I have replaced doors in my house and would like to replace a plain boiler cupboard door — standard 1981mm x 762mm (6½ft by 2½ft) door — with a 6-panel door matching the others.
The thing is that the boiler is a natural gas condensing combi boiler and therefore needs vents?
The current door has a 225mm x 150mm (9in x 6in) louvred vent at the top and bottom of the door and these won't fit aesthetically within the panelling of the door. However, I could fit two 9in x 3in louvred vents at the top and bottom to match the amount of ventilation.
Seeing as the boiler (a Potterton Promax Ultra Combi 28 ErP) is much newer than the central heating boiler previously fitted and the new boiler is fitted with a flue expelling exhaust gases outside the building, is ventilation actually needed any more? I cannot seem to find any information on it online.
If it is still required, how large is ventilation needing to be?
Best Answer
Page 16 of the boiler installation guide PDF (Section 7.3 - Ventilation of Compartments) points out that no air vents are required in cupboards or compartments with your boiler.
This is because although the boiler requires oxygen in order to burn the gas correctly, your boiler has a double walled (balanced) flue and takes in all the air it needs through the outer part of the flue, drawing the oxygen it needs from outside the building.
See this OFTEC page for more information on balanced flues and cupboard air venting.