I've read a lot of posts on this site and am wanting to get some confirmation/opinions one my current best thoughts on my setup. I have a 4000 sq feet home I have calculated at peak btu loss of 90k btu's / hr. Last year I burned 1400 gallons of propane which seems to be in line with those numbers. My current heating is a propane furnace for basement and first floor and electric furnace for second floor. In the past I usually only really run the propane furnace because the upstairs is very open to the first floor and gets most heat from there. I am thinking for this year I will probably only by a heat exchanger for the propane furnace. It is 19x20 which show peak #'s of 150k btu / hr. I have a 30x40 shop that I plan on putting the boiler in. My current plan is an EKO 60. I will heat the shop a couple days a week probably. I have access to 500 gallon stainless containers for free so I plan on using 2 of those for storage. These could take about 10psi only so I plan to use them unpressurized. My house and shop are separated by about about 80 feet. I plan to buy 1 1/4" thermopex to install between them and also run some conduit for control wires and any other wires. I plan to by a water to air heat exchanger with fan for the shop. Based on my propane usage I am planning on 7 cords / year. My main questions are is any of this out of line or dumb? Also I plan on running a small pressurized loop from boiler to storage and use a flat plate heat exchanger to go to the 2 x 500 gallon storage tanks. I see a lot of schematics for hydronic heat but not a lot for forced air. I know they are similar but the heat requirements on water to air heat exchangers are much higher so I want to have priority to it before storage. I am up in the air on if the loop from shop -> house -> water / air heat exchanger should be off the pressurized loop of the boiler or from the storage. Hoping someone hear can give some advice / example schematics on that. Thanks in advance for any advice!