Nuna also sells these two together as the Nuna DEMI next + PIPA aire rx | Luxury Travel System.
This answer is for the Nuna DEMI next.
Key specs
Adapter
In the box
Whole set, list prices
$1650
Weight with carrier
32.2 lb
Seat rated to
30 lb, 30 in
On planes (FAA)
Yes
Stroller folded
L 23.5 x W 24 x H 35 in
Good to know before you click it on
Ring adapter mounts rear- or forward-facing in the upper mount; remove the infant carrier before folding. With the post adapters in the lower mount, close the canopy.
Post adapters: close the stroller canopy when the infant carrier is in the lower mount.
About this pair
The Nuna Pipa Aire RX goes on the Nuna DEMI next with the Nuna DEMI next car seat adapters (in the box), which ships with the stroller. With the carrier on, you are pushing about 32.2 lb (26 lb stroller, 6.2 lb carrier). The seat itself is rated up to 30 lb and up to 30 in, per Nuna.
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8 other infant seats fit the Nuna DEMI next.
Summary from the makers' published data.
How to set up the Nuna Pipa Aire RX on the Nuna DEMI next
What you need
The Nuna DEMI next
The Nuna Pipa Aire RX carrier (its car base stays in the car)
The Nuna DEMI next car seat adapters (in the box) — it comes in the box
Step by step
1Slide the two pieces of the ring adapter together.
2Place the ring on the upper seat mounts until it clicks.
3Place the car seat on the ring until it clicks; it can face rearward or forward.