Semi-removable Mass Stove

Tutorial de avatarLow-tech Lab | Categories : Housing, Energy

Semi-removable inertia mass stove. A mass storage stove or ‘heat storage stove’ is a primary heating device. Its mass, which is made up of heavy material (stone, brick and concrete), stores energy from a fire that burns once during the day (lasting between 1 and 3 hours). Once the fire has gone out, it then continues to give out heat over a prolonged period (for up to 24 hours). Its mass provides thermal inertia which helps to keep an even temperature inside a building (which is why these stoves are often also called “inertia stoves”). The whole of the quantity of wood needed to heat the dwelling is burnt in one go, making it burn hotter which allows complete and more environmentally-friendly combustion. It is a storage device which is designed to absorb the bulk of the energy that is generated from combustion and exhaust gases, which cool down considerably once out of the stove. Accumulated heat is mainly diffused by radiation and, in a few cases, by convection. This particular type of heating, i.e. that uses radiation, is best located in the centre of the dwelling and therefore, most mass stoves these days are positioned in the main room which opens out onto the lounge, dining room and kitchen. As yield tends tend to be in the majority of cases higher than 80%, these stoves are considered to be one of the most efficient wood-fuelled heating devices. Watch the tutorial video here [2]

License : Attribution-ShareAlike (CC BY-SA)

Video overview

Step 1 - Provision of Materials




Step 2 - How the Device is made up:




Step 3 - Sizingː


Step 4 - Fundamental Health and Safety Rules

Step 5 - Different types of Concrete: how to make them up and what goes in them.

Step 6 - Preparing the drum

Step 7 - Making the Ash Tray and Smoke Exhaust Holes

Step 8 - Fitting the Ash Tubes and Smoke Exhaust

Step 9 - Fitting the Moulds




Step 10 - Making the stopper for the ash tray

Step 11 - Casting the protective bottom

Step 12 - Making the Moulds


Step 13 - Positioning the Moulds.

Step 14 - Pouring the Refractory Concrete




Step 15 - Removing the Moulds

Step 16 - How to Make the Wood Feed Pipe.

Step 17 - How to make the Wood Feed Stopper

Step 18 - Making the Grate

Step 19 - How to Make the Heat Riser.



Step 20 - Making the Bell Chamber




Step 21 - Cutting out the glass




Step 22 - Cutting out the lid




Step 23 - Painting

Step 24 - Installation

Step 25 - Filling it up with sand

Step 26 - Fitting the glass

Step 27 - Directions for use

Step 28 - Maintenance

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