How warm should the brooder be?

[KTpekin]

Hi all just wondering how warm should the underneath of
The brooder be?
I am using the brinsea Eco chick 20. It has been running
since this morning.
I was planning to be able to put my 6 new pekin chicks
under it tomorrow.
Thanks

 

[Chuck]

37.5 approx, same temp as the incubator.

 

[serama1]

Just for information: I used to have Seramas, I found the chicks needed slightly higher temprature than other breeds and did very well with this.