Please consult a licensed contractor in all your repairs. These are just a few examples that could have cost someone their lives.
We see a Rinnai water heater which needs special piping ran in the wrong material going down hill. Installed by an "engineeer".
We see a water heater flue ran in the wrong materila(dryer vent) running down hill and tee'd into the actual dryer vent.
High voltage wiring without the proper connectors.