Successfully Incubating Chicken Eggs in a Still Air Incubator
Still air incubators remain a favourite among Australian backyard poultry keepers, from hobbyists in suburban Brisbane to smallholders across the Riverina. Their low cost and mechanical simplicity make them ideal for anyone just starting out, while their passive design appeals to those who prefer a hands-off approach. Whether you are hatching a dozen Australorp eggs or expanding a heritage flock on a property outside Hobart, mastering the still air method rewards you with reliable hatches and healthy chicks.
This guide walks you through the practical steps, from choosing fertile eggs to moving day-old chicks into the brooder. Because still air incubators rely on gravity to circulate warmth rather than a fan, small adjustments in technique can make a meaningful difference. With careful preparation and steady attention, you can hatch strong, vigorous chicks suited to the varied climates found across the country.
Preparing Your Incubator and Workspace
Begin by sanitising the incubator thoroughly, even if it is brand new. A mild bleach solution or a poultry-safe disinfectant works well, and the interior should dry completely before any eggs are placed inside. Choose a stable spot away from direct sunlight, draughts, and heating vents; a corner of a laundry, garage, or shed in regional South Australia often provides the steady ambient temperatures that still air machines need. Make sure the room stays between 18 and 24 degrees Celsius, since wide swings will affect what the thermometer reads inside the cabinet.
Run the incubator empty for at least 24 hours to confirm the thermostat holds steady and the heating element cycles reliably. Place a reliable thermometer and hygrometer at egg level, not at the top of the unit, because temperature in a still air incubator can vary by several degrees from top to bottom. Fill the water channels according to the manufacturer's instructions and check humidity readings before you commit any eggs.
Selecting Fertile Eggs and Storing Them Properly
Source your eggs from a trusted breeder or a reputable hatchery such as Premium Poultry Breeds, where stock is carefully handled and shipped across capital cities and rural postcodes alike. Choose eggs that are clean, well-shaped, and free from cracks or thin spots. Avoid washing them, as this removes the protective bloom; instead, lightly buff away any soiling with a dry cloth.
If you cannot set the eggs immediately, store them pointed end down in a cool, humid spot for up to seven days. An old egg carton in a larder or pantry often works well, provided the temperature stays around 13 to 16 degrees Celsius. Rotate the eggs gently once a day to prevent the yolk from settling. Mark each egg with a pencil so you can track which side was last facing up, which becomes useful during the turning stage. For those interested in similar principles applied to other game birds, this raising chukar partridges habitat and feeding guide is worth bookmarking.
Temperature, Humidity, and Ventilation
In a still air incubator, the temperature reading at the top of the eggs should sit between 38.3 and 39.2 degrees Celsius, slightly higher than in a forced air model because warm air stratifies rather than circulates. Many Australian hatchers in places like Tamworth and Toowoomba calibrate their units using a medical-grade thermometer to ensure accuracy, since cheap stick-on gauges can drift. Adjust the thermostat in small increments and wait several hours before making further changes.
Typical parameters at each stage of incubation:
| Stage | Days | Temperature (°C) | Humidity (%) | Turning |
|---|---|---|---|---|
| Setting | 1–7 | 38.9 | 50–55 | 3–5 times daily |
| Growth | 8–18 | 38.6 | 50–55 | 3–5 times daily |
| Lockdown | 19–21 | 38.3 | 65–70 | None |
Raise humidity by adding wet sponges or filling extra water channels during lockdown to soften membranes and ease hatching. Ventilation matters too, even in a still air unit; open the small vents provided so carbon dioxide can escape and fresh oxygen enters, particularly during the final days when chicks begin to breathe inside the shell.
Turning, Candling, and Lockdown
Eggs should be turned at least three times a day for the first 18 days, ideally an odd number of times so the egg does not rest on the same side overnight. Mark each egg with an X on one side and an O on the other using a soft pencil, then roll the whole batch gently. Many Australian breeders set a phone alarm or use a chart pinned near the incubator to stay consistent. Stop turning entirely on day 18 and remove any automatic turner if fitted.
Candling with a bright LED torch on day 7 and again on day 14 lets you check development and remove clears or quitters. In a darkened room, a viable embryo shows a network of veins and a dark shadow, while an infertile egg remains uniformly bright when held to the light. By day 18, the air cell should appear well defined and tilted. This lockdown phase is the time to raise humidity and avoid opening the incubator unnecessarily, as temperature dips can shrink the air cell and complicate hatching.
Hatching Day and Beyond
Once a chick has pipped externally, resist the urge to help. Hatching can take 12 to 24 hours from first pip to fully emerged chick, and intervening often does more harm than good. Keep the incubator closed, maintain humidity, and let the chick fluff up naturally before moving it to a pre-warmed brooder at around 32 degrees Celsius. Local breeders often use a simple brooder box with a heat lamp, pine shavings, and a shallow water dish fitted with marbles to prevent drowning.
After the majority of chicks have hatched and dried, transfer them quickly into the brooder to avoid overheating the remaining hatchers. Provide a non-slip surface, fresh water, and a starter crumble formulated for chicks. Reduce the brooder temperature by about 2 degrees each week until the birds are fully feathered, which usually takes five to six weeks in the mild conditions of coastal New South Wales or southern Victoria.
Useful Supplies for a Smooth Hatch
- A calibrated thermometer and hygrometer placed at egg height
- A soft pencil and small dish for turning eggs
- Clean water for the humidity channels, changed every two days
- A reliable LED torch for candling sessions
Common Pitfalls to Sidestep
- Opening the incubator too often during lockdown
- Setting eggs that are older than ten days or stored at the wrong temperature
- Trusting the factory-set thermostat without verifying it yourself
Browse the live poultry and hatching eggs at Premium Poultry Breeds to find fertile stock delivered with care to postcodes across Australia, and start your next hatch with confidence.