Rated 5 stars on Reviews.io


Free delivery on all orders


Limitless, free returns


Radiators from £19


Trees planted for every radiator sold

How to Choose the Right Radiator Size

How to Choose the Right Radiator Size

Choosing the right radiator size for your home can be difficult, particularly if you'd like to make sure your preferred radiator style suits the decor of each room. Not only do you need to think about the way your radiator looks, but you also need to consider the surface area of each room and your BTU (British Thermal Unit) requirements. 

There's nothing to worry about though, as UK Radiators are here to help. We're experts at what we do, priming us perfectly to give you all the advice you could ever need to know about the world of radiators. 

If you'd like a little more guidance before making a purchase, please get in touch with our expert team here.

Assessing Your Heating Needs

Before deciding which size radiator you should purchase, it's important to assess your heating needs. 

You need to consider the following things:

  • Your desired heat output
  • Your BTU requirements 
  • Your location and the average temperature in your area
  • The style and decor of your home
  • The size of your home and the rooms inside it
  • How often each room is used
  • Your personal heating preferences
  • The level of insulation in your home
  • How energy efficient your home is
  • How many windows you have in each room
  • Any other issues that may contribute to heat loss
  • Another factor to consider is whether you have any other sources of heat output within your home. For example, if you have a fireplace in your living room, it's unlikely that you'll require larger radiator sizes in that room. 

    There's a lot to think about, but there's no need to worry, as we hope this guide will help you make your radiator sizing decision much easier. Read on to find out more about choosing the perfect size radiators for your home.

    Calculate Your Desired Heat Output

    The first thing to think about is your desired heat output. Radiators come in various heat outputs (usually measured in watts or BTUs), with larger radiators usually emitting more heat. This means that if you have a larger room or a space with greater heat loss, you'll likely need a larger radiator. 

    If you have a large room to heat, another option is to place several compact radiators around the room, allowing you to target specific areas of your room. On the other hand, you may also find that lower heat output radiators are sufficient for well-insulated rooms with a smaller surface area.

    If you're not sure what your desired heat output is, you may want to use a BTU calculator. A BTU calculator will help you to determine the heating capacity needed for a specific room. Simply enter your room measurements, a few details about the type of room, its size, the number of windows and whether they are single or double-glazed, and the number of internal and external walls. Then, our calculator will do the rest! With an accurate BTU calculation, you can choose the most effective and energy efficient radiator for your room with confidence.

    Learn more about how to size a radiator here.

    Can I Install an Extra-Large Radiator in Each Room?

    You may find yourself wondering whether or not your radiator sizing dilemma can be solved by sourcing the largest radiator possible, installing it within each room of your home. We recommend choosing a radiator that is within a 10% range of your BTU requirements, but we do generally advise that you buy slightly oversized radiators for your room, as both your radiators and your central heating can then be turned down to match your desired temperature. This means that while upfront costs for larger radiators might be bigger, they’re more cost-effective than standard radiator sizes in the long run.

    In addition, if you’re installing a heat pump, oversized radiators are less likely to need to be replaced, saving you some more potential costs further down the line.

    You should also consider any architectural features that could lead to heat loss. For example, if your living room has a bay window, an alcove or high ceilings, heat distribution can be affected. In these cases, you may need to consider either a larger radiator, or several smaller radiators to target these areas.

    Explore Your Room Size and Layout

    Another factor that will influence your chosen radiator sizing is the size and layout of your room. Rooms with a larger surface area with irregular shapes may need larger radiators, ensuring even heating throughout the room.

    A small radiator will struggle to heat a large room effectively, due to the greater amount of space contained within the area. This could lead to more energy wastage and colder indoor temperatures within your home. Larger radiators, on the other hand, are more of an investment piece, but produce more heat making them more economical for larger rooms in the long run.

    In larger rooms, you may require multiple units, instead of going for one large radiator. In these cases, you can divide your optimal BTU between the number of radiators placed in the room. 

    If you'd like more help working out which radiator sizes are best for your home, please get in touch and we'll guide you through our collection.

    Choose the Right Style for Your Home

    When choosing the perfect radiator size for your home, it's also important to think about your home decor and existing furniture. You'll naturally want to ensure that your central heating system matches your taste, and you can install different radiator designs depending on each room.

    At UK Radiators, you have a wide choice of designs available to complement your space, including:

  • Vertical radiators
  • Horizontal radiators
  • Electric radiators
  • Column radiators
  • Towel radiators
  • Anthracite radiators
  • Raw lacquered metal radiators
  • If you prefer a minimalist style or space is at a premium in one room, you may want to install a couple of smaller radiators that blend into the background. Or, if you'd like to go the other way and showcase your radiators as a design feature, you might want to choose a large eye-catching unit with a bold style. Narrow spaces and smaller rooms may benefit from vertical radiators, instead of the more traditional horizontal radiator style. 

    You don't just have to go for traditional white radiators either, as we have a range of other colours on offer, as black column radiators have recently come into style. 

    Whatever style you're trying to cultivate, we're sure we'll be able to help you!

    Consult the Experts at UK Radiators

    By now, you should have a much better understanding of which radiator sizes are most suitable for your home.

    There is no one-size-fits-all situation - instead, your choice of radiator sizing is highly dependent on factors like the size of your rooms, your desired heat output and the layout of your home. Not only do you want a functional solution that keeps your home warm and toasty when needed, but you also want something that adds a dose of style and sophistication to your dwelling. 

    If you're still unsure about which radiator sizes to choose, then your next step should be to contact our experienced team. As experts in the industry, we have all the knowledge you could ever need to discover the perfect size radiators for your home. 

    Get in touch today to discuss your home heating needs.

    Related Posts