Best Boiler For A 2 Bedroom House

Last updated: November 15, 2023

Choosing the perfect boiler for your home can help you meet hot water and heating demands while reducing your energy costs and carbon footprint.

With so many choices available on the market, we’ve created this guide to help you make a suitable choice for your heating needs.

Which Is The Best Boiler For A 2 Bedroom House?

The most commonly used boiler for two-bedroom houses in the UK is the combi or combination boiler.

It can provide both your heating and hot water from a single unit, typically wall hung.

You can get more than enough heating and hot water from a combi boiler for a two-bedroom house with one bathroom and less than ten radiators.

Why Combi Boilers Are Best for Smaller Homes

Combi boilers are designed to be highly efficient at concurrently providing central heating and heating the water in your home.

The compact size of a combi boiler makes it ideal for a two-bedroom house that may have limited space.

Combi boilers get water directly from the mains water supply.

The fuel is burned to produce heat, which is transferred from the combustion chamber to the water through the heat exchanger.

They can provide instantaneous hot water without separate water cylinders or tanks, making them easy to install and less likely to take excessive space.

Wondering how much a new boiler costs? Check out our guide on options available if you need a new boiler but can’t afford it, as well as boilers on finance and government boiler grants here.

Advantages Of Combi Boilers

  • Efficient and Economical

Combi boilers produce condensation to ensure more energy is used rather than wasted.

Only the water you use is heated, and you can potentially make huge savings on your energy bill.

  • Compact
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Combi boilers come in compact sizes with everything they need packaged in one.

They’re designed to fit in small spaces like your kitchen cupboard, making them ideal for properties with limited space.

  • Clean and Quiet

Combi boilers get water directly from the mains supply, making it less likely to accumulate debris or sludge.

This helps prevent issues like kettling, which is the whistling noise some boilers make and can seriously disturb the peace in your household.

  • Hot water on demand

Combi boilers instantly heat the water you need, so you don’t have to worry about having enough water in the hot water storage tank or running out.

  • Can boost your home’s appeal

You can add the numerous advantages of a combi boiler to your list of selling points if you ever wish to sell your home.


A few drawbacks to consider include:

  • Reliant on water pressure

The combi boiler only heats water from the mains, so it may not work well if the mains’ water pressure is low.

  • Limited flow rate

Hot water can only be directed to the central heating or the water outlets but never both simultaneously.

When two or more outlets are in use simultaneously, the water flow rate is reduced, making combi boilers unsuitable for larger properties and those with multiple bathrooms.

Choosing The Right Boiler For A 2 Bedroom House

Consider the following when choosing the right boiler for the central heating system of your two-bedroom house:

Boiler Size

The boiler size typically refers to the power output of the boiler measured in kilowatts (kW).

The right boiler will depend on the number of bathrooms and radiators in your home.

A two-bedroom house is likely to have one bathroom and around four radiators.

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The smaller the property with fewer bathrooms and radiators, the less power you need, and the bigger the property with more bathrooms and radiators, the more power you need.

The most suitable boiler size for a two-bedroom house is 24 to 27 kW.

It can easily run up to 10 radiators and comfortably supply hot water to one bathroom at mains pressure.

Learn all about the different types of boilers, including condensing boilers, LPG boilers, oil boilers, Opentherm boilers and calculating boiler size in our guide.

Boiler Efficiency

Boiler efficiency relates to how much energy the boiler can transfer to usable energy compared to how much is wasted in the process.

An inefficient boiler will waste energy and increase your utility bills. An A-rated high, efficiency boiler can save you up to £300 yearly.

All modern combi boilers are highly efficient and can reach up to 98% efficiency thanks to condensing technology.

The closer the rating is to 100%, the better for the environment and the more savings you make on heating bills.

How old is your boiler? Should you consider a boiler repair or start looking at the latest boiler prices? It’s no secret that boiler efficiency deteriorates over time.

Fuel Type

Combi boilers can use different types of fuel, including gas, oil, liquid petroleum gas (LPG), or electricity.

Natural gas is the most commonly used boiler fuel in the UK as most homes are connected to the national gas grid network, making it quick and easy to install.

They’re considered the cheapest and cleanest option compared to other fossil fuels.

Oil is considered a cost-effective alternative if your home isn’t connected to the gas grid.

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It comes with some difficulties, like storing oil in an external tank and planning for refills to ensure your supply doesn’t run out.

LPG is a combined product of oil extractions and natural gas and can be a cheaper and cleaner option than oil.

More manufacturers now produce LPG-compatible boilers, giving you more choice if you can’t access the grid.

Electric boilers are considered the most energy-efficient boilers because there’s no waste when the electricity heats the water.

However, they’re more costly to run and can drive up your energy bills.

New boiler cost guides:

The Best Combi Boilers For A 2 Bedroom House

Worcester Bosch 2000 25kW combi boiler

  • A-rated with an ErP rating of 93%.
  • Incredibly quiet.
  • Removable side panels for easy access.
  • Compact and can fit small spaces.
  • Quick to install.

Viessmann Vitodens 050-w 25kW combi boiler

  • A-rated with an efficiency of 92%.
  • Excellent price to performance ratio.
  • Low operating noise.
  • Internet capability with WiFi inside for smart thermostats.
  • Compact.

Alpha E-Tec 28kW combi boiler

  • A-rated.
  • Highly durable and efficient.
  • Zinc-plated vessel to protect against corrosion.

Ideal Logic C24kW combi boiler

  • A-rated.
  • Compact and stylish cupboard fit.
  • User-friendly and easy to operate control panel.
  • In-built frost protection.

Best boiler for a 2 bedroom house Final Thoughts

A combi boiler size of 24-27 kW will work best for your two-bedroom house and can help you save on energy bills.

Combi boilers are very efficient, quiet, and compact, making them ideal for smaller homes.

We also covered the boiler brands to avoid and the most reliable boilers currently available.