•  High-efficiency vacuum type hot-water boiler
  •  The VEC-ESR Series is a vacuum type gas firing hot-water boiler which attains the highest boiler efficiency in hot-water boilers (except for condensing boilers) through the use of high efficiency smoke tubes.
     The boiler efficiency improves by 4% to 6% compared to our conventional hot-water boilers (VEC-ESN Series). The operation is very easy. You just push the button on the micro controller to operate the
  •  Installation Out Door type