Because the price of fuel oil has increased dramatically over the last several months, an installer with lots of experience in installing conventional oil-fired boilers is asked to install a pellet-fired boiler. The boiler will supply a low-temperature floor heating system with a design output of 200,000 Btu/r. The installer understands that pellet boilers need thermal storage tanks, but assumes that many of the other installation details will be the same as for the oil-fired systems he’s worked with. The system he installs is shown in Figure 1. Can you look it over and diagnose what some of the problems might be? Can you propose a better design that would eliminate these problems?