Questions -
To maximise efficiency, boiler selection should be based on an in-depth survey of the property and an estimated calculation of heat loss inside the dwelling. Once the energy (kW or BTU/hr) requirement for the property has been assessed the boiler should be matched against this energy rating.
Rinnai UK recommend all appliances are serviced annually.
Please refer to the Legislation & Regulation section.
No. All Rinnai Water Heaters will protect themselves down as low as -15°C providing the electrical supply is left ON. They will NOT however protect any external pipe work against frost damage.