What Size Ducts Do Different Types Of Air Conditioners Need?
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We currently have an evaporatative ducted air conditioner which has to be replaced, we were hoping to get a refrigerated reverse cycle unit instead but the air contioning mechanic told me that the ducting we have would not be suitable.
Which ducting has the largest diameter, evoporative or refrigerated? I am worried about what the holes in our ceiling will look like if we do decide to change.
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I’m sure you’ll get a better answer, but on the off chance that you don’t, I’ll give a shot at this one.
First, you should ask your a/c mechanic what s/he meant about the ducting not being suitable. Go ahead and make a pest of yourself – that’s what you pay people for. I would ask:
In what ways isn’t the existing ductwork suitable?
How much would it cost to upgrade the ductwork?
What would it look like once it’s upgraded?
What would happen if we just went ahead and used the non-suitable duct-work?
Can the new ductwork fit inside the old, or would stuff need to be ripped out?
Would the visible vents needs to be changed, or just the ductwork?
Can the new ductwork easily fit inside our walls/ceiling/floors, or would major modifications be needed?
Are there several grades of new ductwork that we could consider – like adding extra insulation – or is there just one type of upgrade?
Is there a reason we should think about replacing the old ductwork, even if we don’t upgrade the a/c?
But then, I’m a pest.
My guess is (and it’s only a guess as an HVAC-type engineer, not as someone who actually installs this stuff) that the refrigerated ductwork will carry air that is COLDER than what is sent around your house now. As a result, the new ductwork will be SMALLER, so that the cold air actually gets where it needs to be instead of stalling in the middle of some oversized ductwork. If this is the case, then perhaps you can make the hidden ductwork smaller, but just leave the vents the same? That’s my guess – but then, I’d go ahead and ask the gal or guy who knows your system. Heck, ask two or three of ‘em just to be sure. They’re the experts.
Good luck.