What should you consider when choosing a new residential boiler?

Brand: Go with Burnham or Weil-McClain Efficiency: 90%+. Faster payback. Installer: Licensed Installer that gives you 1 price- delivered & installed. Brand: Go with Burnham or Weil-McClain Efficiency: 90%+. Faster payback. Installer: Licensed Installer that gives you 1 price- delivered & installed.