Are there any mini split systems which have air handlers that will fit between ceiling joists 16 OC? [on hold]

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Photo: unicosystem.com

If your home was built before the advent of air conditioning, you’ve likely bemoaned the fact that, for all its historic charm, the structure can’t accommodate this marvel of modern-day comfort, at least not with ease. Sure, in many homes, central AC wouldn’t be impossible to retrofit, but doing so would entail a sacrifice of space or architectural integrity, or both. So, rather than take drastic measures, you’ve settled for and have been living with a seemingly necessary evil—window units.

Sound familiar? If so, there’s something you need to know: Mini-duct HVAC, such as the Unico System, brings state-of-the-art cooling to virtually any home, no matter its age, without necessitating any sacrifice of space or style on the part of the homeowner. Whereas conventional ductwork typically requires a large amount of demolition and remodeling, flexible mini ducts snake though existing wall cavities and ceiling joists, fitting unobtrusively, almost...

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The ceiling beam, or ceiling joist, has two prime functions. The first is to tie the walls of a structure or a room together, effectively completing a box configuration. The second is, as the name implies, to support the ceiling of the structure, or room. Ceiling joist framing is undertaken after the walls are erected.

Ceiling joists are a number of horizontal beams, running parallel from one wall to the opposite wall of the structure. The beams are attached to the top of the wall at what’s known as the wall plate. A ceiling joist at the top floor of a structure may also support a flat roof, as well as the ceiling. If the roof of the structure is sloped, or pitched, each joist support is attached to a roof rafter, the angled roof support beams. This joist-and-rafter configuration prevents the sloped roof construction from pushing the walls of the structure outward.

Roof trusses are triangular forms used in construction of sloped roofs, and basically consist of rafters...

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Ceiling construction begins after all walls have been plumbed, aligned, and secured. One type of ceiling supports an attic area beneath a sloping (pitched) roof. Another type serves as the framework of a flat roof. When a building has two or more floors, the ceiling of a lower story is the floor of the story above.

One of the main structural functions of a ceiling frame is to tie together the outside walls of the building. When located under a pitched roof, the ceiling frame also resists the outward pressure placed on the walls by the roof rafters (fig. 1-60). The tops of interior partitions are fastened to the ceiling frame. In addition to supporting the attic area beneath the roof, the ceiling frame supports the weight of the finish ceiling materials, such as gypsum board or lath and plaster.

Figure 1-60. Ceiling frame tying exterior walls together.

JOISTS

Joists are the most important framing members of the ceiling. Their size, spacing, and...

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