What do you do when you want a fireplace? Build one!
But the first thing you need to do is hack a big whole in the wall. Here is how I made our fireplace. It may not be how you would have done it, but that's how I did it and it works for me! The bricks on the floor are re-claimed from the old Opera House that was in town. When they took it down, I went with my truck and picked up hundreds of bricks. The firebox is from Menards. (I would not recommend you buy yours from there. It was expensive and I'm not that impressed with the quality.) In the case you are wondering... the shelf on the wall is where the great big TV calls home. Since these pictures, I've washed off the mortar from the bricks.
Again, reclaiming and reusing is the theme at our house. The wooden logs were from my sister and her husband. They had a log cabin which had some extra logs stored in the basement. They arrived at my house almost 3 years ago. This summer we dug them out of the garage and used them as the first course on the foundation. Since I'm not very good at concrete forms, we used blocks as the foundation. I also followed Frank Lloyd Write's foundation techniques. Dug a trench, filled it with rock, and set my blocks on the rock. The foundation is 3 feet in the ground. 
Then a treated piece of lumber and the logs. On top of the logs went the studs and three windows. The two smaller windows were reclaimed from our own house. From when we put the grainbin on. The large window was given to me by a contractor in town. It was new and the wrong size for the house they were building. We wanted to use stone for the front but it was very costly so we opted for pretend brick. It was costly also but we really wanted it. So out the door our money went. We had never put on corrugated roofing but in a plant room you need more light than my windows provided. We made a frame for the roof to sit on and I painted it black hoping to attract heat. (you can see the roof framing in the french door picture) For the floor of the plant room we added 2 feet of gravel and a layer of sand. On top of that we put reclaimed brick from the Opera house in town that they tore down. I've used that brick all over my farm! We didn't want to close in the existing outside entrance to the basement so we covered it with used 2 by boards. I'll take pictures of the inside later. The gravel acts as a heat sink, drawing in the heat from the room and then releasing the stored heat in the dark of the night. We also put a horse tank in the floor. It will be used to hold water which will come off of the roof, into the water butt (pictures later) and when the water butt gets full, it will overflow to the horse tank via a clear tube. I'll use the water for heat storage and watering my plants. We put the wood furnace in the plant room and will burn wood to heat the house as well as the plant room. 
Because the plant room is on the south side of our house, there was a window in the living room which we changed to french doors. Of course the doors came from an auction. I didn't even buy them. Someone else bought them and stored them here. That person hasn't claimed them for 10 years, so I used them. Sorry Charlie! When we get the inside of the plant room finished I'll post some pictures of the inside.
