Build a 200-Chick Brooder in 2 hrs for $20

Baby chicks
The Joys of a Reliable, All-Weather Baby Chick Brooder.

One of the biggest challenges to keeping to flock of chickens is raising baby chicks successfully every time, especially when the weather doesn’t cooperate—and does it ever?

What’s Wrong With Ordinary Brooders?

The biggest single thing you can do to ensure successful with baby chicks is to build a chicken brooder that really does the job.

What’s wrong with ordinary brooders?

  • Overhead heat lamps are fragile, use a lot of electricity, and don’t keep the chicks as snug as you’d like.
  • Sheet-metal brooders don’t work at all in unheated rooms unless you have a guaranteed run of warm weather.
  • Propane brooders are available only for large-scale brooding.

Time for an Easy-to-Build Insulated Heat-Lamp Brooder

Since the brooders on the market don’t get the job done, you need to build one yourself. One that keeps the chicks warm, is easy to build, and is insulated to save electricity.

This design was developed by the Ohio Experiment Station in the Forties, and was once used on vast numbers of American farms, but was almost forgotten when I rediscovered them in the Nineties and popularized them again.

My book, Success With Baby Chicks(now available as both a paperback and an eBook), devotes two whole chapters to insulated electric lamp brooders, but I’ll give you the gist of it here. These brooders use light bulbs for heat: infrared heat lamps, floodlights, or ordinary light bulbs, depending on how big the brooder is and how cold it is outside. These brooders are very easy to build, the chicks love them, work great in any weather, and have a great reputation among those who use them.

These baby chick brooders are built mostly from plywood and can be banged together by anyone who can drive a nail one time out of three. They use two lamps, which means your chicks will be okay even if one burns out. Thermostats are not used (and aren’t desirable) in this kind of brooder, so there are no controls to set. It’s all very simple and foolproof. Millions of chicks have been raised with brooders of this design.

Insulated baby chick brooder

The insulated heat-lamp brooder is a simple plywood box on four short legs, with two heat lamps. Insulation is provided by piling wood shavings on top.

What follows is just a sampling of the information in my book, Success With Baby Chicks.

Insulated Heat-Lamp Brooder: Basic Concept

The basic facts can be summarized as follows:

  • Baby chicks need heat, but are very small, so only the heat at floor level matters.
  • Radiant heat, such as from heat lamps, can keep a chick warm even if the air temperature is cold, but radiant heat alone is expensive.
  • Heat lamps and light bulbs are the most convenient portable source of heat.
  • Heat rises, so it tends to heat the ceiling rather than the floor. Trapping the heat with an insulated ceiling above the chicks (a “hover”) will save energy.
  • Using a combination of radiant heat and an insulated hover will provide the best of both worlds, using one-third the electricity while keeping the chicks safer and more comfortable.
  • Winter brooding is straightforward with this equipment.
  • A lightweight plywood brooder with two heat lamps can be built in a couple of hours and will last for years.

Rules of Thumb

Chicks per brooder:

  • 50 chicks for a 2×2-foot brooder.
  • 100 chicks for a 2×4-foot brooder (my favorite size).
  • 200 chicks for a 4×4-foot brooder.

Lamp Selection

  • 250-watt bulbs are the most likely to scorch the lid of the brooder and cause premature socket failure. Use lower-wattage bulbs if possible.
  • Use either heat lamps or reflector floodlamps.
    • Heat lamps are preferable because of their longer life.
    • Red bulbs aren’t necessary unless you’re brooding a breed with a tendency towards brooder-house cannibalism. (Modern broiler breeds are non-cannibalistic, so you’re fine. Heritage breeds and modern laying breeds vary.)
    • Red heat lamps are available in 175 watts and 250 watts. Red floodlights are available down to 50 watts.
    • White heat lamps are available between 100 and 250 wats. White floodlights go all the way down to 30 watts.
  • For above- freezing temperatures, use two bulbs of the size given below (for winter brooding, see Success With Baby Chicks).
    • 2×2 brooder: 40 watts.
    • 2×4 brooder: 65 watts.
    • 4×4 Brooder: 125 watts.
  • Monitor the chicks first thing in the morning. If they are resting around the perimeter of the brooder, rather than inside, you can reduce the size of the bulbs, saving even more electricity.


  • Use porcelain lamp sockets. Other types don’t last due to the heat.
  • Use junction boxes rather than screwing the lamp sockets to the plywood.
  • Don’t overload the circuit. Among other things, your chicks will become chilled if a circuit breaker flips.
  • Don’t complicate things with thermostats or switches. These just add complexity and give you more ways to chill your chicks by setting things wrong. Plug in the lamps and leave them on.

Helpful Hints

  • Turn on your brooder early. The floor under the brooder must be warm and dry to the touch before the baby chicks are added.
  • At first, put your quart-jar waterers and first feeders so they are right at the edge of the brooder, so they’ll be lit up by the lamps.
  • As the chicks grow, raising the brooder up on blocks will make it warm a larger floor area, eliminating the tendency for the chicks to try to crowd inside.
  • The rule of thumb about “90 degrees under the brooder” doesn’t really apply to heat-lamp brooders. The comfort of the chicks, especially late at night or first thing in the morning, is your best guide.

I’ve reproduced the original Ohio Experiment Station bulletin below.

New Electric Lamp Brooder

Ohio Experiment Station, 1942
D. C. Kennard and V. D. Chamberlin

The new electric brooder to be described was designed and first used by this Station in October 1940. During the meantime, five of these brooders have been in almost continuous use. They have been used successfully for starting and brooding chicks throughout the year and for summer brooding of poults. This type of brooder was designed and is operated upon the basic principle that chicks or poults can be depended upon to adapt themselves readily to their heat and air requirements when ample heat and air are provided. This contention has been substantiated by the extensive use of these brooders throughout the year under widely varying conditions. In all instances, satisfactory results were secured with these simple, inexpensive brooders. At no time was there noticeable evidence of a need for thermostatic heat regulation, additional ventilation, or other items that would make these brooders more complicated and more expensive

The new electric lamp brooder:

  • Involves a minimum use of metals needed for war purposes. [This was published during WWII.]
  • Weighs about 30 pounds without insulation material.
  • Accommodates 150 to 250 chicks when made 4 by 4 feet or 250 to 300 chicks when made 4 by 6 feet.
  • Is operated on the basis of the behavior of and comfort of the chicks rather than thermostatic heat control or temperature shown by thermometer. Thermostatic heat control is unnecessary, since the chicks readily adapt themselves to their heat requirements and comfort in a brooder of this kind. A thermometer is misleading rather than helpful, since the ordinary thermometer can not be depended upon to indicate the radiant or infrared heat requirements of chicks or poults.
  • Has a wide range of heat supply for special brooding requirements throughout the year.
  • Requires no curtains during usual brooding conditions. In severely cold weather, curtains may be needed to conserve heat or prevent floor drafts; otherwise, curtains should not be used.
Ohio Experiment Station insulated heat-lamp brooder.

Figure 1. A 4×4-foot hover. Note 4-inch space on top for insulation material.

Electric lamps have recently become available which offer new opportunities for brooding chicks and baby turkeys. These lamps are available in two types, 150-watt projector or reflector spot or flood lamps and 250-watt R-40 Bulb Drying Lamps [heat lamps], all of which project infrared or radiant heat rays, as well as light rays. The projector lamps [outdoor floodlights] are made of heavy glass and can be subjected to cold, rain, or snow when burning, whereas the less expensive reflector lamps [indoor floodlights], made of thin glass, are liable to crack if subjected to water while burning. The projector and reflector lamps have a life rating of 1,000 or more hours, and a longer life can be secured by using 120-volt lamps on a 110- to 115-volt circuit. The 120-volt lamps generally serve for two brooding periods. The 250-watt R-40 Bulb Drying Lamps [heat lamps] have a much longer life rating, 5,000 or more hours.

Ohio heat-lamp brooder

Figure 2. Some of the chicks take to the top of the hover.

The satisfactory use of such lamps for converting batteries without heating elements into battery brooders suggested using them for floor brooders. In both types of brooders, the lamps were placed in a horizontal position to project the heat and light across the hover rather than downward.

The floor brooding hovers designed and used extensively by the Ohio Agricultural Experiment Station are simple, inexpensive, and easily made of plywood or pressed wood. The sides are 12 inches wide and extend four inches above the top to provide ample space of the fine litter-insulation material (fig. 1). Desirable insulation materials are finely ground corncobs, shavings, sawdust, or fine peat moss. With this type of hover, unlike most, the chicks are encouraged to roost on top of the brooder. After the first 2 weeks, they take to the top during the daytime and thus leave more room for those remaining on the floor (fig. 2).

Insulated baby chick brooder with two heat lamps.

Inside of a 4×4-foot hover equipped with two lamps.

The bottom edge of the hover is 4 inches above the floor. Side curtains can be used when needed during severely cold weather. If there are floor drafts, a curtain can be used on the one or two exposed sides.

The hover may be made 4 by 4 feet for 200 to 250 chicks or 4 by 6 feet for 250 to 300 chicks. The lamps are placed in a horizontal position in the center of opposite sides of the 4 by 4-foot hover or in the center of the ends of the 4 by 6-foot hover so that the center of the porcelain lamp socket is 3 inches above the bottom edge of the hover (fig. 3).

Bill of Materials

The following materials are needed for a 4 by 4-foot brooder:

  • One piece of 4 by 8-foot, ¼-inch plywood or 1/8-inch pressed wood (to be cut into one 4 by 4-foot top and four 1 by 4-foot sides)
  • Four cleats 1 inch by 1 inch, 4 feet long, to which the top and sides are nailed.
  • Four pieces of 1 ½ by 1 ½-inch lumber, 16 inches long, for corner posts or legs
  • Two porcelain electric lamp bulb sockets (Porcelain lamp sockets are necessary for these lamps)
  • One 150-watt, 115- to 120-volt projector or reflector Mazda spot or flood lamp and one 250-watt R-40 Bulb Drying lamp
  • Twenty feet of rubber-covered electric appliance cord with plug and cap

No special provision need be made for ventilation. That which takes place through the open space between the lower edge of the hover and the floor will be ample. As the chicks or poults grow larger and need more air and less heat, bricks or blocks can be placed under the legs to raise the hover 2, 4, or 6 inches higher. When feed and water are to be placed under the hover, or the floor litter is to be removed, one side can be raised to the desired height and held in place by a hook suspended from the ceiling of the brooder house.

This type of brooder with the abundance of light within makes it convenient to feed and water the chicks or poults under the hover during the first day or two; after that, the feed and water can be moved outside. The abundance of light beneath the hover and the feeding of baby turkeys under the hover during the first few days have proved especially advantageous for starting poults.

Insulated heat-lamp brooder at night

Figure 4. Chicks under the brooder at night.

No thermostatic regulation of the temperature is needed, since the chicks readily adapt themselves to their own temperature requirements and comfort in a brooder of this kind. Whenever it is observed that a considerable number of the chicks find it comfortable at the edge of, or outside, the brooder, the hover should be raised 2 to 4 inches to admit more air and to lower the temperature beneath it. If two lamps are in use, one can be turned off.

The curtains used at the Experiment Station when needed to prevent floor drafts or to conserve heat under the hover during cold weather are strips of cloth 8 inches wide and 4 feet long made from feed bags. The strips are attached to the sides of the hover with thumbtacks so that the bottom of the curtain is ½ to 1 inch above the floor litter. The bottom of the curtain should be hemmed but need not be slit. When the hover was used in a room provided with another source of heat so the temperature seldom went below 40 F, curtains were not needed unless there was evidence of a floor draft which caused the chicks to congregate at one side of the hover. When that occurred, a curtain was attached to the exposed side or sides opposite those where the chicks congregated. A curtain on one or two of the exposed sides gave effective protection against floor drafts. When day-old chicks were started in an uninsulated colony house during cold weather (10 to 20 F.) in January 1941, it was necessary to use curtains on three sides of the hover during the first week to conserve the heat under the hover. Afterwards, two of the curtains were removed; one was left to prevent floor drafts. Also, a corrugated cardboard band 12 inches wide was used to keep the chicks within 1 to 2 feet of the hover during the first few days. Feed and water were provided under the hover during the first 2 or 3 days.

In usual practice under average brooding conditions during April or May or in a room where supplementary heat is provided, the 250-watt lamp would generally be used during the first week or 10 days of the average 6-week brooding time, when the chicks or poults need the most heat. After that time, the 250-watt lamp would generally be discontinued, and the 150-watt lamp used for the rest of the brooding period. On this basis, the cost of operating the 250-watt lamp 10 days (at 18 cents a day of 24 hours with electric current at 3 cents a K.W.H.) would be $1.80, and that for the 150-watt lamp (at 10.8 cents a day for 32 days), $3.45. The total cost of electricity during a 6-week brooding period would, then, be $5.25. In warm weather, the cost of the electricity would be lower, since the brooder lamp would either be turned off, or one of the brooder lamps replaced by an ordinary 15-, 25-, or 50-watt Mazda light bulb to provide an attraction light and a small amount of heat during warm days or nights. Likewise, the small Mazda bulbs could be used during the latter part of the brooding period, when an attraction light and only a little heat are needed. On the other hand, brooding during cold weather in a cold room with both lamps in use much of the time would cost correspondingly more, just as the cost of brooding during cold weather is greater regardless of the source of heat.

The effective insulation against heat loss which this type of hover provides can, however, be expected to prove economical in the use of electricity regardless of the kind of electrical heating element employed. In two of the tests, meter readings were made to secure the electric current requirement of the lamp brooder in comparison with a conventional brooder equipped with thermostatic heat regulation, fan, and special ventilation. The first test was conducted in uninsulated colony brooder houses during January and February, 1941, and the second, in adjoining brooder pens during April and May. In both cases, the electric current consumption was somewhat less for the lamp brooder.

The principal advantages of the electric brooder described are simplicity, low first cost, and effective insulation at practically no cost. Some poultrymen may be inclined to add needless complications and expense, such as thermostatic heat regulation, special ventilation, or other nonessential items or gadgets which would tend to offset the primary advantages and purpose of this type of brooder. The contention that such additions are needless is based upon the results of a year of almost continuous use of five of the brooders at the Station’s Poultry Plant. Hundreds of chicks have been brooded at all times of the year under widely varying conditions. In all instances, satisfactory results were secured with these simple, inexpensive brooders. At no time was there noticeable evidence of a need for thermostatic heat regulation, additional ventilation, or other items that would make these brooders more complicated and expensive.

For More Information on Chicken Brooding

Read my book, Success With Baby Chicks.

If You’re Serious About Your Chickens…

You need practical information. I publish serious chicken books under my Norton Creek Press label. Most of these were written 50 or more years ago, before the shift to factory farming and the decline of the family farm caused serious poultry books to no longer be published, except for a few textbooks aimed at graduate students.

Robert Plamondon
Robert Plamondon has written three books, received over 30 U.S. patents, founded several businesses, and is an expert on free-range chickens. His publishing company, Norton Creek Press, is a treasure trove of the best poultry books of the last 100 years.

3 thoughts on “Build a 200-Chick Brooder in 2 hrs for $20

  1. robert i read u have over 30 patents ,i =d like to know how to go about it do u have advice or tips of do or don;t u are a interesting man to read up on so please respond

    • James, thanks for writing! The patent thing is a side effect of two converging forces in Silicon Valley startups: (1) being willing to write up and extend other people’s ideas, and (2) being heavily involved in the blue-sky end of new-product development, where coming up with both new ideas and new wrinkles on old ideas are both everyday activities.

      I’d have no patents at all if I had to pay for them out of my own pocket. I’d have fewer except that, when I was at one company, we were making a joint-development deal with another company, one where all intellectual property that wasn’t specifically claimed in advance would be considered to be “jointly developed,” which would give away stuff we wanted for ourselves if we didn’t get busy. This meant we went into a frenzy of filing our entire backlog of patentable ideas. Normally we’d procrastinate and then only file the most urgent concepts, so this resulted in more patents being filed that we’d have done otherwise.

      Getting a patent doesn’t require a world-shaking idea, it’s mostly time-consuming, and the process is a bit strange.

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