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Draft from Insert stove with direct air

  • 30-11-2024 12:10PM
    #1
    ChewyLuey
    Registered Users, Registered Users 2 Posts: 232 ✭✭


    Recently replaced a gas open fire with an insert stove with direct air kit. Chimney was flexi lined in the process. In general it's working well. However whereas I specifically got the external air option to avoid bringing cold air into the room via a wall vent I'm noticing that when the stove is not in use on more windy days there is a considerable draft coming from the front of the stove at the bottom through and around the air controls (enough to flicker and extinguish a nite lite this morning).

    Im not sure if this is coming from the chimney (external masonry chimney)or misrouted air from the air supply but it makes the room less comfortable than before when stove not on.

    The previous gas fire there was never used, gas supply was turned off and I had pushed some drop cloths up the flu to avoid drafts.

    I will make contact with the vendor soon but any opinions of this is simply to be expected or of something is malfunctioning?



Comments

  • #2
    10-10-20
    Registered Users, Registered Users 2, Paid Member Posts: 10,141 ✭✭✭✭10-10-20


    Hi, it might be that the seal at the bottom of the flex flue wasn't closed and the gap is the air traveling between the flue and the original chimney liner material. It would bend my brain if the stove was supposed to be room-sealed and there was a gap like that. They should look into that alright, they might be able to pack the gap with a non-combustible filler.



  • #3
    ChewyLuey
    Registered Users, Registered Users 2 Posts: 232 ✭✭ChewyLuey


    Thank you. If I look through the air controls at the front of the stove I can see a chunk of daylight straight through to the external air permanently open vent on the outside of the chimney with some daylight. So I'm not sure if there is simply a direct route for air through? And of that should actually be the case. (Also It's quite an exposed site and the external vent is facing south west)



  • #4
    10-10-20
    Registered Users, Registered Users 2, Paid Member Posts: 10,141 ✭✭✭✭10-10-20


    https://www.boards.ie/discussion/comment/122904659#Comment_122904659

    Hmm - I would not have thought that there should be any visual path through at all… best have it looked at and explained.



  • #5
    Wearb
    Moderators, Home & Garden Moderators Posts: 6,707 Mod ✭✭✭✭Wearb


    I'd be tempted to contact the manufacturers. If this is a room sealed stove (are you sure it is), what's happening is very odd.



  • #6
    ChewyLuey
    Registered Users, Registered Users 2 Posts: 232 ✭✭ChewyLuey


    The vendor is very reputable so I'll contact him on Monday and talk through it with him. I just got impatient this morning and thought I'd fish for some opinions on it here.

    Attached is the drawing of the rear air supply for the stove model. Arrow shows where I'm getting air into the room

    Screenshot_20241130_140734_Drive.jpg


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  • #7
    ChewyLuey
    Registered Users, Registered Users 2 Posts: 232 ✭✭ChewyLuey


    Another drawing of the rear air supply. It does kind of looks like it's designed to just dump air in the general direction of underneath the stove? Not sure if this is an explanation for getting a draft in the room.

    Screenshot_20241201_161057_Drive.jpg


  • #8
    whizbang
    Registered Users, Registered Users 2 Posts: 2,076 ✭✭✭whizbang


    There are many stoves around that can use normal room air, and also be fitted with an external supply kit: The external air supply is used instead of a hole in the wall vent.

    The external supply connection kit does not close off the airwash and/or secondary air from the room, they are still available for use. I suspect this is what you have. Close these off, but you are still left with the external air supply which you would have anyway if it was a hole in the wall.

    Proper room sealed, External air only stoves are not all that common.



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