Navien boilers
Get a Navien boiler installed from £1,790
Plus, use code FREESERVICEPLAN to get a year's free service plan with your new boiler*
The UK’s largest installer of Navien boilers
Pay monthly from £24 a month with no deposit¹
We’ll beat any like-for-like quote²
Navien NCB 300 30kw: exclusive to BOXT
Exclusively designed by BOXT, built by one of the world’s largest boiler manufacturers. This powerful model has the performance and hot water flow rate to match Britain’s best-selling boiler.
It features:
- A sleek, easy-to-use touch-screen display
- A high-quality stainless steel heat exchanger
- Compact dimensions, suitable for a standard kitchen cupboard
- An energy rating of A, with the potential to be A+ with Smart Plus Controller
Our most popular Navien boilers
For small to medium sized homes
Navien NCB 300
This highly efficient combi boiler supports LPG and natural gas systems, and is available in outputs ranging from 28kw to 41kw. Expertly installed by a Gas Safe engineer from £1,790.
For larger homes
Navien NCB 500
This powerful combi boiler supports natural gas systems, and is available in a range of outputs including 32kw and 37kw. Expertly installed by a Gas Safe engineer from £2,249.
How much is a Navien boiler?
BOXT offers fixed-price quotes that are valid for 30 days. Your new A-rated Navien boiler can be fitted from £1,790, which includes installation by a Gas Safe registered engineer and the removal of your old system. Please note that prices may vary based on your home's requirements.
Top tip: The BOXT Price Match Promise can be used in conjunction with all Navien combi boilers.
BOXT engineers love Navien boilers because...
“They’re clearly designed with installers in mind. They’re compact, lightweight, and easy to get on the wall, even in awkward spaces. The commissioning process is quick, the diagnostics are clear, and the technology is smart without being overcomplicated. That saves me time on install day and makes future servicing much simpler.”
Who is Navien?
As the world's fourth-largest gas boiler manufacturer, Navien has built a strong reputation for designing reliable, energy-efficient, and easy-to-install boilers since 1978.
Today, each model is meticulously built in the world's largest single-site manufacturing plant for heating products. They've proudly created over two million systems in their state-of-the-art facility, helping homeowners to reduce their energy bills and carbon emissions without compromising comfort.
How efficient are Navien boilers?
Navien designs and manufactures some of the most energy-efficient boilers. For decades, they've been developing energy and water-saving technologies, resulting in a range of systems that can operate up to 98% efficiency, saving households up to 8,000 litres of water each year.
How long do Navien boilers last?
Navien has an excellent reputation for building high-quality boilers that are built to last, thanks to its careful craftsmanship and extensive quality control checks. Each system comes with a manufacturer-backed warranty ranging from five to 10 years, which covers parts and labour. And with regular servicing, your Navien boiler can last up to 20 years before needing to be replaced.
How does a Navien combi boiler work?
Navien combi boilers provide hot water and heating on demand throughout your home. Unlike system or standard boilers, they don't require additional water tanks or a hot water storage cylinder.
To operate, just turn on your hot water tap or radiator, and the gas burner inside the boiler will ignite. This transfers warmth through a stainless steel heat exchanger to the water and is delivered to your outlet.
Navien combi boilers feature a sleek control pad that enables you to easily control the boiler's settings and can be linked to a thermostat.
Navien boilers from BOXT
Our prices for a new Navien boiler start from just £1,790, which includes installation by a Gas Safe registered engineer.
To help you manage the cost of buying a new or replacement Navien boiler, we have finance packages available with repayment periods ranging from 12 to 120 months.
Pick your preferred way to pay
Spread the cost on selected boilers with a 50% deposit.
From £24 a month
Switch to BOXT Life, our all-inclusive boiler plan with annual servicing and unlimited repairs.
From £33.35 a month
Pay a £0 deposit over 12 months, with 0% APR.
From £149.16 per month
Get your new Navien boiler installed with ease
At BOXT, we partner with leading manufacturing companies, like Navien, to provide you with a range of options that suit every home and budget.
As the UK's first online boiler installation company, we've made finding the right system quick and easy. Just answer a few simple questions about your home, and enjoy a personalised list of high-quality boiler recommendations.
Then, book your installation date online as soon as the next working day.
Did you know: Your Navien boiler is designed for easy installation and servicing. Its key components are pre-built into the boiler's body, while its user-friendly interface allows for quick and easy connection and control.
Get your Navien boiler in four simple steps
Discover
Answer a few questions about your home online to get a fixed price quote in 90 seconds
Choose
We'll give you boiler recommendations based on your answers, then choose your boiler and payment option
Installation
A BOXT Gas Safe registered engineer can install for you the next working day if ordered before 3pm
Maintain
Keep track of your install with the BOXT app, and find all your important documents in one place
Need a Navien boiler service?
A boiler service is an important yearly check up to keep your boiler safe and help keep your warranty valid.
A boiler service from BOXT costs £8.99 a month (or £11.99 a month for a landlord service), so you can keep your Navien boiler in top shape while spreading the cost throughout the year.
Navien boiler repairs
We've got you covered if your Navien boiler needs a repair. For a fixed price of £89, a BOXT accredited engineer will come out to fix your Navien.
If it’s a bigger job requiring specific parts, we’ll give you a no obligation fixed price there & then to complete the job. Check out our price guide for boiler repairs, so you'll never be surprised.
