Rinnai's Ultra Series condensing tankless water heater models RUC98i and RUC80i feature a built-in system that allows for both concentric and twin-pipe PVC venting from the same unit.
Korean boiler manufacturer KD Navien will expand its product line in the United States and Canada in the fourth quarter when they begin selling the Navien Heating Boiler series.
An installer who is used to boiler replacements may view the mechanical room aspects of changing from a boiler to a geothermal heat pump the same as a boiler changeout; just swapping out one “box” for another. Unfortunately, this can lead to some significant operating problems.
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