Best Answer: 1) As the person above said: carbon, hydrogen, and oxygen. 2) No. This is unless we consider formic acid as a fatty acid (CH2O2), but the definition of a fatty acid is a carboxylic acid with a LONG unbranched aliphatic tail that is either saturated or unsaturated.
When the tubing is cool, the warm and moist air may condense in the tubing. Not only will you not get the benefit of the moisture, but it can collect and drip into your face or gurgle with the air flow. It is often worse when the bedroom environment is cool or cold compared to the temperature of the pressurized air.
On a manual mixing valve or tempering valve if we  close  the manual valve by turning it clockwise we are are admitting less cold water into the mixing process, thus making the output water temperature hotter at plumbing fixtures in the building. Here is a manual mixing valve on a hydronic heating system.y manual hot water tempering valve we mean that the plumber has installed an ordinary plumbing valve and a cold water bypass pipe to mix some cold water into the water heater's outgoing hot water supply.