My mom is trying to replace 2 gas furnices and A/C units with one. The newest unit is 35 years old.
She is looking at a 93+ effeciency with a 15.5 SEER A/c unit.
1. One contractor stated that humidifiers were manditory for 93+ furnaces. Is that correct? Mom lives in Iowa
2. A different contractor want to change the pipes for a 16 x 8 to a 20 x8, 16 x8, 12 x8, 10 x8. He stated that by not changing the pipes it would be noisy. Is this correct?
3. A third one want to run a pipe across the ceiling to a sink in the basement when there is a drain close to the furnace. Any ideas?