Ventilation Regs:MVHR: Stoves

john_cappa

If I fit a room sealed stove (with its own external air supply via the floor and foundation) and have MVHR is any further ventilation required for the room for the stove according to the regs?

DGOBS

does the manufacturer require cooling air? RTFM
The regulations will not specify for specific appliances

john_cappa

My question has nothing to do with te applianc. If you have no MVHR in a house then by the regs you require a vent in any room with a stove or other fuel burning device?

Obviously with MVHR installed and high airtightness you can't have a vent in the wall so I am just questioning what you do instead?

Robbie.G

john_cappa wrote: »

My question has nothing to do with te applianc. If you have no MVHR in a house then by the regs you require a vent in any room with a stove or other fuel burning device?

Obviously with MVHR installed and high airtightness you can't have a vent in the wall so I am just questioning what you do instead?

What ever you need to know is here

http://www.environ.ie/en/Publications/DevelopmentandHousing/BuildingStandards/FileDownLoad,1650,en.pdf

Your installer or architect should be able to answer that question fit you is that why they get the big bucks

john_cappa

Robbie.G wrote: »

What ever you need to know is here

http://www.environ.ie/en/Publications/DevelopmentandHousing/BuildingStandards/FileDownLoad,1650,en.pdf

Your installer or architect should be able to answer that question fit you is that why they get the big bucks

I am sure it is (did they even have MVHR in 1997?) but I am hoping someone can give me a simple two line answer.

Robbie.G

john_cappa wrote: »

I am sure it is (did they even have MVHR in 1997?) but I am hoping someone can give me a simple two line answer.

The simple answer is a stove must have a vent.The rooms needs a min of 6500sqmm ventilation.The building regs might be from 1997 but they are the regs.
MVHR systems are not designed to provide combustion air. Where open flue appliances are installed permanent dedicated combustion air supply is required.
Note: The pressure differences within MVHR can easily exceed those within an open-flued appliance. This extends to fan-flued biomass and other solid fuel appliances; although the fan will probably be sufficient to overcome any pressure discrepancies when operational, upon switching off the fan the smouldering fire bed may be reignited and/or spill into the room because of the pressure difference caused by the MVHR.
Does your stove comply with building regs I can't answer that only the manufacturer can.

john_cappa

The stove will be room sealed and have its own dedicated external air supply so will not need a vent to provide combustible air.

If a vent is required how can people with MVHR achieve air tightness to make it actually worthwhile?

Robbie.G

john_cappa wrote: »

The stove will be room sealed and have its own dedicated external air supply so will not need a vent to provide combustible air.

If a vent is required how can people with MVHR achieve air tightness to make it actually worthwhile?

Have a look here you might find what your looking for.
http://www.boards.ie/vbulletin/showthread.php?t=2056869471

DGOBS

Combustion air is directly from outside (room sealed boiler) so the manufacturers instructions are vital, check in it under cooling air etc.
If your MVHR supplies as per building regs (as it should) see Part F for details, and the MI say no extra cooling air is required, then it's fine.


Simple answer
2 lines

shane0007

DGOBS wrote: »

Combustion air is directly from outside (room sealed boiler) so the manufacturers instructions are vital, check in it under cooling air etc.
If your MVHR supplies as per building regs (as it should) see Part F for details, and the MI say no extra cooling air is required, then it's fine.


Simple answer
2 lines

Are we not talking about a stove here & not a boiler therefore stove will not require cooling air, only air for combustion through it's balanced flue.

DGOBS

any appliance may require cooling air, thats why I said check the MI, most likely they will say no, not required or not mention it at all except for air gaps to combustable materials for offset (hearth) types

dathi

TGD part J 1.2 each appliance should be (a) room sealed or (b) contained in a room or space which has a permanent ventilation opening. there is your two line answer;)