Counterflow oil

[tomt]

I do not do residential work so could use some help here.Have a upflow oil fired furnace, ductwork comes out the top elbows down to floor runs under house.Want to replace with a oil fired counterflow furnance.
Question: already have new 3 ton coil and condenser,does coil have to be on the supply side of furnance or can it be in the return.
Has open return, putting in ducted return above ceiling.

[bob hubbard]

yes , The coil needs to be on the bottom of a cf furnace . Also you need a coil that rated for downflow such as a heatpump coil .

[tomt]

Thanks for setting me straight on this one, do not want to have any problems.