Are you willing to reline your chimney with an 8" liner (and will it even fit), or would you stick with the standard 6" liner?
I thought I would have to reline it? No? What's the difference between the 6" and the 8" (besides 2 inches
)?
Some people install stoves/inserts in masonry chimneys without a liner (you just run the stove pipe into the existing clay flue). I am not a fan of this, as most masonry chimneys have some deterioration. I would suggest a liner, and a few places mandate it (depends on local and state codes). It is not required in NC, but I have a 25' tall insulated 6" liner. You could have a certified professional (chimney sweep) inspect your masonry chimney. Liners add a decent amount to the cost of an install.
The difference is how much volume can be evacuated per minute. The largest stoves on the market (that will give you long burn times on the lowest setting) use an 8 inch flue collar.....this is because at their highest setting that big firebox is needing to move a lot of burn by-products.
6" is standard, and found in all of the small - medium stoves and inserts, and many of the larger ones. You could get away with a 6" liner and a larger stove/insert with what you have described (but others feel free to chime in).
Do you really want this to be your 24/7 heat, or just to supplement and knock the chill off?
Supplement.
I
f you are just supplementing, a smaller stove will work. You run it wide open when you are there (nights/weekends) and set it to run on a low burn overnight. Even if it burns out while you are asleep, it will save your heat 3 - 5 hours of running at night. Because you are interested in supplementing, I would try to find a lower price insert (even if it is on the small side, or used). It will let you know if you are interested in burning 24/7 without as much investment.
What is the actual square footage of your home,
2000 sq ft. 1000 per floor.
and what kind of insulation and windows do you have?
They are new vinyl, however they are installed (prev homeowner) poorly. It seems as though the installer forgot to put insulation around it. There are a lot of drafts coming from doors and windows.
Drafty windows/doors and a poorly insulated attic cause you to need more heat (both from a woodstove, and from a furnace). My house was built in 62 and we went from an R12 attic to R48 the first year we lived here. My house still has single pane windows, but they have been caulked and painted around so that there is no "draft" coming from them. Amazingly, they seal very tightly for old wooden windows. We weather sealed around all the doors, etc. The more of that you do, the less stove you need to heat the house (and the less your furnace runs).
There are many small inserts that you can put into that box very easily, that will make a very pretty fire for 3 - 5 hours.
I really don't want to lose the view of the fire. So the bigger the box the longer your heat duration? That makes sense since you can stuff more wood into it.
Correct to a certain extent.....some stoves burn better/longer at a low draft setting (or another way to say it is that they will allow you to restrict the air to the fire more) causing longer burn times. But if you are comparing two similar stoves, bigger firebox generally means longer burn time.
Almost any EPA certified stove/insert has a glass viewing window. Unless you buy an older "non-certified" stove (which tend to be referred to as smoke dragons), you will have a view of the fire.
The height of your fireplace will be your limiting factor, so that will really throw a few stoves out of the running.
Is mine fireplace opening short?
Your fireplace is fairly short......over half of the inserts on the market were made to clear your fireplace opening.....but some of the largest ones (that would be for 24/7 heating) would be too tall. To put it in perspective, my fireplace is 31.25 inches high (and 44 inches wide), I could actually fit a decent number of free standing stoves into mine.......
Let me know those things and I will send you some info. I have a huge list of inserts from my own search