We can use boiling point of ammonia which is - 33.34 degree Celsius with the help of EG(ethylene glycol) which has the speciality of maintaining its temperature constant for a long time.
We can use the coolant for ventilation purposes.
Ethylene glycol is a chemical commonly used in many commercial and industrial applications including antifreeze and coolant.Practical e.g Ethylene glycol helps keep your car’s engine from freezing in the winter and acts as a coolant to reduce overheating in the summer. Other important uses of ethylene glycol include heat transfer fluids used as industrial coolants for gas compressors, heating, ventilating, and air-conditioning systems, and ice skating rinks.