I've been researching how to heat domestic hot water with a wood cook stove. In some older literature I've seen range boilers mounted horizontally. Can any range boiler be mounted in this way? I would like to mount a range boiler above my kitchen in the bathroom plumbing closet. Unfortunately I am limited in height and how I ended up making this post. So far Vaughn seems to be the only company making range boilers. They do have a unit short enough for my space, but it is only 30 gallons. If I can't mount the larger tanks horizontally could I use two or three of these 30 gal range boilers like folks do with large wood boiler hydronic heating systems and multiple tanks? I want the range boiler(s) to feed a propane on demand water heater. I'm hoping to greatly reduce electricity and propane usage. Currently my house has a rusty electric resistance heater in need of replacement. I like the propane unit since it's cheaper than running a resistance electric unit and even if I'm not using the cook stove I'll have a nice buffer for the summer. Our well water comes out around 43f, I think. I also consider a HPWH, but they are huge and I'm already limted for space. Photos of the utility room and the plumbing closet for the bathroom above it are attached. The kitchen is on the right hand side of the utility room. My house is plumbed for a SWH, but it was bypassed long before we moved in. My plumber will be doing the installation for the on demand heater, tanks, etc. I just want to get a plan together and see how much this will all cost or if it's even feasible.