RINNAI ZEN-35 Combination Boiler (35kW) | Indoor & Outdoor Combi Boiler UK

🔥 RINNAI ZEN-35 Combi Boiler – Powerful, Smart & Energy Efficient

The RINNAI ZEN-35 Combination Boiler (35kW) is a high-performance heating solution designed for medium-sized homes and properties with higher hot water demand. Combining central heating and hot water in one compact unit, this advanced combi boiler delivers instant hot water and efficient heating without the need for a storage tank.

With WiFi-enabled smart controls, flexible indoor or outdoor installation, and exceptional energy efficiency, the ZEN-35 is a reliable and modern heating solution for homes and small commercial spaces across the UK and Ireland.

⭐ Key Features & Benefits

• 35kW Output: Ideal for medium-sized homes and multi-occupancy properties
• Indoor & Outdoor Installation: Flexible and space-saving setup
• Combi Boiler Design: Heating and hot water in one compact appliance
• High Efficiency (Up to 98%): Reduces energy usage and costs
• WiFi Smart Controls: Manage heating via mobile app or thermostat
• Instant Hot Water: No cylinder or storage tank required
• Compact Design: Perfect for modern installations
• Fast Heating Mode: Rapid hot water delivery
• Pre-Heat Function: Reduces water waste and improves comfort

🏡 Ideal Applications

The RINNAI ZEN-35 combi boiler is perfect for:

• Medium-sized homes
• Properties with one to two bathrooms
• Flats and apartments with higher demand
• Offices and small commercial spaces
• Installations requiring outdoor mounting

⚙️ Technical Specifications

• Model: RINNAI ZEN-35
• Output: 35 kW
• Boiler Type: Combination (Combi) Boiler / Can be configured as System Boiler
• Fuel Type: Gas
• Installation: Indoor / Outdoor
• Hot Water Supply: Instant (no storage required)
• Efficiency: Up to 98%
• Flue Type: 60/100 coaxial condensing flue

💧 Advanced Hot Water Performance

The ZEN-35 delivers consistent and precise temperature control:

• High temperature (up to 60°C): Ideal for kitchen use
• Low temperature (approx. 32°C): Suitable for wash basins
• Heating output (60–70°C): Reliable central heating

By heating water directly from the mains, the system eliminates the need for stored hot water, improving efficiency and reducing waste.

📱 Smart Controls & Energy Management

The Rinnai ME controller offers full control over your heating:

• WiFi-enabled with mobile app access (iOS)
• Built-in eco mode for energy savings
• Energy usage monitoring
• Includes room thermostat & controller
• Simple and user-friendly operation

🌦️ Built-in Smart Features

• Weather Compensation: Adjusts heating based on outdoor conditions
• Fast Heating Mode: Instant hot water when needed
• Pre-Heat Function: Minimises delays and water wastage

🔧 Flexible Installation Options

• Suitable for indoor or outdoor installation
• External installations require:
  • Storm collar protection, or
  • Proper flue sealing through roof

This flexibility makes the ZEN-35 ideal for a variety of property layouts.

📊 Why Choose the RINNAI ZEN-35 Boiler?

The ZEN-35 is designed for efficiency, performance, and convenience, making it a great choice for modern heating systems.

Key advantages:

• Handles higher hot water demand than smaller models
• Saves space with no tanks or cylinders
• Smart features improve energy efficiency
• Cost-effective installation and operation
• Reliable and durable design

🌍 Energy Efficient Heating Solution

With up to 98% efficiency, the RINNAI ZEN-35 helps reduce energy bills and environmental impact. It’s an ideal upgrade for homeowners seeking a smart, energy-saving heating system.

💬 Why Buy from Energy Fuel UK?

• Competitive pricing on RINNAI boilers
• Expert technical support
• Fast delivery across the UK & Ireland
• Trusted supplier of heating solutions
• Excellent after-sales service

❓ Frequently Asked Questions (FAQs)

Is the RINNAI ZEN-35 suitable for outdoor installation?
Yes, it is designed for both indoor and outdoor use.

Does it require a hot water cylinder?
No, it provides instant hot water directly from the mains.

Can it support multiple bathrooms?
Yes, it is suitable for properties with one to two bathrooms depending on demand.

Is it energy efficient?
Yes, with up to 98% efficiency, it helps reduce energy consumption and costs.