Size of air holes in still air incubators. What size are yours for how many eggs?

[Berryworm]

Hi,
I am transforming a forced air incubator with a broken fan into a still air incubator. I think that the size of the air holes should be bigger, but don't know how much.

Could you share how big the air vents are in your incubators, especially for still air incubators?

My forced air incubator had 2 holes of 6 mm / 1/4 inc each, for 8 eggs, located below the eggs.


For the ones liking calculations:
According to the poultrysite.org, 1000 eggs need 216 ft3 / 6.1 m3 of air per day, but I have no idea how much air exchange there is through holes.
https://www.thepoultrysite.com/articles/air-requirements-during-incubation

 

[ronott1]

Hi,
I am transforming a forced air incubator with a broken fan into a still air incubator. I think that the size of the air holes should be bigger, but don't know how much.

Could you share how big the air vents are in your incubators, especially for still air incubators?

My forced air incubator had 2 holes of 6 mm / 1/4 inc each, for 8 eggs, located below the eggs.


For the ones liking calculations:
According to the poultrysite.org, 1000 eggs need 216 ft3 / 6.1 m3 of air per day, but I have no idea how much air exchange there is through holes.
https://www.thepoultrysite.com/articles/air-requirements-during-incubation

I do not think that the air hole size will make a difference.

Incubator warehouse sells replacement fans. Forced air is much better than still air for hatch rates

 

[EggSighted4Life]

Hi,
I am transforming a forced air incubator with a broken fan into a still air incubator. I think that the size of the air holes should be bigger, but don't know how much.

Could you share how big the air vents are in your incubators, especially for still air incubators?

My forced air incubator had 2 holes of 6 mm / 1/4 inc each, for 8 eggs, located below the eggs.


For the ones liking calculations:
According to the poultrysite.org, 1000 eggs need 216 ft3 / 6.1 m3 of air per day, but I have no idea how much air exchange there is through holes.
https://www.thepoultrysite.com/articles/air-requirements-during-incubation

Actually I get better hatches in still air than forced.. but folks do seem to love the forced.

They sell it with a fan kit as well.. with or without fan shouldn't change the size or number of holes IMO.. I used the 1602N..

https://incubatorwarehouse.com/egg-incubators/combokits/hova-bator-1602n-combo-kits.html

My forced air bator, Genesis 1588 also had the two holes on top and several around the outside bottom. Closing the holes on top helped to increase humidity.. so more holes is gonna equal harder temp/humidity control to me.. maybe checking out some of the DIY bator threads or articles button will give more information than what I have??

Which bator is it that you're transforming? Insulation is a factor.. thin plastic bators are PROBABLY lousy for still air purposes. The styro ones seem okay.. I still need to add blankets to the outside to reach temp on wafer style when my house is only 58. At 62 degrees, they all seem fine without added insulation.

Rotate eggs to new place inside bator to combat warm/cool spots and tighten hatch frame, measure temp at TOP of egg but not touching them in STILL air.. around 101.5 - 102 instead of 99.5-100.. to get hatches on day 21.