Water Chillers and Heaters
Nutrient solutions and irrigation water is most effective within a certain temperature range. If the liquid is too hot the plant can be damaged by hot water on sensitive root systems. If the liquid is too cold the plants have similar problems and reservoirs and piping can be subject to freezing and bursting. Many times reservoirs of nutrient solutions or water inside hot grow rooms can leave the optimal temperature range, especially when hot grow lights are in use nearby. To solve this problem water chillers were designed for use with agricultural applications. These chillers keep liquids cooler and make plants grow more effectively.
On the other end of the spectrum there are growers in colder climates trying to extend their growing season or even grow year round. Their irrigation system can be subject to freezing temperatures and the damage that expanding ice can do to reservoirs and expensive growing equipment. To combat this problem reservoir heaters were developed to keep the liquids warmer and protect tanks from freezing.