MagicPak (apt 'thru-the-wall' stuff)
And they actually build old dedicated horizontals as well as an oil fired version of the dedicated horizontal. No VS ded-horiz as far as I know... <grin>
Locally, they are sold by C C Dickson; I was a guest to the factory 'Red Carpet' tour in February.
I have a background that includes some understanding of manufacturing processes... and I was impressed with the AlliedAir plant.
Regardless of which product you buy (except magicpak), the furnace will be from the Lennox plant, and the coil will be from ADP (coils all have microban technology included). Only the AC's, HP's, pack units, and AH's come from SC.
I have been installing AirEase and Ducane for about a year now (left Ruud); I think AlliedAir is a good quality product at a very reasonable price.