What does a new combi boiler cost and what should you look out for?

When replacing or purchasing a central heating boiler, you need to take into account various cost items. The final total price depends on the type of boiler, the installation complexity, the chosen power output, the hot water capacity (CW class), and any extensions such as thermostats or filters.

Below is an overview of the average costs in 2025, including VAT and installation.

1. Purchase and installation costs of central heating boilers

The above prices include installation, disposal of old boiler, connection to existing pipes and standard flue gas discharge.

2. Annual Maintenance Costs

Annual maintenance is legally required for boilers, carried out by a CO-certified installer.

3. Thermostat costs (optional)

4. Additional facilities (optional)

5. Subsidy (only for sustainable systems)

The subsidy will be paid out after installation via RVO. The installer can often help with the application.

6. Total indication complete replacement (example)

For an average single-family home with replacement of an HR boiler, new smart thermostat, dirt filter and maintenance contract:

For a hybrid installation, this total is approximately €4,800 – €5,800, minus any subsidy of approximately €1,800.

Advice via yourquote.nl

The costs for a new central heating system vary greatly depending on the type of house, consumption, comfort requirements and future plans. Via yourquote.nl you will receive several free quotes from certified installers. This way you can easily compare:

• Boiler prices and installation costs
• Maintenance and service packages
• Savings potential and subsidy options

The CW class (Comfort Hot Water class) indicates how much hot water a central heating boiler can deliver per minute at a temperature of 40 °C. The higher the CW class, the more comfort–, but also the higher the price. When choosing a new central heating boiler, the CW value plays an important role in both ease of use and investment.

Overview central heating boiler prices per CW class

Please note: the final price also depends on the brand, power (kW), boiler type (HR, HRe, hybrid), and installation conditions.

What influences the price within a CW class?

• Brand and model: A-brands such as Nefit Bosch, Remeha, Vaillant and Intergas are more expensive than budget brands.
• Type of boiler: A hybrid system with CW5 is more expensive than a standard HR boiler with CW5.
• Installation complexity: Extra costs for flue gas extraction, piping, thermostat or dirt filter.
• Smart thermostat: Can increase the total price by €400 – €600 for CW5–CW6 systems.

Recommended CW class per situation

Advice via yourofferte.nl

Not sure which CW class suits your home? Via yourofferte.nl you will receive several non-binding quotes from recognized installers. You will receive customized advice on:

• Correct CW class for your hot water needs
• Boiler types and brands per budget
• Installation costs and expansion options

The price of a central heating boiler is largely determined by the type of system, the capacity (kW), the hot water capacity (CW class) and the installation conditions. Below are the most common types of central heating boilers with their average price range.

1. High-Efficiency Boiler (HR Boiler)

Description:
Standard and most chosen central heating boiler. Works on natural gas and has a high efficiency (up to 107%).

Application:
All types of homes.

Features:
Heating + hot tap water, reliable, relatively affordable.

Average price including installation:
€1,800 – €3,000

2. HRe Boiler (HR + power generation)

Description:
Works as an HR boiler, but also generates electricity via a micro-CHP (combined heat and power).

Application:
Large homes with high gas consumption (>1,600 m³/year).

Features:
More expensive to purchase, limited application, saves on electricity costs.

Average price including installation:
€4,500 – €6,500

3. Hybrid Boiler (HR + heat pump)

Description:
Combination of an HR boiler and an electric heat pump. Heats with electricity at mild outside temperatures, the boiler kicks in when it's cold or for tap water.

Application:
Homes with sufficient insulation.

Features:
Consumes less gas, ISDE subsidy possible, future-oriented choice.

Average price including installation:
€4,000 – €6,000

4. All-electric heat pump (gas-free system)

Description:
Complete replacement of the boiler. Works entirely on electricity and requires a well-insulated home.

Application:
New construction or existing construction with high insulation value.

Features:
Sustainable, no gas connection required, requires buffer tank or boiler.

Average price including installation:
€8,000 – €14,000

Summary table

Subsidy amounts are indicative based on the ISDE scheme 2025 and depend on device and installation.

Advice via jeofferte.nl

Are you unsure which type of boiler best suits your home, consumption and future plans? Via jeofferte.nl you will receive non-binding multiple quotes from recognized installers. You get a clear insight into:

• Total price per boiler type
• Payback period and subsidy potential
• Installation-inclusive customized solutions

CW4 boilers offer sufficient hot water comfort for an average family. They can usually serve one hot water point well at a time. The price is partly determined by brand, efficiency, modulation technology and any smart functions.

1. Remeha

• Popular model (CW4): Remeha Tzerra Ace 28C CW4
• Price (excl. installation): €1,200 – €1,400
• Features: Compact, modulating, reliable basic option

2. Intergas

• Popular model (CW4): Intergas Xtreme 30 CW4
• Price (excl. installation): €1,300 – €1,500
• Features: Very high efficiency, double heat exchanger

3. Vaillant

• Popular model (CW4): Vaillant ecoTEC pure VHR 25-24/7
• Price (excl. installation): €1,400 – €1,600
• Features: German quality, quiet, reliable

4. Nefit Bosch

• Popular model (CW4): Nefit ProLine NxT HRC 24 CW4
• Price (excl. installation): €1,300 – €1,550
• Features: A-brand, compact, economical

5. ATAG

• Popular model (CW4): ATAG i28CZ CW4
• Price (excl. installation): €1,400 – €1,700
• Features: Premium components, quiet operation, suitable for modulating thermostats

6. Ferroli

• Popular model (CW4): Ferroli BlueSense 4
• Price (excl. installation): €1,000 – €1,200
• Features: Budget-friendly, simple technology, less extensive control technology

Summary Price Table (CW4 Boilers, 2025)

Prices are indicative and may vary based on supplier, warranty options, and promotional models.

Advice via jeofferte.nl

Are you unsure which brand or model best suits your home? Via jeofferte.nl you will receive several non-binding quotes from recognized installers. You get insight into:

• Comparison between A-brands and affordable alternatives
• Total costs including installation and thermostat
• Optional maintenance contracts and warranty conditions

When installing a new central heating boiler, you will often incur extra items in addition to the basic costs. These are sometimes technically necessary (e.g. new flue gas discharge), and sometimes optional (e.g. smart thermostat or dirt filter). Below are the most common additional cost items, including guide prices (incl. installation and VAT).

1. Replace flue gas discharge

New high-efficiency boilers almost always require a new concentric flue gas discharge according to current safety standards.

• Estimated price: €150 – €400
• Mandatory when replacing boiler

2. Smart or modulating thermostat

A modern boiler works most efficiently with a matching thermostat. A smart thermostat increases comfort and saves energy.

3. Dirt filter or sludge separator

Prevents contamination of the heating system. Extends the life of the boiler and prevents malfunctions.

• Estimated price: €150 – €300
• Recommended for new installation or connection of underfloor heating

4. Meter cupboard adjustment (hybrid or all-electric)

For hybrid installations or heat pumps, sometimes an extra group or adjustment in the meter cupboard is required.

• Estimated price: €200 – €350
• Depending on existing electrical infrastructure

5. Hot water boiler (with heat pump without central heating boiler)

With all-electric systems, a separate boiler or buffer vessel is required for hot tap water.

• Estimated price: €800 – €1.500
• Required for heat pumps without combi function

6. Radiator replacement or expansion

When switching to low-temperature heating or replacing old radiators.

7. Removal and disposal of old boiler

Sometimes included, sometimes as a separate item on the quote.

• Estimated price: €50 – €100

8. Connecting or expanding underfloor heating

Optional with replacement or sustainability.

9. Control technology or adjustment

Hydraulic balancing or expansion of control for larger installations or zones.

• Guide price: €200 – €500
• Saves energy, prevents temperature differences

Summary of additional costs (indicative)

Advice via jeofferte.nl

Curious about which additional costs apply to your home? Via jeofferte.nl you will receive non-binding offers from recognized installers. You get insight into:

• Which costs are mandatory, recommended or optional
• Complete price structure per boiler type
• Technical and financial customization

The costs for a central heating boiler and associated installation vary per situation. The total investment depends on technical requirements, property characteristics, system choice and comfort wishes. The following factors jointly determine the final price.

1. Type of central heating boiler

• HR boilers are the most affordable to purchase and install.
• HRe boilers and hybrid systems are more expensive, but offer more energy savings or sustainable operation.
• All-electric systems require larger adjustments and higher investments.

Price differences: ± €1,800 (HR) to ± €14,000 (all-electric, incl. boiler and installation)

2. CW class (Hot water capacity)

• The higher the CW class (e.g. CW5 or CW6), the more hot water the boiler delivers per minute.
• Boilers with a higher CW class are more expensive to purchase and often heavier in terms of power.

Estimated price difference CW3 versus CW6: average €1,000

3. Required installation and adjustment work

• Replacement of the flue gas discharge system (often required for replacement)
• Adjustment of pipes, radiators, gas or water connections
• Electrical facilities (for hybrid or all-electric)

Installation costs: €500 – €2,000 depending on complexity

4. Thermostat Choice

• Simple on/off thermostats are inexpensive.
• Modulating or smart thermostats increase the price, but save energy in the long run.

Extra costs for smart thermostat: €400 – €600 (including installation)

5. Brand Effect and Product Line

• A-brands (such as Nefit Bosch, Remeha, Vaillant) have higher base prices than budget brands.
• Within a brand, prices vary per model series and power.

Brand-specific price difference: up to €1,000 between base model and premium line

6. Housing Type and Insulation Level

• Poorly insulated homes require more powerful boilers or extra provisions.
• Well-insulated homes are suitable for hybrid or all-electric systems.

Influence on: required CW class, type of boiler, delivery system (radiators/underfloor heating)

7. Choice of additional options

• Dirt filters, sludge separators, zone heating, buffers, or domestic hot water boilers increase the investment.
• These options improve comfort and energy efficiency, but require extra material and labor.

Extra costs: average €200 – €1,500, depending on choice

8. Subsidy or financing

• For hybrid systems or heat pumps, a subsidy can be applied for via the ISDE scheme.
• This significantly reduces the net investment, but the subsidy is only received afterwards.

ISDE subsidy 2025: average €1,800 – €3,000 (depending on system)

9. Regional differences in labor costs

• Hourly rates of installers vary by region.
• In urban areas or with high demand, assembly costs can increase.

Regional difference: ± €200 – €400 on total price

10. Number of systems or spaces

• When installing multiple radiators, zones or underfloor heating groups, the total price increases, but the price per unit decreases.

Economies of scale possible for larger installations or renovation projects

In summary: these factors determine the total price

Advice via yourofferte.nl

Do you want insight into the exact costs for your home and situation? Via yourofferte.nl you will receive several non-binding offers from recognized installers. Including:

• Detailed price breakdown
• Comparison of boiler types and brands
• Estimate of installation costs and savings potential

Central heating is responsible for the largest part of the energy consumption in the house. Smart use of your heating system and some targeted adjustments can reduce energy costs structurally, without loss of comfort.

1. Have the boiler properly adjusted and maintained

• Annual maintenance prevents malfunctions and ensures that the boiler remains efficient.
• A properly adjusted boiler consumes less gas and delivers higher performance.

Savings: up to 5% on an annual basis

2. Opt for a modulating or smart thermostat

• A modulating thermostat accurately adjusts the boiler's output to the heat demand.
• Smart thermostats automatically lower the temperature when absent or at night.

Savings: 10–15% on gas consumption

3. Lower the flow temperature of the central heating boiler

• With good insulation, the central heating boiler can usually be set to 55–60 °C instead of 80 °C.
• This increases the efficiency of HR boilers and makes the system suitable for future heat pumps.

Savings: 5–10% without loss of comfort

4. Have the system hydraulically balanced

• This ensures that all radiators receive exactly the right amount of warm water.
• It prevents temperature differences in the house and ensures more efficient heat distribution.

Savings: up to 10% per year

5. Insulate affordably where possible

• Cavity wall, floor and roof insulation significantly reduce the heat demand.
• The less heat loss, the less the boiler has to work.

Savings: depending on the type of house, but can amount to hundreds of euros per year

6. Install a dirt filter or sludge separator

• Dirt in the system causes loss of efficiency and malfunctions.
• A filter prevents damage to the pump and heat exchanger.

Costs: approx. €150 – €300
Savings: less energy loss and lower maintenance costs in the long term

7. Ventilate Strategically

• Fresh air is important, but don't leave windows open unnecessarily long in the winter.
• Use tilt windows or ventilation grilles instead of prolonged opening.

Savings: prevents unnecessary heat loss

8. Turn down the heating in rooms you don't use

• Close interior doors and set radiators in unused rooms to the frost setting or lowest setting.
• However, avoid completely shutting off radiators in well-insulated homes (risk of freezing or imbalance).

9. Install radiator foil and thermostatic valves

• Foil behind radiators against exterior walls prevents heat loss.
• Thermostatic radiator valves locally control the desired temperature.

Costs: low, effect noticeable

10. Consider a hybrid heating system

• A hybrid boiler consumes up to 60% less gas thanks to the use of an electric heat pump at mild outdoor temperatures.
• Thanks to ISDE subsidy, the payback period is attractive.

Subsidy in 2025: average €1,800
Saving: approx. €300 – €500 per year (depending on home and usage)

Savings advice via jeofferte.nl

Want to know which measures will yield the most for your situation? Via jeofferte.nl you will receive free and non-binding offers and savings advice from certified installers. You get insight into:

• The best combination of boiler, control and insulation
• Estimate of your annual savings
• Payback period and subsidy options