Navien NCB700 42KW Combi & Flue Pack - In Store Payment and Collection Only
NAVIEN NCB700 42 & FLUE
- Collection Only
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NCB700 ON The Powerful Combi Crossover
The game-changing NCB700 ON combi gas boiler from Navien is the first product of its type capable of delivering hot water to three bathrooms simultaneously. Shattering all preconceptions of a combi boiler’s suitability for large properties, the NCB700 ON cleverly maximises recirculation of domestic hot water (DHW) to significantly reduce water wastage and offer flow rates up to an industry-leading 22 litres per minute (at 35°C temperature rise).
- Built-in DHW recirculation pump for super fast hot water delivery
- Powerful 54kW hot water output delivering up to 22lpm
- Industry-leading turndown ratio of 15:1 for supreme efficiencies
- Easy to use built-in digital display panel displays energy usage
- 12 YEAR WARRANTY for complete peace of mind
- ErP A+ energy efficiency rating for ultra-low running costs*
- IPX4 rating provides protection from any water leaks
- NaviCirc™ for simple and fast set up of hot water return system
- Stainless steel heat exchangers for optimum durability and long term efficiencies
- Hydrogen-ready (20% blend) technology for futureproofing
- 3-zone ready with Smart Plus control pack
- An A+ energy rating is achieved when installed with a single Smart Plus room thermostat.
Technical Data
| NCB700-2S+/42K | NCB700-3S/54K | ||
| Shower rating | Number of showers | Two showers & one tap | Three showers |
| Heat Output | Heat input range | 35.0/3.5kW | 35/3.5kW |
| Modulation (max/min) | 10:1 | 15:1 | |
| Heat output range @ 80/60°C | 34.0/3.4kW | 34.0/3.4kW | |
| DHW | DHW heat input range | 40.6/3.5kW | 52.4/3.5kW |
| DHW output range | 42.0/3.5kW | 54.0/3.5kW | |
| DHW flow rate @ 25°C temp. rise. | 24.1l/min | 31l/min | |
| DHW flow rate @ 30°C temp. rise. | 20.1l/min | 25.8l/min | |
| DHW flow rate for kitchen @ 45°C temp. rise. | 13.4l/min | 17.2l/min | |
| Flue | Flue Size | Coaxial length Ø 60/100 | |
| Max. horizontal coaxial length Ø60/100 | 20m | ||
| Max. vertical coaxial length Ø60/100 | 21m | ||
| Weight | Lift weight | 43kg | 46kg |
| Dimensions | Width x Depth x Height | 440 x 353 x 695mm | |
| ErP Efficiency | ErP A (94%) | ||
| ErP Efficiency with Single Smart Plus | ErP A+ (98%) | ||
| NOx Classification | Class 6 | ||
Delivery Information
We currently use Royal Mail, DPD, and Evri as our delivery partners. Orders are shipped on a 24-hour next working day service.
Please note, all delivery time frames provided are estimates only. While we aim to meet these times, delays may occasionally occur due to circumstances beyond our control.
Orders placed before 2:00pm (Monday to Friday) will be dispatched the same working day, subject to stock availability. Orders placed after 2:00pm will be dispatched the next working day. Orders placed after 2:00pm on a Friday will be dispatched on the following Monday (excluding bank holidays). We do not dispatch orders on weekends or bank holidays.
Delivery & Signatures
All orders are sent using tracked delivery services. For higher value orders, a signature will be required upon delivery.
For lower value orders, parcels may be delivered without a signature and may be left in a safe place or with a neighbour at the courier’s discretion.
If you choose to amend your delivery preferences directly with the courier (for example, requesting the parcel to be left in a safe place), this is done at your own risk. We cannot accept responsibility for any loss or damage once the parcel has been delivered in accordance with those instructions.
Delivery Options
Standard Delivery – £4.95
1–3 working days on in-stock items (excluding weekends and bank holidays).
1–5 working days on non-stock items.
Next Working Day Delivery – £6.00
Order before 2:00pm for same day dispatch.
1–5 working days on non-stock items.
Free Delivery – Orders over £75.00
Next working day delivery on in-stock items.
1–5 working days on non-stock items.
Our next working day delivery services are not guaranteed. As we rely on third-party couriers, we cannot be held liable for delays or any consequential losses caused by late deliveries.
If your order contains multiple items and any are out of stock, the full order will be dispatched once all items are available, unless otherwise agreed in advance.