The level of knowledge and quality of “good workmanship” has dropped immensely in the last 20-30 years. As examples:
In the last 5 weeks I have done a new house inspection (4,800 sq ft, $900,000 house with 2 HP/AC systems) in which the HVAC system (attic mounted) for upstairs had a return in the hall ceiling only. While blowing air, when you began closing a bedroom door, the rooms became pressurized and pushed the door closed. The other system serving the basement and main floor had no duct sealing and insulation.
3 weeks ago I did a late 70’s entry level side-by-side duplex ($190,000 each) with a return in every room. This morning I did a small 60-70’s 2 bedroom bungalow ($140,000) with 2 supplies in each larger room and a large return in every room. Both of the above houses had forced-air oil heat.
Sometimes even $900,000 can’t buy you a bit of QUALITY.