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Coop & Clutch

Aivituvin Mobile Expandable Hen House

The successor to the AIR31, and it keeps the thing that made the AIR31 worth writing about: measurements in the title, and no bird count beside them.

By Scooter M.Last reviewed October 24, 2026How we work the numbers out

We have not handled these coops, and we do not pretend to have. Here is what we did instead. Links to Amazon earn us a commission at no extra cost to you - disclosure.

Aivituvin Mobile Expandable Hen House - ranked
#CoopBest forHonest countPrice
1
Aivituvin Mobile Expandable Hen House, 81.9in
Aivituvin Mobile Expandable Hen House, 81.9inTop pickAivituvin prints the full dimensions in the listing title and no bird count beside them, which leaves the arithmetic to you - and the arithmetic says four.
A four-hen coop you can still move4no claim made
$199.99 - Amazon#ad

This coop replaced the AIR31 on this site, and it earned the slot the same way the AIR31 did. In a category where the listing title is where the inflated bird count usually lives, this one carries three measurements and no claim at all.

The measurement, and what it includes

81.9 inches by 28.9 inches is 2,367 square inches, or 16.4 square feet. That figure spans the whole unit, and on this model the whole unit is a raised house over an open run - so the enclosed portion where birds actually roost is a fraction of 16.4 square feet, not the whole of it.

There is no claim here to check the number against, which is the point. We print 16.4 square feet, note that it is a generous whole-unit reading, and leave the reader to draw the conclusion.

Depth is still the constraint

28.9 inches. That is the whole story on capacity, and no amount of length fixes it - a bird needs room to turn, to get away from another bird, and to sit on a roost with clearance front and back. At under thirty inches deep the usable roost space is limited regardless of how the length is arranged.

It is three inches deeper than the AIR31 was, which is a real improvement at this scale rather than a rounding difference - it is most of the extra three square feet.

What the listing actually promises

  • A two-section nesting box, which on the published one-nest-per-four-hens ratio covers the flock this coop holds.
  • Predator-resistant locks. The listing names them and does not say which mechanism, so treat this as a thing to check rather than a thing to trust - almost every coop in this category ships with a catch a raccoon can work.
  • A UV-resistant roof, which is a claim about the covering rather than about the timber under it.
  • Mobility, which is the practical difference from a fixed coop: the flock can be moved off ground it has scratched bare.

What it needs

The same three upgrades as everything else here - half-inch hardware cloth over the mesh it ships with, latches on every opening, and an apron under the raised run - plus annual treatment of the timber. And a realistic bird count, which in this case you have to supply yourself, because the maker sensibly did not.

The full write-up

Aivituvin Mobile Expandable Hen House, 81.9in

Top pick · A four-hen coop you can still move

Aivituvin Mobile Expandable Hen House, 81.9in

Aivituvin prints the full dimensions in the listing title and no bird count beside them, which leaves the arithmetic to you - and the arithmetic says four.

What the numbers say

Published footprint16.4 sq ftHonest count4 hensMaker claimsno claim

81.9in x 28.9in = 16.4 sq ft of whole-unit footprint, which includes the attached run and is therefore generous. At 4 sq ft per standard hen that is 4 birds. The maker publishes no bird count of its own to compare against.

Figures from Aivituvin published specifications (Amazon listing) · 81.9"L x 28.9"W x 43.6"H · Wood

16.4 sq ft across the whole unit, and that figure includes the open run beneath the raised house. The enclosed portion is a fraction of it.

Aivituvin states the length, width and height in the listing title itself and prints no bird count alongside them. In a category where the title is usually where the inflated number lives, a title carrying measurements instead is worth noting.

28.9 inches of depth is the constraint, as it is on every coop of this shape. Length is cheap to add and depth is not, and a bird needs clearance front and back of the roost rather than more bar.

The two-section nesting box and the predator-resistant locks are both named on the listing. The locks are worth checking rather than trusting - every coop in this category ships with catches a raccoon can work, and this listing does not say which mechanism it uses.

Good

  • Publishes full dimensions in the listing title, with no bird count to correct
  • Two-section nesting box included
  • Mobile, so the flock can be moved off worn ground
  • UV-resistant roof as described on the listing

Not so good

  • 28.9in depth limits usable roost space whatever the length
  • Whole-unit footprint counts the run beneath, not just the house
  • Lock mechanism is not specified, so predator-proofing still needs checking
  • Wood needs re-treating, as every fir coop in this category does

Skip this if: you have five or more standard hens. The depth is the constraint and no amount of length fixes a 28.9in-wide house.

$199.99 - View on Amazon

#ad · how this is funded · price as of October 24, 2026

Published dimensions against the maker’s own bird count
CoopPublished sizeFloor areaMaker saysArithmetic says
Aivituvin Mobile Expandable Hen House, 81.9in81.9"L x 28.9"W x 43.6"H16.4 sq ftno claim4 hens

Floor area is the maker’s published footprint. Where a unit includes an attached run that figure spans the run too, which makes it a generous reading - the enclosed roosting floor is smaller still. How we work these out.

The comparison worth reading

The Aivituvin against the Formex Snap Lock puts this coop next to the plastic alternative in the same size class, and it is the clearest illustration on the site of what whole-unit versus enclosed measurement actually means.

Questions people actually ask

+How many chickens does the Aivituvin expandable hen house hold?
Four standard hens on the published figures, and three is the number we would plan around. The published 81.9 by 28.9 inch footprint is 16.4 square feet, and that spans the open run beneath the raised house as well as the enclosed portion. Aivituvin publishes no bird count for this model, so the figure is ours from their dimensions.
+What happened to the Aivituvin AIR31?
It is discontinued - as of 2026-10-24 it no longer resolves to a buyable listing and no AIR31 appears in Aivituvin's current range. This model is the nearest current equivalent: the same raised-house-over-a-run format in the same price band, three inches deeper, and with the same absence of a bird-count claim. The AIR31 review is still on the site with the measurements we took.
+Is it a good sign that a coop lists no bird count?
We treat it as one. A maker that publishes dimensions without printing a bird count has left the arithmetic to the buyer rather than supplying a number that cannot survive it. There is nothing on this listing for us to correct, which is more than can be said for most of the category.
+Is a mobile coop better than a fixed one?
Only up to about four standard hens, which is roughly where this coop sits. A structure light enough to move cannot carry much floor area, and it cannot carry a buried predator apron either. Chicken tractor against a stationary coop works through the trade in full.

Sources

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