BatchRocket Mass Heater

About the 150mm BatchRocket mass heater

After the great success of our first model, the 100mm BatchRocket stove, we are very excited to share with you that we have been working on a new bigger model, a 150mm BatchRocket mass heater!

While talking to you we realized that in some cases, where there is poor insulation or the space is too big, the 100mm BatchRocket might not be sufficient to satisfy the heating requirements needed.

The 150mm has been specifically designed to fulfill a greater heating demand and produces more than double the heat output of the small model.


The Bell of the 150mm BatchRocket mass heater has a dimension of 68x90x170 cm and the heated bench next to it has a dimension of 150x60x50. Together it will weigh about 1400 KG.  It uses about 6 KG’s of wood per batch which gives off enough heat for 8 to 16 hours depending on the space you are heating.

The materials used are: 

  • Firebricks
  • Sand and clay to form firecob (which is cob without straw)
  • HTC (High Temperature Cement) for gluing the firebricks to create the core of the heater
  • Firecord and ceramic fibre blanket for insulation
  • A few steel parts: the door, the secondary air channel and the top plate


Whether this BatchRocket Heater is powerful enough to heat your space depends on many factors, but it is found that taking only the following aspects into account is often sufficient in determining the needed heater, and whether this one is sufficiently powerful:

  • How big the space is in cubic meters (m3)
  • How warm you would like it to be in the space compared to the outside temperature
  • How well is the place insulated.

If you provide these details to us we can calculate whether the stove is suitable for your space.

Purchase includes:

  • All the materials
  • Us building the heater in your place in five days time
  • User manuals on
    • drying the heater
    • maintenance of your heater
    • daily use of your heater
  • Free support while you become accustomed with your stove   

    Does not include:

    • Flue pipe installation
    • Any preparation work that needs doing before we can start installation
    • Applying any form of plastering
    • Transportation fees

    150mm BatchRocket mass heater

    Get In Touch

    Send us a message with the properties of your space and your personal requirements and we can advise you on what size Heater is most suitable for the space you want to heat. Also any questions are welcome.

    Reach out to us

    Share your ideas, ask your questions. We are here to help.


    Rua Principal 563
    3305-033 Benfeita

    Call Us

    (+351) 967 651 904
    for calls or WhatsApp


    Email Us



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    Our designs derive from the Batch Box Rocket concept by Peter van den Berg.
    Everything is published under the Creative Commons Attribution-ShareAlike 4.0 International license.

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