What makes a forced air bator worth the extra $$?

[Tanichca]

I have enough money for either one! But anyway, Strombergs is having a sale, and I'm wondering if I should pay the $100 for a still air, or pay $42 more for a forced air. Whats the difference? I used a still air for my last hatch, got 19 out of 34 eggs (but the ones that didnt make it were all duds, so that doesnt really matter)
So, what makes a forced air worth it?

 

[Edwards' East of Eden]

Improved ventilation and diminished thermal layering makes it worth it. You can make a still air into a forced air for less than $42, though, if you want to do it yourself. Search for "pc fan" in the search box above.

 

[Tanichca]

Ah! Well, Im just a teen with little enough time as it is... and I do want enough money to get some eggs to hatch, silkies, silver phoenix, marans, etc.

 

[deerman]

One thing you can incubate different size eggs in forced air, still air you check temp top of egg, so harder to set different size eggs together

 

[rebelcowboysnb]

http://cmfarm.us/stillair.html

Still air incubators can work if you have a good temperature controlled house or you babysit the incubator all the time.