Garrett at one time was AiResearch. Cliff Garret openned AiResearch Aviation back in the late 40's at what is now LAX. AiResearch Aviation was renamed to Garrett General Aviation Services Company in 1985. So the company name Garret or AiResearch is the same company.
They are very big in aviation for turbine everything. Turbine APU engines, turbine air conditioning machines (turbos for aircraft air conditioning), air to air heat exchangers for air conditioning (intercoolers) and a bunch of other things.
