My parents have an 1850 sq ft house, two floors, divided evenly in sq. footage. To expand the kitchen they moved the heater (new Trane installed) from the main floor to the attic; the thermostat is still on the main floor. They removed a wall on the main floor and now it feels like one big room with one partial wall dividing it. Upstairs is still the same as far as warmth, but my mother feels that the main floor is cooler. She thinks it has something to do with the heater being up in the attic, but I'm wondering if the greater air flow on main floor doesn't keep the heat as concentrated. Any ideas or recommendations would be appreciated. My mother is retired now and tries to keep expenses to a minimum but she also gets cold easily. If this could be corrected it would ease her mind. Thank you.

Sounds like moving the aTrane to the attic was a mistake, its hard to say ,was the duct work change any, Its much easier for a furnace to blow heat up like from the first floor toward the upstairs, then for it to blow down from attic to the first floor,, It might would help to close off some heat supply vents on the second floor so more heat can go where needed the most,, How about the return s,where are they ? How many?

Thank you for your response and I apologize for my delay in return. I am trying to assist my parents long distance and couldn't remember how many returns they had since the remodel. There are two returns, one on the upper floor in middle of hallway between all rooms and another on main floor just around corner, but next to, stairway to upstairs. Thanks again for your help.

Was the equipment relocated by an HVAC contractor? If so, take up your complaint with them.

Unfortunately, the whole remodel was general contractor which also included some plumbing in the kitchen that didn't work right either. Overall, they did a decent job with the exception of these two problems that may have not been their forte, or had subs that weren't up to par. Unfortunately, this remodel is already 5 years old. My parents are both having health issues so addressing the past is more difficult than dealing with just the now.
But your input is greatly appreciated, so thank you for your time.