Constructional Hearth For Cassette Fire

[sparkypenguin]

Hi all,

I'm currently building a house and the downstairs living room is going to have a media style wall with an in built raised fireplace and I'm hoping for some help regarding constructional hearth requirements.
I've looked at the installation manual, read through the building regs, searched this forum, used AI, but cannot find the info I need.

The fire is a Inset Cassette Stovax Studio 2 and the finished design is going to be something like this...

Would the constructional hearth be located at floor level in this design and if so would my 150mm concrete floor act as the constructional hearth?

Any help would be much appreciated.

Kind regards,
Mark.

 

[sparkypenguin]

I've managed to get answers direct from techincal guys at Stovax and if it helps anyone else here they are..
The constructional hearth would be located at floor level and a concrete floor of 125mm would suffice.
Also note that the image in the post does not comply with the installation instructions as no combustible material is allowed below within 600mm of the bottom of the fire.

Mark.

 

[cdbe]

As you're now the forum expert, did you explore the height of your telly above the fire? I'm planning on having exactly the same Stovax and want the TV above it.

Thanks.

 

[sparkypenguin]

Expert

Yes I did, I've spent quite a bit of time over the last week looking into my design including having a TV above and taking into account all of the manufacturers installation parameters I'm currently struggling to make it work.
When I spoke to the technical people at Stovax they advised me against putting a TV above it before I even mentioned it.
This is due to the amount of heat that the 8.5kW fire will put out.
However as my room layout prevents the TV from going anywhere else I've been looking into using heat shields to make it possible.
My room is approx. 2500mm in height and I was planning for a 75" TV.
Even with the fire place being placed very low to the floor and using heat shields the top of my TV is almost at ceiling height.
That being said I am currently trying to track down a HETAS registered engineer to see if we can design something that can be approved.

Have you downloaded a copy of the installation manual from Stovax?
I have both the current manual and an older copy which is actually more detailed and helpful.
I may be able to help if you can confirm the height of your room, the planned height of the top of the fire, the size of your TV and any mantel information.

 

[cdbe]

Hi, my ceiling is about 2.5m, TV 100". It's a flat wall - the fire will be as low as reasonably possible and boxed in, so a thing like your picture but stopping just above the fire with the TV mounted on the original wall so about 5-600mm behind the front of the fire which should help, as may using the warm air outlets to send some of the heat out the sides in to the room.

 

[sparkypenguin]

I don't think I mentioned this but my fire and the info I am giving is based on the wood burning version.
Also just to mention that I only started to look in to this last week and obviously any advice I give should be checked by a HETAS engineer as I am certainly no expert .

So assuming yours is also the wood burner version and that the TV is a standard OLED/LED and not a laser projector then.....
Relevant to your design and according to the installation manual the fire box is 350mm deep and you need a 100mm void behind and above the fire to a height of 900mm so this would require the front of your TV to be at least 450mm behind the front of the fire.
So your design appears to tick these boxes as long as the TV does not protrude into this 100mm void.
However, what about the flue, where is this going to go, what type is it?

 

[cdbe]

Thanks, don't worry I was being slightly tongue in cheek about your "professional" expertise, its just handy to run things by someone in a similar position.
Mine also a wood only. Flue will be rigid twinwall and through the wall as soon as possible after it exists the fire.

 

[sparkypenguin]

The twin wall flu has quite a few rules of its own.
I got stovefitterswarehouse.co.uk to do a design for me.
It's free and they give you a complete parts list.
They're also about the cheapest about so likely I will be buying my stuff from them.