BudgetCompact
Navien NCB 300
5-Year Warranty*
Installed from
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£1,945£2,015
Boiler, fitting & VAT included
Navien boilers.
Prices & installation.
Heating and hot water to suit your home. Get a Navien boiler from £1,945, including installation and VAT.
- Gas Safe registered engineers
- Fixed installation price
Navien NCB300Boiler, fitting & VAT included
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Navien boiler prices, with fitting included.
Our Navien boilers start from £1,945 installed. Compare the range below, then get a fixed quote for your home. Prices include the boiler, installation and VAT.
Combi boilers
*Warranty length depends on the model and package. Manufacturer terms, registration and annual servicing requirements apply. Your quote confirms the cover included.
What affects the price?
Your boiler model, hot-water demand and installation work all matter. Moving the boiler or converting from a regular boiler to a combi can cost more than a like-for-like replacement.
Which boiler type suits your home?
Your hot-water use and existing heating system matter more than choosing the biggest boiler.
Combi boilers
Heating and hot water from one unit. A combi heats water when you turn on a tap, without a separate hot-water cylinder.
A practical option when you want to free up space.
System boilers
A system boiler works with a hot-water cylinder, storing hot water ready for use.
Worth considering if several bathrooms need hot water at the same time.
Regular boilers
Also called heat-only boilers, these work with a separate cylinder and usually a cold-water tank.
Replacing like for like can avoid changing the whole heating system.
Your Navien installation, handled by iHeat.
Founded by heating engineers, iHeat has a network of over 500 approved boiler installers across England, Scotland and Wales.
Our in-house engineers review installations against our 60-point checklist. Your installation includes commissioning, a demonstration of your controls and registration of your manufacturer warranty.
Meet our engineers
- 1
Find your boiler
Answer a few questions about your home to compare suitable boilers and fixed installation prices online.
- 2
Choose your installation day
Pick an available date and payment option. We review your installation photos and confirm the work before your engineer arrives.
- 3
Get the heating on
Your Gas Safe registered engineer installs and commissions your boiler, then shows you how to use it. Our aftercare team is here if you need help.
Real installations. Real customers.
Hear from iHeat boiler customers about their installation experience.
Boiler installationRickyWatch their story
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Boiler installationPaulWatch their story
Ways to pay.
Pay in full or compare boiler finance with V12 Retail Finance.
Pay in full
Credit or debit cardPay for your installation without taking out a finance agreement.
0% APR
12 or 24 monthsInterest-free options on selected boilers and plans, with deposits from 0% to 50%.
9.9% APR representative
36 to 120 monthsChoose 36, 48, 60 or 120 months. Interest increases the total amount you repay.
Representative example
Illustrative boiler finance example, not the price of a Navien model: cash price £1,945; deposit £0; amount of credit £1,945; 9.9% APR representative; fixed annual borrowing rate 9.48%; term 120 months; 119 monthly repayments of £25.14 and a final repayment of £25.78; total interest £1,072.44; total payable £3,017.44; fees £0.
Credit is subject to status, affordability and lender approval. Available plans depend on your boiler and package. LeadsUK Ltd trading as iHeat is a credit broker, not a lender.
Compare boiler finance options and termsFind your Navien boiler.
Compare suitable models, installation prices and ways to pay.
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