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Aerobin 400 Compost Bin - Our Best Seller!

Aerobin 200 Composter graphic

The First Composter Which Requires No Extra Work - No Turning Required

The Aerobin 400 uses a patented lung® or aeration core inside a sealed bin to promote aerobic break down of organic matter, which experts say is the preferable method to reduce greenhouse gas emissions.

The thermal insulation in the Aerobin 400 conserves heat, leading to rapid breakdown of the biomass and works efficiently year round, even in cooler regions. There is no need to turn the biomass and it is pet and rodent resistant. It has little odor and can kill noxious weeds and seeds.

The Aerobin 400 is easy to use - just open, drop and close. After a short time, fertile compost is produced, which is easily accessed via the lower side door.

The Aerobin 400 comes with a reservoir at the bottom to collect the leachate, which when diluted makes for great "compost-tea" liquid fertilizer. Now includes an updated hose and tap for 2021, see video below.

DEALERS:  Scroll to the documents section at the bottom of this page for informative, printable Aerobin 400 promotional materials

Additional Images and Information

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aerobin 400 composter
aerobin 400 composter features diagram
aerobin 400 airflow diagram
outdoor photo aerobin 400
aerobin 400 outdoor photo
close up aerobin 400
white background aerobin 400 compost bin
lid open white background aerobin 400 compost bin
leachate collector spigot
Aerobin 400 in the wild
Aerobin 400 2021 hose & tap system

Aerobin 400 Features

  • Capacity: 400 liters, 113 gallons.
  • Insulated side walls and lid for year round operation - both to retain heat generated by the aerobic composting process and stop cold ambient air reaching the biomass.
  • It has a base and a Leachate Tank for collection of liquid nutrients dispelled from the biomass (green waste). NOTE: updated hose and tap system for 2021, see images and video above.
  • No turning or agitating of the biomass is necessary - simply drop and forget!
  • Aerobin requires no accessories or tools.
  • It's vermin resistant.
  • Aerobin composts kitchen & garden waste quickly.
  • Moisture recirculation system.
  • Aerobin lowers GHG emissions.
  • Designed in Australia


  • Suggested Retail: $349.99
  • Size of Article (L x W x H): 29" x 29" x47"
  • Net Weight: 56 lbs.Single Packaging - boxes: 2
  • Kind of Packaging: Brown cardboard
  • Kind of Palette: 40" x 48"
  • Size of Master Carton box 1: 9.7" x 29.5" x 29.3"
  • Size of Master Carton box 2: 22" x 28.8" x 25"
  • Weight box 1: 23.7 lbs
  • Weight box 2: 49.5 lbs
  • Shipping quantities: Qty per 40' HC - 175 unitsUPS/Fedex Shippable

Pro Tip: Additional Strength Reinforcement Aerobin 200

If you have the Aerobin 200 (smaller version of the 400) you can easily add some additional strength reinforcement to the sidewalls of the unit by adding a self-tapping screw to the corner braces. This step is not required by the factory, but will help with the overall stability of the unit. See images below as a guide. You may also download a printable instruction sheet.

You may also view the Aerobin 200 Assembly Video completely before starting assembly, so that you'll have an idea what all the parts are for and what to expect. It's Easy!

aerobin 200 corner brcing for stability pic 1

aerobin 200 corner brcing for stability pic 2

Will the Aerobin work in freezing temperatures?

C.H. | 8/24/20

Please note Aerobin will keep composting at sub zero temperatures – but it will reach a point when the biomass will freeze over. When the Winter passes and ambient temperatures increase, the biomass will thaw out and the process will start again. However the more ingredients that you offer up to the Aerobin the more chance of the biomass remaining hot and fighting off the ambient cold weather.

Aerobin has insulation in the Lid & Walls that works both ways – it helps to keep heat in – as well as keeping heat & cold out.

My Mothers Aerobin is over 2 years old and has not yet produced compost. What are we not doing? It is in the sun with a Southerly exposure for most of the day. Thanks!

Rose Raggio | 8/12/20

Hi Rose,

Four key factors affect composting: Airflow, temperature, moisture, and the organic material added to the bin. Aerobin takes care of airflow and temperature. Adding organic waste and moisture level is usually where things might go awry.

Getting a good mix of organic materials – browns and greens may be the issue. Aerobin has a compost simulator on their site here that may help you determine if you have the correct mix. This document might also give you a good idea of what and how to add materials.

Another common issue I’ve seen is that the material in the bin is not