Varanus99
11-08-2008, 11:45 PM
Thought I would give a little how-to on homemade incubators.
As far as incubators go you got your cheap ones (Hovabators) which are ehhhh and your good ones which are $$$. Once you've outgrown the small incubators and you need a big one look out cuz you're gonna spend some dollars.
So I decided to go with an old fridge conversion. A freezer would have been better since its one big chamber but the fridge works fine for me since its plenty of room and I use the top for storage. If you wanted to get fancy, which I may do in the future, you could wire up the top and set it to a different temp than the main chamber. Fancy shmancy.
Ok so step 1, get an old fridge. Not hard to do. I got mine at a used appliance store. When old fridges die they arent worth fixing so they usually just get scrapped.
Next you wanna get the freon out. The guy at the appliance shop recovered it for me since he can re-use it. Its not the best idea to do it yourself. Not to mention illegal to release it into the environment. However, if you are gonna crack the line and let it drain be careful and wear eye protection. That stuff can blind you. No joke.
Once the freon is out you're home free. Go ahead and tear out all the stuff that makes it run since it makes the unit much lighter. Compressor comes out, all the doohickeys inside that are just in the way. Rip it all out.
Once its clean and ready all you need to do is attache a piece of Flexwatt to the rear of the fridge. I went with 3' of 11" Flexwatt which I got pre-wired from Reptile Basics for like 5 or 6 bucks. You may not need that much but I figured what the heck. Better to have too much than not enough. Then you use some good 'ol foil tape and attache it to the back like so:
http://i249.photobucket.com/albums/gg239/Varanus99/002.jpg
I went ahead and installed some sheet metal behind the tape just for safety. Probably not necessary but why not. Its cheap and only took a few minutes. Here you can see the sheet metal screwed down with the Flexwatt over it:
http://i249.photobucket.com/albums/gg239/Varanus99/004.jpg
I was lucky enough to find a rubber plug in the back of my fridge which I ripped out and used to run my wires through. If you dont find one of those you may have to drill a hole. Not a big deal. Once your Flexwatt is secure you just run your plug out the back and connect it to your T-stat. I went with a Helix but use whatever good quality T-stat you like best. I would suggest a proportional one for an incubator not just an on/off. Here she is:
http://i249.photobucket.com/albums/gg239/Varanus99/007.jpg
Now you put your probe back through the hole. I like to use a back up digital thermometer as well so I got two probes in there. I set them about midway down and then I checked the whole thing with a temp gun. Fridges have very good insulation so Im off less than 1 degree top to bottom.
http://i249.photobucket.com/albums/gg239/Varanus99/003.jpg
Then I just stuffed the hole that the wires run through with some insulation. Easy.
When I got my fridge the old glass shelves were all messed up so I ripped them out and made my own with metal closet shelving from Home Depot. I like this better since these type of shelves allow better transfer of heat and I was able to mount them where I wanted. If you wanna go nuts you could fit a lot of shelves in there.
Thats about it. Once its calibrated you should be all set. Like I said the insulation capabilities of a fridge are amazing. Its in a room that has fluctuated from 50 degrees to 90 degrees and it holds me steady at 84-85 or whatever I set it at. Keeps the cold and heat out as well as it keeps the heat in. Also holds humidity pretty good. I dont use a fan but you could add one if you like.
The whole thing cost less than 30 bucks to put together without the T-stat. Thats your most expensive piece. But also your most important piece. Even with the Helix you're looking at a pretty gosh darn big incubator for well under $200. Not bad.
Annnnnnnnnd thats all folks!
As far as incubators go you got your cheap ones (Hovabators) which are ehhhh and your good ones which are $$$. Once you've outgrown the small incubators and you need a big one look out cuz you're gonna spend some dollars.
So I decided to go with an old fridge conversion. A freezer would have been better since its one big chamber but the fridge works fine for me since its plenty of room and I use the top for storage. If you wanted to get fancy, which I may do in the future, you could wire up the top and set it to a different temp than the main chamber. Fancy shmancy.
Ok so step 1, get an old fridge. Not hard to do. I got mine at a used appliance store. When old fridges die they arent worth fixing so they usually just get scrapped.
Next you wanna get the freon out. The guy at the appliance shop recovered it for me since he can re-use it. Its not the best idea to do it yourself. Not to mention illegal to release it into the environment. However, if you are gonna crack the line and let it drain be careful and wear eye protection. That stuff can blind you. No joke.
Once the freon is out you're home free. Go ahead and tear out all the stuff that makes it run since it makes the unit much lighter. Compressor comes out, all the doohickeys inside that are just in the way. Rip it all out.
Once its clean and ready all you need to do is attache a piece of Flexwatt to the rear of the fridge. I went with 3' of 11" Flexwatt which I got pre-wired from Reptile Basics for like 5 or 6 bucks. You may not need that much but I figured what the heck. Better to have too much than not enough. Then you use some good 'ol foil tape and attache it to the back like so:
http://i249.photobucket.com/albums/gg239/Varanus99/002.jpg
I went ahead and installed some sheet metal behind the tape just for safety. Probably not necessary but why not. Its cheap and only took a few minutes. Here you can see the sheet metal screwed down with the Flexwatt over it:
http://i249.photobucket.com/albums/gg239/Varanus99/004.jpg
I was lucky enough to find a rubber plug in the back of my fridge which I ripped out and used to run my wires through. If you dont find one of those you may have to drill a hole. Not a big deal. Once your Flexwatt is secure you just run your plug out the back and connect it to your T-stat. I went with a Helix but use whatever good quality T-stat you like best. I would suggest a proportional one for an incubator not just an on/off. Here she is:
http://i249.photobucket.com/albums/gg239/Varanus99/007.jpg
Now you put your probe back through the hole. I like to use a back up digital thermometer as well so I got two probes in there. I set them about midway down and then I checked the whole thing with a temp gun. Fridges have very good insulation so Im off less than 1 degree top to bottom.
http://i249.photobucket.com/albums/gg239/Varanus99/003.jpg
Then I just stuffed the hole that the wires run through with some insulation. Easy.
When I got my fridge the old glass shelves were all messed up so I ripped them out and made my own with metal closet shelving from Home Depot. I like this better since these type of shelves allow better transfer of heat and I was able to mount them where I wanted. If you wanna go nuts you could fit a lot of shelves in there.
Thats about it. Once its calibrated you should be all set. Like I said the insulation capabilities of a fridge are amazing. Its in a room that has fluctuated from 50 degrees to 90 degrees and it holds me steady at 84-85 or whatever I set it at. Keeps the cold and heat out as well as it keeps the heat in. Also holds humidity pretty good. I dont use a fan but you could add one if you like.
The whole thing cost less than 30 bucks to put together without the T-stat. Thats your most expensive piece. But also your most important piece. Even with the Helix you're looking at a pretty gosh darn big incubator for well under $200. Not bad.
Annnnnnnnnd thats all folks!