Hi, Michelle.  I have some suggestions but may I start
at the beginning?  The dominant feature of an OH is
that it has one queen for 2 frames instead of one
queen for 10 or 20, thus it has "too much queen".
This will result in overpopulation and swarming.  So
an OH must be operated in conjunction with a full
sized hive so that frames of brood can be moved out of
the OH and replaced with empty ones.  What this leads
to is that the OH needs to have two frames of the same
size and the same size as the full size hive.  I
prefer deeps.

The next most important thing is that the clear space
between the two glass sides must not be less than
1-7/8 inch.  (Some (Kelley) are made 1-1/2 which is
the distance between the centers of frames 1-2 and
2-3, say, in a regular hive but does not take into
account that the bees in a regular hive have access to
the space between the comb faces of frames 1 and 3.
Bees and queens can move up into the upper "super"
with a 1-1/2 spacing but often do not.)  So call your
intended supplier and obtain that dimension before you
order.

Some (Kelley) provide more than 3/8 inch bee space
between the frames and the top and bottom which
sometimes encourages burr comb.  This question may be
harder to ask a supplier.

That said, I am involved with three Kelley OH kits,
the third of which I have modified in both ways and am
very happy with the results.  I have not examined any
other manufactur's product.  Please be sure to
understand that you will not be satisfied if the
spacing between the glass sides is insuffient.   Dan

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