I have one or two areas of my home that dont heat. Why?
This question can be answered most directly by a qualified service technician after system inspection. Some possibilities to consider for poor system performance are as follows: • Air-locks in the tubing system. Many homes built with radiant heat have a common supply in the concrete that tees to individual circuits for water distribution. If air becomes trapped in one circuit, some of the circuits containing solid water will properly circulate while bypassing those which are air-locked. A radiant panel needs the tubing to contain solid water for proper performance and heat transfer. The reasons for air entering the tubing system can depend on: 1) the type of embedded tubing. The plastic and rubber products can be oxygen permeable allowing air to diffuse through the tubing walls and into the system. Copper tubing does not have this problem. 2) The expansion tank which prevents the system pressure from increasing dramatically during system operation can release its air into the system. A
