Refering back to the new heating system we have installed in our Growout Greenhouse (Part 1 and Part 2), we are going to send this warm water to an adjacent greenhouse. In the front of our Nisai Greenhouse, we have the BETN koi and our other very high quality nisai, which you can view in our online catalog. To provide these koi with the optimal growing conditions, we are not only heating the air but also the water. We have run insulated copper plumbing underground from the Growout Greenhouse to the Nisai Greenhouse. There are lines for both the feed and the return. The one major difference however, is that the heat exchanger for the Nisai Greenhouse is underwater in the tank, whereas the heat exchanger in the Growout Greenhouse is external to the tank.
