Tim says, "The FCX significantly outperforms every boiler I have installed. In similar time frames in the winter of 2012, the Buderus used an average 6.89 GPD, the Viessmann 5.88 GPD, and the FCX 4.27 GPD. This calculates to a savings advantage of 1.61 GPD over the Viessmann and a 2.62 GPD over the Buderus. Not only that, percentage-wise, the Viessmann used 38% more fuel than the FCX, and the Buderus used over 60% more fuel than the FCX..."
Read More Reviews