Rick_A said:
The ale is a good idea, but the quality of my work might suffer a bit. On the other hand, maybe that's what I need to improve the quality
Actually, I'm going to get a price on tapping into my main AC system - my only option for exhuast is thru or under the garage door.
Just a caution note on this:
You'll see new home models, where the garage door has a temporary wall, sliding glass doors, and perhaps a few heat/ac vents tapped off the main system ---- temporary.
But legally, from a building code view, we no longer tap off the main HVAC systems to garages. It's because the construction of homes, is much tighter these days in regards to air infiltration.
If airflow is pushed out into the garage, instead of recirculated within the home, air from other sources will try to replace it. This air could come in from an outside combustion air vent, and even down through the furnace & water heater flues.
Modern furnaces will now shut off with a backdraft, but water heaters might spill carbon monoxide. In the winter, the water heater vent might actually become cold, as the cold replacement air is flowing down through the flue pipe.
As you can see, it's the winter months that have a much more dangerous effect, than summer months, even though the water heater has a potential to spill fumes. At worse, the home is sucking in hot air, where possible.
And then of course, older houses are not as tightly constructed. And depending on location, the water heaters may be electric, and "gasless" heat pumps are doing the heating and cooling instead of natural gas or propane.
When I started my RV, I actually did, tap off the main system, with insulated flex piping to a small insulated shed for heat, and a wall unit for A/C.
L.Adamson -- HVAC contractor