Hello folks,
We have a 1989 vintage Timberland 'Fireplace Heat Exchanger' model RM36 manufactured by Messer Manufacturing in Windom, MN. It is an attractive install, but I don't believe it was ever intended to supply much of the heat to our home. I would like to change that, and retrofit this unit with something more efficient. The masonry is built around the unit, so I am looking for ideas that don't involve drastic stonework. And, being a corner unit presents it's own challenges. The door frames are attached separately, so they are easily removed, but beyond that I would love any thoughts.
![Retrofit suggestions Retrofit suggestions](https://www.hearth.com/talk/data/attachments/298/298547-33c3962a1dc9e10dd2461a1d17ed26dd.jpg)
![Retrofit suggestions Retrofit suggestions](https://www.hearth.com/talk/data/attachments/298/298548-3b853ededbe12ad3ed4b0f6013a8fc48.jpg)
![Retrofit suggestions Retrofit suggestions](https://www.hearth.com/talk/data/attachments/298/298549-25c21a29d5e7373b7e3261f306f67420.jpg)
![Retrofit suggestions Retrofit suggestions](https://www.hearth.com/talk/data/attachments/298/298550-cd3dc5ffe8b94874e8d60e4c6b9f3325.jpg)
![Retrofit suggestions Retrofit suggestions](https://www.hearth.com/talk/data/attachments/298/298551-8bd14a7b27c12c82b68f55051d9c7fbe.jpg)
We have a 1989 vintage Timberland 'Fireplace Heat Exchanger' model RM36 manufactured by Messer Manufacturing in Windom, MN. It is an attractive install, but I don't believe it was ever intended to supply much of the heat to our home. I would like to change that, and retrofit this unit with something more efficient. The masonry is built around the unit, so I am looking for ideas that don't involve drastic stonework. And, being a corner unit presents it's own challenges. The door frames are attached separately, so they are easily removed, but beyond that I would love any thoughts.
![Retrofit suggestions Retrofit suggestions](https://www.hearth.com/talk/data/attachments/298/298547-33c3962a1dc9e10dd2461a1d17ed26dd.jpg)
![Retrofit suggestions Retrofit suggestions](https://www.hearth.com/talk/data/attachments/298/298548-3b853ededbe12ad3ed4b0f6013a8fc48.jpg)
![Retrofit suggestions Retrofit suggestions](https://www.hearth.com/talk/data/attachments/298/298549-25c21a29d5e7373b7e3261f306f67420.jpg)
![Retrofit suggestions Retrofit suggestions](https://www.hearth.com/talk/data/attachments/298/298550-cd3dc5ffe8b94874e8d60e4c6b9f3325.jpg)
![Retrofit suggestions Retrofit suggestions](https://www.hearth.com/talk/data/attachments/298/298551-8bd14a7b27c12c82b68f55051d9c7fbe.jpg)