All projects

Energy & Cooking

Cut fuel spend and smoke exposure with stoves and fuels you can build and feed locally. These designs come out of the efficient-combustion community, where measured fuel savings — not guesses — decide which design wins.

Making fuel from waste? Start with the briquette chainNine linked plans — char kiln, presses, drying rack and stoves — in build order.Open →
A brick institutional rocket stove built up as a masonry block with sunken pot seats
Energy & CookingVerified Build

Insulated Brick Rocket Stove

A J-shaped combustion chamber that burns small sticks hot and nearly smoke-free, cutting cooking fuel by half or more.

$8 – $20, or free from reclaimed brick and clayBeginner
Hand-rolled fuel briquettes drying in basins in Uganda
Energy & Cooking

Lever-Arm Charcoal Briquette Press

Press agricultural waste and charcoal dust into burnable briquettes, turning a disposal problem into cooking fuel or a product to sell.

$35 – $80 in timber, steel pipe and fastenersIntermediate
A roof-mounted solar water heater with collector and insulated storage tank
Energy & Cooking

Batch Solar Water Heater from a Salvaged Tank

A black-painted tank in a glazed, insulated box that gives hot washing water by mid-afternoon with no pump, controller or electricity.

$80 – $250, less if the tank and glazing are salvagedIntermediate
A cook working over a moulded mud stove with a pot seated in the stove opening
Energy & CookingVerified Build

Improved Mud Cookstove with Fuel Shelf

A moulded clay-and-sand stove with a sized combustion chamber and pot skirt that cuts firewood use by roughly a third against a three-stone fire.

Under $10 — mostly labour and local clayBeginner
A group weaving and packing insulated baskets for fireless retained-heat cooking
Energy & CookingVerified Build

Retained-Heat Basket Cooker

An insulated basket that finishes cooking beans, rice and stews off the fire, cutting fuel for long-boil foods by half or more.

$5 – $15 from local cloth and dry fillingBeginner
A plywood solar box cooker with glazed lid and reflector, pot inside on a dark absorber plate
Energy & Cooking

Plywood Solar Box Cooker

A glazed, insulated box with a hinged reflector that reaches 120 – 150 °C and cooks a full pot of food on sunlight alone.

$25 – $70 depending on glazing and foilIntermediate
Labelled drawing of a floating-drum biogas digester showing dung inlet, gas holder and slurry outlet
Energy & Cooking

Floating-Drum Biogas Digester

A dung-fed digester with a floating gas holder that supplies two to three hours of cooking gas a day from a few animals' manure.

$300 – $900 for a 4 – 6 m³ household unitAdvanced
Steel drum charcoal kilns set into the ground for a controlled burn
Energy & Cooking

Drum Retort Charcoal Kiln

Char wood inside a sealed inner drum heated from outside, burning the smoke as fuel — far higher yield and far less smoke than an earth-mound burn.

$60 – $150 for two drums and fittingsIntermediate
Assembling solar panels for a small off-grid charging installation
Energy & Cooking

Solar Phone Charging Bench

A small panel, charge controller and battery wired into a multi-port charging bench — reliable phone charging at home, or a shop that pays for itself in a season.

$120 – $300 for panel, battery, controller and portsIntermediate
A multi-blade water-pumping windmill on a lattice tower with tail vane
Energy & Cooking

Windmill Water Pump

A multi-blade rotor on a guyed tower driving a piston pump down a shallow well — steady stock and irrigation water anywhere the wind blows most days.

$400 – $1,200 depending on tower height and pump depthAdvanced
Diagram of a top-lit updraft wood gas stove showing primary and secondary air paths
Energy & Cooking

TLUD Gasifier Stove

A top-lit updraft can stove that burns wood gas cleanly with a blue flame and leaves behind biochar instead of ash — cleaner cooking and a soil amendment from one burn.

$5 – $25 from scrap tinsBeginner
A hydraulic ram pump installed on a rigid drive pipe
Energy & Cooking

Hydraulic Ram Pump

Use the shock of falling water to push a fraction of that flow far uphill — no fuel, no electricity, two moving valves, running day and night.

$80 – $300 in fittings for a 32 – 50 mm ramAdvanced
A bicycle mounted on a stand driving a small generator
Energy & Cooking

Pedal-Powered Generator

Mount a bicycle on a stand driving a permanent-magnet motor as a generator, and charge phones, lamps and radios with your legs when the grid and the sun are both out.

$60 – $250 depending on the motor and batteryIntermediate
Labelled diagram of a manual lever-arm briquette press: lever, piston, drilled mould cylinder and timber base, with finished briquettesDiagram
Energy & Cooking

Lee Hite Eco-Briquette Lever Press

The EWB-documented lever press that squeezes soaked waste paper and biomass into dense fuel briquettes — the design with real numbers behind it.

$25 – $90 in timber, pipe and hardwareIntermediate
Extruded biomass briquettes with hollow centres, made from bush biomass in Namibia
Energy & Cooking

Hand-Cranked Screw Briquette Extruder

A screw auger in a tapering barrel that extrudes a continuous log of compacted biomass — higher output than a piston press once the feedstock is right.

$120 – $400 depending on whether the auger is fabricated or salvagedAdvanced
Hand-moulded waste briquettes drying in a basin and bucket at a production yard in Uganda
Energy & Cooking

Waste Paper & Leaf Briquettes

The simplest fuel in the library: soak waste paper and dry leaves, press by hand in a perforated tin, dry hard, and burn what would have been rubbish.

Under $15 for a tin mould, a drum and a rackBeginner
A steel Kon-Tiki cone kiln in Namibia holding a finished batch of biochar
Energy & Cooking

Cone Pit Biochar Kiln

A sloped-wall cone or flame-cap pit that turns crop residue and prunings into biochar with far less smoke than a smouldering pile.

Free as a dug pit; $80 – $250 for a steel coneIntermediate
Labelled diagram of a shaded three-tier biomass drying rack on stone footings with airflow markedDiagram
Energy & Cooking

Raised Biomass Drying Rack

The unglamorous rack that makes every fuel project work: raised, ventilated and shaded from rain so briquettes and firewood actually dry instead of moulding.

$10 – $60 in poles, mesh and roofing offcutsBeginner
Labelled cutaway diagram of a sawdust tin stove showing packed sawdust, central air channel, base air holes and pot supportsDiagram
Energy & Cooking

Packed Sawdust Tin Stove

Pack damp sawdust hard around a stick in a tin, pull the stick out, and light a stove that burns for an hour on waste from the timber yard.

Under $5 for a tin and a tamping stickBeginner
A Pelton wheel runner showing the split spoon buckets around the rim
Energy & Cooking

Micro-Hydro Pelton Wheel

Where a stream drops ten metres or more, a spoon-bucket Pelton wheel on a penstock can run lights and charge batteries around the clock.

$300 – $1,200 including pipe, alternator and wiringAdvanced