Im looking for some advice here. We finally got our 28x36ft cabin built. It is 1hr from my house where I work and live which is in the southern tier of WNY. We went with a frost wall and concrete pad with pex in the concrete for a radiant floor heat system. For extra free heat (from my woods) when we're there a nice wood stove was also installed. The dual purpose boiler we had installed is a Dunkirk and it will run the floors and the cabin hot water with propane fuel source. Before we have this fired up im looking for some opinions on my system. Question: My contractor is not recommending Glycol in the lines as he states it can reduce the efficiency and it is also corrosive to the system. He says I should get some kind of power out alarm or a freeze alarm to indicate the boiler isnt working and the temp has fallen below a certain temp. Right now I dont have any kind of WiFi or anything so what system is going to notify me and how? The temps here in the Buffalo area get cold, like into the single digits but usually not that drastic or for that long a period. Winter here is usually in the 20's and 30' with spouts up and down a bit. I sure as hell dont want these lines to burst or anything. Even after hunting season is over I will be going up there on a regular basis, probably once a week. Now that I will have heat and running water we can use it a lot more. Does anyone else have a back-up system they recommend or a way to notify me? The cabin is Tyvek wrapped, heavily insulated with R21 in the walls and R39 in the ceiling, then it is vinyl sided. I was thinking maybe put a small propane heater on the inside wall and set it to like 40 so if the power went out or a boiler failure and we lost heat it could kick on and keep the place from freezing. Thoughts/suggestions?