I have a Montlake 300 on order that I want to install into my 70s house that has a heat form (I'm pretty sure), along with demo'ing the existing green rock fascia and remodeling with something else. I need to have this installed for winter!
I started happily demo'ing the green rock above the firebox, then paused for fear of loading bearing concerns around the heat form. I understand most people just cut out the damper and the backside to make enough room for the liner, but since I'm remodeling the whole fireplace anyway, and I want to add things like electric (for the fan) and Auber flue temp sensor, I might as well rip it all out...
Some facts
Rough goals / plan
Appreciate your advice.
![tempImagebM45UE.png tempImagebM45UE.png](https://www.hearth.com/talk/data/attachments/298/298721-9affb9745d398db7d2a02fec74ea81eb.jpg)
I started happily demo'ing the green rock above the firebox, then paused for fear of loading bearing concerns around the heat form. I understand most people just cut out the damper and the backside to make enough room for the liner, but since I'm remodeling the whole fireplace anyway, and I want to add things like electric (for the fan) and Auber flue temp sensor, I might as well rip it all out...
Some facts
- Mid 70s house in Douglas County, NV
- Masonry/brick (upstairs), large stone/rocks (downstairs), and cement blocks make up the chimney
- 4 flue chimney, with terra-cotta liners in each. Upstairs open fireplace (heat form) on one side, and small Morso stove (no liner) on other side. Downstairs open fireplace (heat form with a gas line - I've capped off the gas) on one side, outdoor BBQ/smoker insert on the other side
- 3" drop from the hearth into the firebox (b/c of gas line)
Rough goals / plan
- Demo all the downstairs green rock, keeping the upstairs brick, open fireplace, and small stove as-is
- Remove heat form, or cut out what is needed (leaning towards removal, to make electric outlet, Auber sensors, etc easier)
- Install Montlake 300 with insulated flexible dual wall liner, roxul, back off plate, etc
- Remodeling of fireplace will likely have to wait til next Spring/Summer
Appreciate your advice.
![tempImagel37vWH.png tempImagel37vWH.png](https://www.hearth.com/talk/data/attachments/298/298712-52ef2bbbcc09354734c0739d52791f7b.jpg)
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