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thanks so much for the comments, points taken. Manufacturer's clearances for the coil and furnace, and the space created by these 5 foot pony walls--along with ~ 44" width of access door (probabably...

HVAC tech and I (and architect) are looking at the needed dimensions for the triangular space inside the attic 'pony wall' (5 ft high at the top of the triangle of the pony wall is current design;...

I'm hoping someone can help with a decision my tech and I are trying to make...for a 5-ton American Standard split system, what is the smallest diameter copper tubing that would be acceptable for the...

thanks travisfl, I'll collect those readings and post asap.

I wrote 'properly sized' as that's what my tech told me...his rule of thumb for our exceedingly hot/humid climate is 400 ft2/ton.

Even if the system were oversized, would that explain the problem...

could you elaborate?

775 ft2 house with a properly sized/matched 2 ton Goodman unit in Houston. Adequate ventillation of the attic space above the living space, 5 inches of R19 blow-in insulation. Attic well sealed...