in February, and the list doesn't change after.
Rank changes compare with FY2021. "New" marks a company outside that period's top 500, and "Returned" one of those that was on an earlier fiscal year's list.
Rank lines show each company's rank on every fiscal year's list since FY2021, #1 at the top, on a scale that gives the top of the list more room. A dashed stretch spans years it wasn't on the list. The step from FY2021 takes the color of the rank change beside it.
Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

Quick answers

Who were the top 10 NAICS 3334 contractors in FY2022?

1. Hunter Defense Technolog ($70M), 2. DCM Clean Air Products, Inc. ($54.1M), 3. Howden American Fan Company ($14.1M), 4. W S Darley & Co ($13.6M), 5. Cepeda Associates, Inc. ($13.4M), 6. General Dynamics Corporation ($12.1M), 7. Johnson Controls Security Solutions LLC ($10.4M), 8. Honeywell International Inc. ($7.7M), 9. RTX Corporation ($6.22M), 10. Leonardo S.p.A. ($4.14M).

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