This was taken using an iPhone 14Pro using the stereo recording feature of Voice Memos. It features a First Co Aquatherm FCU with a Taco circulator pump attached to hot and cold water lines to effectively heat or cool the coils.
The 60-Hz hum is the circulator pump, while the roaring/rumbling sound is the natural gas water heater, and the high-pitched whirring sound towards the end is the fan motor of the FCU/air handler unit, located in the ceiling.
Harmony's Sensational Sounds
Type
Wave (.wav)
Duration
1:07.146
File size
11.3 MB
Sample rate
44100.0 Hz
Bit depth
16 bit
Channels
Stereo
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