Air is for breathing,
Water is for drinking,
Refrigerant is for heat transfer!

TF&F employs R134a refrigerant and does not use water (or water based solutions) as liquid cooling agent for the following reasons:

1. R134a boils at ambient temperature absorbing latent heat while changing liquid to vapor. Vaporizing 6-7 gallons of R134a requires ~1KW of heat. For the same given volume with water cooled systems TF&F PLMC loop dissipates more power at the lower flow rate of coolant.

2. To avoid conductive leaks. Even a small drip of water can be devastating and permanently disable IT equipment, and cause expensive computing downtime. Unlike water, R134a is dielectric liquid. If it did ever leak, it would vaporize without causing any irreparable damage to the equipment.

3. To avoid biological growth = slime (microorganisms, including bacteria, fungi and algae, which produce, in aqueous systems -  objectionable from the operational and cooling perspective). When it grows it can virtually clog the water cooled system or substantially impede coolant flow. To control the slime growth in water systems it’s necessary to use compositions, inhibiting its growth. That increases water’s PH level and prompts for corrosion of the metal components in the water stream.
 
4. R134a application negates (typical for water cooled systems) galvanic corrosion when it’s needed to use dissimilar metals (widely available aluminum condenser and efficient copper cold plates and pipes).

5. TF&F employs solder/brazing technology in cooling systems in order to avoid leaky joints, which are the subject of ongoing optimization in water cooled systems.

6. With TF&F PLMC cooling systems there is no need to worry about coolant anti freeze treatment, necessary in water systems.