Anything wrong with a furnace in the attic in a four-unit?

[Dan C.]

A four-unit I was interested in has one furnace in the attic.

Anyone know if there is anything bad about a furnace in the attic? Is it something I would want to correct right away? (I would be buying the property to hold, not trying to flip it).

There is definitely plenty of room in the basement for a furnace.

The four-unit is fully occupied.

The three other furnaces are contained within each unit. This is somewhat unusual around here, but I have at least seen it before.

[Ryan O.]

@Dan C.

I'm just to the south of you and have come across attics in furnaces from time to time, usually older houses that didn't have A/C originally

I had a flip a couple of years ago where a second story addition was started but never finished, our only real option was to put a second furnace in the attic.

The building code required us to put in a high efficiency furnace (no make up air allowed from the attic), and the furnace had to be in a drywalled and insulated room, with a solid core self closing door. Oh yea it needed a switched light and a hardwired fire/CO detector in the room. Since it was a high efficiency condensing furnace it needed to be in a secondary drain pan with a drain tied into the buildings plumbing.