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What size radiator do I need when taking into account 'BTU'?
The size of radiator you need is based on calculating your space in cubic feet or metres and then using a simple BTU calculator (read our post to understand what BTU is) to then take this power output amount and find radiators that comfortably deliver at that level. From replacing one existing radiator to fitting an entire new central heating system, selecting the optimum configuration and size of your radiators might not seem like an overly difficult task. The benefits of spending some time in buying radiator ensures that (a) you calculate the amount of heat that your room needs and (b) you contribute to the interior design and overall balance of your room.
What size radiator do I need for my hallway?
Target temperature: 18°C
- BTU example for a house with double glazing: (length 4m x width 2m x height 2.4) multiplied by 81 = 1555
- Within a house, heat loss incurred through doors can be anywhere between 5% and 15%, so your entrance hallway can be a key contributor to this. To mitigate against losing too much heat in this area of the house, it is a common recommendation to have a slightly lower temperature in your hallway and stairs areas.
What size radiator do I need for my living room?
- Target temperature: 21-22°C
- BTU example for a house with double glazing: (length 5m x width 3m x height 2.4) multiplied by 135 = 4860
For many house owners, consistently heating their living room at a higher temperature is common because it is the space that we spend most time in. Other than windows, consider where your sofas would be placed, your TV and anything else like floor standing lamps. If possible, don’t have radiators placed behind sofas because this is obviously less heat efficient. If you have a living room that measures more than 6 metres in any one direction, then you may want to consider more than one radiator to distribute the heat evenly. If you have a more compactly shaped or narrow living room, consider the space efficient use of a vertical radiator, which have a dramatic aesthetic impact on any room. This may help you position a second radiator within a small corner or on an inverted corner wall of your living room.
What size radiator do I need for my kitchen?
- Target temperature: 16°C
- BTU example for a house with double glazing: (length 3m x width 4m x height 2.4m) multiplied by 81 = 2332
Due to having an oven in a kitchen, you need a radiator that you can quickly power down and typically set at a level slightly lower than other rooms. For this reason, you could consider looking at an electric radiator which would give you the versatility of powering up and down quickly. Through the winter, program a low level of heat output through the evening to make the beginning of your day more comfortable. Of course, the brief changes if you have an open plan kitchen that is more of a living area – in which case you might want to invest in 2 radiators set apart to evenly distribute the heat.
What size radiator do I need for my bedroom?
- Target temperature: 15°C
- BTU example for a house with double glazing: (length 3m x width 4m x height 2.4m) multiplied by 108 = 3110.4
Target temperature for a bedroom is lower to make sleep more comfortable and allowing for heat rising in multi-story homes. Placement for radiators in bedrooms can work particularly well underneath a window so that you save on space to allow your interior design and furniture placement to work well. What size radiator do I need for my bathroom? Target temperature: 23°C BTU example for a house with double glazing: (length 3m x width 3m x height 2.4m) multiplied by 121.5 = 2624.4 It is common for homeowners to keep bathrooms a little on the cold side but go for more heat and a benefit will be minimising any potential damp build up issues. Heated towel rails are now a widely used option for smaller bathroom suites. For medium to large bathrooms, having a towel rail plus small central heating radiator is popular.