.6 ducting vs 1.1 ducting does it matter

I have two quotes for my evap

One is the Brivis contour L53 installed to 8 points with .6 ducting for $3750

The other is the same model and ducts but with 1.1 triple insulated ducting but it is $4800

Is it worth the extra $$$$ to have the better ducting?

for evap cooling i would say no.

we did a little experiment here. took a 100w light bulb and put it in a r0.6 duct for a day. at the end of the day you could feel heat on the outside of the bag. we did the same thing with a r1.0 duct and you couldn't feel anything on the outside. we took temperature measurements etc but it was years ago...

so in short - the better the insulation the more heating/cooling you keep in your ducts. but evap cooling moves so much air so fast and so cheaply that it is not worth spending 1000 more

Penny I have just booked my evap cooler and most places will upgrade you at no charge. Just tell them that you want it.

$4800 sounds very expensive for that unit. You can get the breezeair for cheaper with the R1.1 ducting.

I did ask about upgrading the ducting but it was another $800.

Is $3750 a good price with the cheaper ducting?