Rocket mass heater in a skoolie?

[megoestiny501]

I'm looking for some advice on heating options for my skoolie. I'm located in a pretty rural part of Montana and with winter around the corner, I'm trying to figure out a safe and efficient way to stay warm. Last winter, I was using a little tent stove and while I loved the cozy campfire smell, it wasn't the safest or most efficient setup. I'd leave the stovepipe running out a cracked window, which obviously isn't ideal.

My bus is a 2002 International and I've got this built-in bench that I think would be a great base for a small rocket mass heater. I've been doing some research and I'm really intrigued by the concept of a super-efficient burn and a long-lasting heat source. I'm worried about safety though since I only got a small space and it might create a fire hazard or have smoke leak into the living space. Has anyone here ever tried to build a rocket mass heater in a tiny home or a bus? Any tips, suggestions, or words of caution would be a huge help. I'd really appreciate it!

 

[chloe writes]

I've seen a few skoolie builds use rocket mass heaters. It can work, but there are some important things to consider. The Cottage Rocket by Uncle Mud is one of the few designs made for small spaces like buses and tiny homes. It's lighter than traditional cob heaters and you can use removable gravel mass to help with weight and moving the heater. Make sure your exhaust system is airtight and safely routed, since any leaks could be dangerous in a small space. It's also essential to have a thermal break between the heater and the bus floor, especially if your floor is wood or composite.

Have you checked the weight rating for your bench framing and floor? That will help you know how much mass you can safely add. Are you planning to keep the bus mobile, or will you park it for the season? That affects how permanent your setup can be. If you're staying put through winter, a well-built rocket mass heater can give you steady heat with very little fuel. Let me know what materials you're considering, and I can help you figure out what's practical.

 

[bigwonderer]

You need a well sealed chimney that exits through the roof or wall with proper clearances. It is not safe venting through a cracked window.

 

[Roth_Mantel]

I’ve built a rocket stove in a shed before, and I wouldn’t put one in a bus without serious fireproofing. The radiant heat from the burn tunnel can warp or even ignite nearby materials if they’re not spaced right. If you want that same steady heat, check out marine diesel heaters. They’re compact, vented, and way easier to regulate inside a tight build like yours.