Hi Karen,
Thanks for your question.
The Eko Fires 4010 requires a builder's opening (the hole in the fireplace surround into which the fire will inset) of height: 550mm min/575mm max., opening width: 400mm min/440mm max. and mounting depth: 125mm. This is considered suitable for a standard 16x22" opening.
It is designed for installation into Pre Cast flues which usually have a ridge tile on the roof (Class 2), or Pre Fabricated metal chimneys (Class 2).
Based on the sizes provided for the currently installed fire, it is possible that the current fire is also a standard 16x22", the internal measurements taken from the front of the fire not always being indicative of the inset sizes behind/size of the builder's opening. This being said, we would highly recommend confirming this with a registered gas installer so that they can inspect this and confirm suitability,
We hope that this helps. Please feel free to contact our sales team via 0161 376 4181 or email
[email protected] if you need any other advice or assistance