Rinnai Zen 35kW Natural Gas Combi Boiler – ZEN35-NG | 98% Efficient | WiFi ME Controller | ErP A
Compact 35kW natural gas combination boiler for small to medium properties with one bathroom. 98% efficiency. ErP A-rated heating and hot water. Rinnai ME WiFi controller included — iOS and Android app, IoT/GPS control, eco function, energy monitor. Weather compensation, fast heating mode and DHW pre-heat built in. 14L/min hot water at 35°C rise. 60/100 coaxial condensing flue. IPX5. 1-year labour, 7-year parts warranty.
The Rinnai Zen 35kW is one of the most compact combination boilers on the market — 660 × 440 × 285mm — for installations where space is limited. As a condensing combination boiler it provides both central heating and domestic hot water from the mains without a storage tank, at 98% efficiency and ErP A-rated performance for both heating and DHW.
The Rinnai ME controller is included as standard — WiFi-enabled with a free iOS and Android app for remote control including temperature, scheduling and energy monitoring. The IoT integration allows GPS-based control — for example, set the heating to activate when you are a set distance from home. A room thermostat and temperature controller are also included for those who prefer non-app control.
Standard 60/100 coaxial condensing flue is connected for inlet and exhaust. For external installations — a storm collar is required to protect the flue spigot, or the flueing must pass through a roof with a suitable seal.
Key Features & Benefits
98% Efficiency - ErP A-Rated Heating and Hot Water - Maximum energy efficiency class across both CH and DHW functions.
14 Litres per Minute Hot Water at 35°C Rise - Strong hot water flow for a single bathroom property.
Rinnai ME WiFi Controller Included - iOS and Android app. IoT/GPS control (e.g. heating on when 10 miles from home). Built-in eco function and energy monitor.
Room Thermostat and Temperature Controller Included - For non-app control preference.
Weather Compensation Built In - Adjusts flow temperature based on outdoor temperature for additional efficiency gains.
Fast Heating Mode and DHW Pre-Heat - Rapid hot water supply and reduced waiting time.
One of the Most Compact on the Market - 660 × 440 × 285mm, 37kg.
60/100 Coaxial Condensing Flue - Standard horizontal flue connection. External installation requires storm collar or suitable roof penetration.
IPX5 Protection - Splash-proof for bathroom installations.
NOx Class 6 - Low NOx emissions.
43 dB Sound Power Level - Quiet operation.
1-Year Labour / 7-Year Parts Warranty
Ideal For
Small to medium properties with one bathroom
Replacement of an existing combi boiler where a compact unit is preferred
Installations requiring ErP A-rated efficiency and smart WiFi controls as standard
98% efficient, A-rated, WiFi-controlled natural gas combi — WiFi ME controller included as standard. Order today. Gas Safe registered engineer installation required. For external installations a storm collar or suitable roof penetration is required for the flue spigot.
Specification
Rinnai Zen 35kW Natural Gas Combi Boiler Specification
Rinnai ME WiFi controller, room thermostat, temperature controller
Warranty
1 year labour / 7 years parts
Features
Rinnai Zen 35kW Natural Gas Combi Boiler Features
98% Efficiency - ErP A-Rated Heating and Hot Water - Maximum energy efficiency class across both CH and DHW functions.
14 Litres per Minute Hot Water at 35°C Rise - Strong hot water flow for a single bathroom property.
Rinnai ME WiFi Controller Included - iOS and Android app. IoT/GPS control (e.g. heating on when 10 miles from home). Built-in eco function and energy monitor.
Room Thermostat and Temperature Controller Included - For non-app control preference.
Weather Compensation Built In - Adjusts flow temperature based on outdoor temperature for additional efficiency gains.
Fast Heating Mode and DHW Pre-Heat - Rapid hot water supply and reduced waiting time.
One of the Most Compact on the Market - 660 × 440 × 285mm, 37kg.
60/100 Coaxial Condensing Flue - Standard horizontal flue connection. External installation requires storm collar or suitable roof penetration.
IPX5 Protection - Splash-proof for bathroom installations.
