I have an older house that had some bad DIY duct work done from the previous owner. There was also no cold air return in the basement or upstairs. There was steel pipe gas lines running through the stairway to the basement which one needed to duck under.
I had a few companies come take a look. Oosterveld didn't try to up sell any additional products. A lot of companies just want to sell an AC or furnace. Oosterveld is also local and family owned. So I chose them.
HVAC: We added a cold air return to the basement and upstairs. A few extra heat runs in the basement. No more huge temperature differences from floor to floor, and the basement is much cozier.
Gas: The steel pipe gas lines were replaced with flex line routed through properly. Shut offs added for each appliance with a nice manifold in the utility room. A lot of small things fixed - out dated fittings / unions, repairs loose vent pipes (major safety issue for CO poisoning), and found a few issues next door at the neighbours that they also fixed.
The technicians were great. Very professional and hard working guys. Cleaned up afterwards. I worked with them for a few days, Spencer and Peter treated the place as if it were their own.
Would hire them again.