installed one on a 34
Don't know if my experience will help as I'm not familiar w/the 27's config., but I just put one in my 34. The big problem was placement for the smokestack. Can't do it on the main salon bulkhead b/c the compression post support would have to be severed (I didn't want to risk weakening that), and had other problems w/the bathroom sink b/c the chimeny cap would've been on a huge angle and got near lines. I settled on the forward v berth. In retro, this was the best bet b/c the heater doesn't crank enough to warm my main salon, but does heat the v berth so on cold nights we can cozy that area up (Anything to convince my wife that it's ok to sail in the winter). You may not have this problem w/a smaller salon.If you need to bend the smokestack to get around something, you can only do so at 45degree angles (per Force 10) -- I couldn't get mine bent properly so I had to do a direct exit w/clear deck above. MR