Heating, insulation, ventilation, VMC, cooling ...Can we insulate a hearth with an insert?

Heating, insulation, ventilation, VMC, cooling ... short thermal comfort. Insulation, wood energy, heat pumps but also electricity, gas or oil, VMC ... Help in choosing and implementation, problem solving, optimization, tips and tricks ...
marnie59940
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Can we insulate a hearth with an insert?

Unread Messageby marnie59940 » 28/09/20, 13:01

Hello

We had a wood stove installed in the old fireplace of our house, for financial cost we opted for this system (and had the duct tubed). but is it possible to put a reflective film on the old bricks, behind and on the side, because frankly there is a lot of heat loss and the room does not heat up.

thank you very much for your answers, i am really new to all of this.

Marie
(sorry I don't know how to insert an image!)
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Re: Can we insulate a hearth with an insert?

Unread Messageby ENERC » 28/09/20, 14:33

marnie59940 wrote:Hello

We had a wood stove installed in the old fireplace of our house, for financial cost we opted for this system (and had the duct tubed). but is it possible to put a reflective film on the old bricks, behind and on the side, because frankly there is a lot of heat loss and the room does not heat up.

thank you very much for your answers, i am really new to all of this.

Marie
(sorry I don't know how to insert an image!)

Hello,

No, on the contrary, hot air must be allowed to pass around the stove to diffuse the heat in the room.
Me, I cut the plaster of the hood of the old fireplace in several places so that the air circulates as much as possible. I put black painted steel grilles for aesthetics.
As little hot air as possible goes into the chimney. If the tube is smaller than the duct, the space should be sealed with plaster or heat resistant insulation.
At home, the back wall heats up but it heats the kitchen through the wall.

The key is to cool the stove and the flue as much as possible before it goes through the ceiling.
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Re: Can we insulate a hearth with an insert?

Unread Messageby Christophe » 28/09/20, 15:08

marnie59940 wrote:Marie
(sorry I don't know how to insert an image!)


Welcome here!

Use the Attachments function below the edit window
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Re: Can we insulate a hearth with an insert?

Unread Messageby marnie59940 » 28/09/20, 15:18

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Re: Can we insulate a hearth with an insert?

Unread Messageby Christophe » 28/09/20, 15:25

Ah yes beautiful fireplace!

How is it partitioned in the duct ???

You can very well put thin insulation on the walls of the fireplace (at least the bottom) ...

As they work with IR it will work quite well (you can always double 5-6 cm of classic insulation behind like extruded polystyrene)

In the brico there is insulation of this type to put behind the radiators (but per m2 it is quite expensive ... better to buy a roll)

Also you can simply move the stove forward (a good 50 cm visibly) ... just 2 more elbows ... or 1 if it has a rear exit?
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Re: Can we insulate a hearth with an insert?

Unread Messageby sicetaitsimple » 28/09/20, 16:14

Christophe wrote:How is it partitioned in the duct ???


Is that the first question? Was it at least clogged around the metal tubing?
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Re: Can we insulate a hearth with an insert?

Unread Messageby marnie59940 » 28/09/20, 17:08

Thank you for your answers.

no, the man who cased the chimney (a pro), did not close around the casing, he is above the stove. He did not suggest that we make a bent tube to move the stove forward. :( maybe the base of the old chimney is a little too fragile to support the weight of the stove.

I will see with someone to close the contour around the casing (with plasterboard that would be fine?)

and I will see to put a reflector (as for the radiator behind.)

thanks for the ideas.
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Re: Can we insulate a hearth with an insert?

Unread Messageby Ahmed » 28/09/20, 19:31

If it is often convenient to have a stove in the hearth of a fireplace, it is not however favorable to the heat exchanges which are the raison d'être of this device. Note that if the combustion has experienced strong improvements, at least on the best devices, this is much less true with regard to the other important factor which is the exchange capacity. It is true that this would imply an additional volume costly to achieve and not necessarily adapted to the wishes of the users (not very sensitive to this rather discreet technical aspect) ...
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Re: Can we insulate a hearth with an insert?

Unread Messageby sicetaitsimple » 28/09/20, 20:13

marnie59940 wrote:no, the man who cased the chimney (a pro), did not close around the casing, he is above the stove. He did not suggest that we make a bent tube to move the stove forward. :( maybe the base of the old chimney is a little too fragile to support the weight of the stove.

I will see with someone to close the contour around the casing (with plasterboard that would be fine?)

and I will see to put a reflector (as for the radiator behind.)


A pro??? No, a wanker unable to advise his clients.
In the state, no chance actually that it will allow you to heat. A stove, it heats very mainly by convection, that is to say the heating of the ambient air which circulates around the stove. There, your heated ambient air goes directly into the old fireplace which has not been closed!
I will not give advice, we do not laugh with combustion devices, but you would have to find a "real pro" who would be able to see what is possible depending on the condition of the fireplace and from his hood. With obturation of the duct of course but also (see the post of Enerc) creation of vents in the hood allowing the hot air to circulate. A tip, no rough DIY .....
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Re: Can we insulate a hearth with an insert?

Unread Messageby AD 44 » 28/09/20, 22:55

Hi,

sicetaitsimple wrote:... A stove mainly heats by convection ...


...?!? All the rest of the forum is up to date?
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