Rytons Open Fire Ventilation Calculator

Open Fire Ventilation : Good to Know
  • Open fires require a considerable amount of air to burn safely and efficiently.  Under-ventilating produces an incomplete combustion resulting in the production of carbon monoxide, plus the spillage of smoke and fumes into the room.
  • All our ventilators have an equivalent area calculation as required by Part J of the Building Regulations.
  • The calculator is for open fire installations in the UK and uses the ventilation requirements of the Building Regulations Part J to generate results.
  • We have assumed the air vent will be in the same room as the fire and positioned to access directly to the outside.
  • To get started input a few details about the fire and the property into which it is to be installed.  Hit the Calculate button and a list of suitable ventilators will be generated.
Make a Calculation:
Appliance Type:   
Flue or Throat Shape:    Rectangular Flue or Throat
Circular Flue or Throat
Flue or Throat Size:
  mm Wide x mm Deep

  1. Notices
    • Rytons reserve the right to improve specifications from time to time without prior notice.
    • All information is given in good faith and to the best of our knowledge is true and accurate, however no guarantee regarding its accuracy is given, nor should Rytons representatives or agents imply any such guarantee.
    • Customers should satisfy themselves that the products are suitable for the intended purpose.
    • Since delivery dates, the use of products and management of the labour involved is outside our control, no warranty is given nor should any warranty be implied by Rytons representatives or agents.
    • Calls to and from Rytons are recorded and may be monitored to help us maintain and improve our service.
    • ® Registered Trademark of Rytons Building Products Ltd. © Copyright Rytons Building Products Ltd 2016.
    • Full Terms & Conditions of Sale available here.
    • Rytons Building Products Ltd Design House, Kettering Business Park, Kettering, Northamptonshire NN15 6NL.
    • Registered in England 1058924.
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