Conservatory Radiator Size Calculator

Room Volume (V) in cubic meters:



Watts Required per Cubic Meter (W):





Required Radiator Size (R) in Watts:



A conservatory is a great addition to any home, but keeping it warm during colder months can be a challenge. The Conservatory Radiator Size Calculator helps you determine the appropriate radiator power needed to maintain a comfortable temperature in your space. This ensures efficiency and cost-effectiveness when choosing a heating system.

Formula
The formula used in this calculator is R = V × W, where R is the required radiator size in watts, V is the volume of the conservatory in cubic meters, and W is the required watts per cubic meter for heating.

How to use
To use the calculator, enter the total volume of your conservatory and the recommended watts per cubic meter (which typically ranges between 60 and 100, depending on insulation). Click “Calculate” to see the total radiator wattage required for effective heating.

Example
If your conservatory has a volume of 40 cubic meters and you estimate that 80 watts per cubic meter are needed for heating, the calculation would be:
R = 40 × 80 = 3200 Watts
This means you would need a radiator or a combination of radiators totaling 3200W.

FAQs

  1. What does this calculator do?
    It calculates the radiator size needed to heat a conservatory based on its volume and heating requirement per cubic meter.
  2. How do I measure my conservatory’s volume?
    Multiply the length, width, and height of the conservatory to get the volume in cubic meters.
  3. What value should I use for watts per cubic meter?
    It typically ranges from 60 to 100 watts per cubic meter, depending on insulation and location.
  4. Is this calculator accurate?
    It provides a reliable estimate, but always consult a professional for final decisions.
  5. Can I use this for other rooms?
    Yes, it works for any room where volume-based heating estimates are needed.
  6. Does the calculator factor in insulation?
    Not directly. You should adjust the watts per cubic meter value based on insulation quality.
  7. Should I round up the result?
    Yes, it’s better to slightly overestimate to ensure sufficient heating capacity.
  8. Can I use multiple radiators?
    Absolutely. Divide the total wattage across two or more radiators if needed.
  9. What if my conservatory has lots of glass?
    Use a higher W value (90–100) to account for greater heat loss.
  10. Is the result in kilowatts or watts?
    The result is in watts. Divide by 1000 to convert to kilowatts.
  11. Can this help lower energy bills?
    Yes, using the correct radiator size improves heating efficiency.
  12. Is this calculator suitable for underfloor heating?
    Not specifically, but the total heat requirement it calculates can guide underfloor system sizing.
  13. Can this be used in the summer?
    No, it’s for cold-season heating purposes.
  14. What happens if I undersize the radiator?
    Your conservatory may remain cold and your system may overwork.
  15. Can I factor in external wall exposure?
    Yes, by choosing a higher W value if your conservatory is more exposed.
  16. What type of radiator should I use?
    Panel radiators or convector radiators are commonly used in conservatories.
  17. How can I improve accuracy?
    Consider factors like insulation, window glazing, and sun exposure when selecting W.
  18. Should I include furniture in volume calculation?
    No, use the actual air volume of the room, not occupied space.
  19. Does ceiling height matter?
    Yes, higher ceilings increase the volume, which increases heating needs.
  20. How often should I recalculate?
    Recalculate if you renovate, change glazing, or improve insulation.

Conclusion
The Conservatory Radiator Size Calculator is a simple yet powerful tool to help you choose the right heating solution. By estimating your conservatory’s heating needs accurately, you can maintain comfort, avoid energy waste, and ensure your space is usable year-round.