CamperHardlyKnowHer

Newmar Mountain Aire 3825

Class Abuilt 2024– (in production)Better build tierPatient search on the used market
WHAT ONE COSTS
$902,700MSRP today

Still in production — a used 2023 would run roughly $622,800.

THE SPECS
Length38.8 ft
Height (incl. A/C)13.2 ft
Width8.5 ft
Interior height6.9 ft
GVWR54,000 lb
Dry weight41,000 lb
Sleeps4
Slide-outs3
Fresh water105 gal
Grey water80 gal
Black water60 gal
Air conditioning30,000 BTU
Fuel150 gal
GeneratorCummins Onan 10 kW diesel

A missing row means the maker never published that figure — unknown, not zero.

WHERE PEOPLE SLEEP
  • 1× king bed(Permanent)—
  • 1× convertible dinette(Convertible)—
  • 1× sofa sleeper(Convertible)—
HOW IT'S BUILT — 4/5
WallsLaminated fiberglass
FrameSteel
RoofWalk-on
UnderbellyEnclosed

Newmar (Better tier): Newmar Mountain Aire

YEAR BY YEAR — WHAT CHANGED
YEARSGVWRDRYMSRP
2024–2554,000 lb42,500 lb$902,652
2026–54,000 lb41,000 lb$902,652
  • 2024Introduced
  • 2027MSRP $902,652
FINDING ONE

Patient search — weeks of watching, and probably some travel. Why: still in production; priced at the top of its maker’s range. Estimated from build volume and production span — not a count of live listings.

THE READ

Three-slide 38-footer for couples - the same short chassis as the 3823 with a simpler layout.

OTHER MOUNTAIN AIRE FLOORPLANS
3823 · 54,000 lb · sleeps 54002 · 54,000 lb · sleeps 54018 · 54,000 lb · sleeps 54118 · 54,000 lb · sleeps 54360 · 44,600 lb · sleeps 54361 · 44,600 lb · sleeps 54364 · 44,600 lb · sleeps 54369 · 44,600 lb · sleeps 54372 · 44,600 lb · sleeps 54501 · 53,000 lb · sleeps 54503 · 53,000 lb · sleeps 54513 · 54,000 lb · sleeps 54519 · 54,000 lb · sleeps 54521 · 54,000 lb · sleeps 5the whole line →
Is the 3825 your #1 — or just a spec sheet?

These are the facts. Whether it beats the other six thousand rigs for you depends on what you care about — set your priorities as sliders and watch the whole market re-rank around them. Nothing gets hidden, everything gets explained.

Rank it against your setup →

Data compiled from manufacturer spec sheets, retrieved 2026-07.