Raising young poultry is a process that requires strict adherence to the temperature regime, which cannot be ensured in a regular chicken coop immediately after hatching. Bruder is an artificial environment that imitates the warmth of the mother's perch, and the survival of the chicks in the first weeks of life depends on the quality of this “house”. Using an old but sealed refrigerator is one of the most effective ways to create such a design at home.
The main advantage of this approach is the ready-made thermal insulation casing and the presence of a sealed door, which allows you to minimize heat loss even in the cold season. You will not have to invent complex insulation systems, since the walls of the refrigerator were originally designed to maintain temperature, albeit negative, but the principle of operation of the thermal circuit here works in both directions.
However, before proceeding with the conversion, you must clearly understand that the former freezer will now become a home for living beings in need of oxygen. It is critically important to completely dismantle the entire cooling system, including the compressor, condenser and, most importantly, the refrigerant pipes, since they can be toxic if damaged. Only after careful preparation of the “hardware” can you proceed to designing the internal environment.
Selecting and preparing the refrigerator body
For the manufacture of a high-quality brooder, medium-sized single-chamber models are best suited, since it is easier to organize uniform heating of the entire volume in them. Two-chamber units can be used, but the partition between the chambers often interferes with air circulation, requiring additional efforts to organize ventilation between the compartments. Old Soviet refrigerators with thick walls are considered the ideal option, but modern models with polyurethane foam insulation also show excellent results.
The first stage of preparation is the complete disassembly of the internal space. It is necessary to remove all shelves, drawers, egg trays and, of course, dismantle the lighting and control system if it is not to be used for new purposes. Internal surfaces should be thoroughly washed using disinfectants to eliminate the odors of past products and possible pathogenic microflora.
Pay special attention to the back wall where the evaporator was previously located. If you plan to install heating elements on the back wall, make sure that the surface is smooth and free of any adhesive or metal residue. In some models, the back panel may be removable, which simplifies the installation of infrared films or heating cables directly onto the insulating layer.
⚠️ Attention: When dismantling the cooling system tubes, use extreme caution. In older models, ammonia or freon could be used as a refrigerant, the vapors of which are hazardous to health. Carry out work only in a well-ventilated room or outdoors.
Calculation of the heating and ventilation system
Creating the correct microclimate is a balance between heating and air exchange. For heating, incandescent lamps, infrared emitters or low-power electric heating elements are most often used. The power is calculated based on the volume of the chamber: for a refrigerator with a volume of 250-300 liters, a heat source with a power of 150-200 W, regulated by a thermostat, is usually sufficient. Ventilation is the second key parameter, without which the chicks can simply suffocate from excess carbon dioxide and ammonia vapor. A series of holes with a diameter of 10-15 mm must be drilled in the lower part of the front panel or in the door to allow fresh air to flow in. Similar holes for the hood are made in the upper part of the rear wall, creating natural draft. thermostat.
Ventilation is the second key parameter, without which the chicks can simply suffocate from excess carbon dioxide and ammonia vapor. A series of holes with a diameter of 10-15 mm must be drilled in the lower part of the front panel or in the door to allow fresh air to flow in. Similar exhaust holes are made in the upper part of the rear wall, creating natural draft.
- 🔥 Incandescent lamps - a classic version that provides light and heat, easily adjustable with a dimmer.
- 🌡️ Infrared ceramic emitters - do not provide light, which is important for the bird’s rest at night, and dry bedding.
- 💨 Fans —computer coolers (12V) for forced air circulation, preventing the formation of “heat pockets.”
For uniform heat distribution, it is recommended to install a small fan that will constantly mix the air inside the chamber. This will prevent a situation where the temperature near the ceiling reaches +40°C, and near the floor - only +20°C, which is detrimental for young animals. The fan control can be tied to the same thermostat or left running constantly at low speeds.
Installation of heating elements and thermoregulation
The temperature control system is the “brain” of your brooder. The simple “turn on the lamp and forget” scheme does not work, since the temperature drops at night and can rise during the day. You will need an electronic thermostat with a remote sensor that will automatically turn the heating on and off, maintaining the set parameters with an accuracy of 0.1 degrees.
The temperature sensor should be placed at the level of the chicks' backs, but not directly touching the heating device, so that the readings are correct. If you use lamps, it is best to place them near the ceiling of the brooder, perhaps with a foil reflector pointing downwards. This will create a “thermal dome” effect.
Connection diagram:220V network -> Thermostat -> Heating element
(The temperature sensor is connected to the corresponding connector of the regulator)
As an alternative to lamps, you can consider installing a heated floor or a heating mat on the bottom of the brooder. This is especially true for the smallest chickens, who need warmth specifically in the paws and belly area. However, in a refrigerator with its high sides, top heating is still preferable, since heat naturally rises upward.
☑️ Checking the heating system
Organization of internal space and floor
The floor in the brooder should be warm, dry and non-slip. A glossy refrigerator shelf is not suitable for this - the chicks' paws will move apart, which can lead to injuries and the development of joint pathologies. It is best to make a removable wooden flooring or use a plastic mesh with a fine mesh installed above the pallet.
A litter tray must be installed under the mesh or flooring, which should be easily removed for cleaning. The original plastic tray of the refrigerator, if it has been preserved, or a baking sheet of the appropriate size is ideal as a tray. A layer of sawdust or straw is poured onto the mesh, which absorbs moisture and serves as a soft bedding.
| Age of the bird | Temperature (°C) | Humidity (%) | Features |
|---|---|---|---|
| 1-3 days | 30-32 | 60-70 | 24-hour lighting |
| 4-7 days | 28-30 | 60 | Light 20 hours a day |
| 8-14 days | 26-28 | 55-60 | Light 18 hours a day day |
| 15-21 days | 22-24 | 50-55 | Light 16 hours a day |
Feeders and drinkers are placed so that the chicks can easily reach them, but cannot climb inside with their paws and pollute the water. Vacuum drinkers mounted on small elevations made of bars are excellent for small chickens. Hopper feeders allow you to pour food for several days, which is convenient when leaving.
Safety and fire prevention
A brooder is an electrical appliance that operates in an aggressive environment with high humidity and dust (fluff, feather dust). All electrical connections must be securely insulated, and the wires must be protected from bird pecking. Use corrugated tubing or cable ducts to route wiring inside the housing.
The heating elements should not touch the plastic parts of the refrigerator or the wooden mat. The minimum distance from the lamp to any surfaces must be at least 30-40 cm, or they must be shielded with a heat-reflecting screen made of foil material. This will prevent the plastic from melting and possible fire.
⚠️ Attention: Never leave a working brooder unattended on the first day of operation. Be sure to check the operation of the thermostat in overheating mode and make sure that the emergency shutdown system is functioning correctly.
For additional safety, it is recommended to install a circuit breaker or RCD in the power circuit, designed for a current slightly higher than that consumed by the brooder. This will protect the network from a short circuit if moisture gets on the contacts or the heating element fails.
What to do if the electricity is turned off?
In winter, when there is a long blackout, the temperature in the brooder quickly drops. Prepare hot water bottles wrapped in towels in advance to temporarily warm the chicks, or move the brooder to the warmest room in the house.
Operation and care of the brooder
Proper operation of the brooder begins with its preliminary start-up. The day before moving the birds, turn on the equipment and adjust the temperature to make sure that all systems are operating correctly. This will also allow the walls and floor to warm up and eliminate residual odors from detergents.
Daily care includes checking the drinkers (the water should be clean and warm), adding food and removing wet bedding. Once a week, general cleaning is carried out: removable elements are washed and disinfected, and the body itself is wiped with a damp cloth. Regular cleaning prevents the development of coccidiosis and other infections.
As the bird grows, the temperature in the brooder must be reduced. Sudden changes are unacceptable, so reduce the thermostat readings smoothly, by 0.5-1 degrees every 2-3 days. When the temperature reaches 18-20°C and the chicks fledge, they can be transferred to a regular poultry house.
Frequently asked questions (FAQ)
Is it possible to use a two-chamber refrigerator as one large brooder?
Technically this is possible, but not recommended for beginners. The partition between the chambers interferes with air circulation, and it can be much hotter in the upper compartment than in the lower one. You will have to install additional fans and, possibly, two independent heating circuits with separate thermostats for each chamber.
What bedding is best for a brooder in a refrigerator?
The best option is dry hardwood sawdust or large shavings. Chicks may peck at small sawdust, which will lead to blockage of the crop. It is not advisable to use newspapers, as paws slip on them and the ink can be toxic. Straw is also rarely used for the smallest chickens due to the risk of mold development.
Is it necessary to provide additional lighting if infrared lamps are used?
Infrared lamps give a dim reddish light, which the birds perceive as darkness and calm down. For active feeding and growth in the first two weeks of life, chicks require about 20 hours of daylight. Therefore, it is recommended to install a separate LED strip or fluorescent lamp, which will turn on according to a timer.
How often do you need to ventilate the brooder?
With a correctly calculated ventilation system (holes at the bottom and top), constant ventilation is not required, since there is constant air exchange. However, when cleaning and replacing the bedding, the door should be kept open to completely renew the air. If you notice condensation on the walls, increase the diameter of the ventilation holes.