Ryland Homes CalAtlantic Homes We bought a new Ryland home in Orlando FL in 2006. The AC system was improperly designed as they used a 2-ton cooling system to service a single 280 sq ft room. HVAC experts puzzled over this design. The poor design led to continual dampness and rampant mold growth in that room’s air handling system. Orlando FL Nationwide!!. I bought a Ryland Home in Orlando in 2006. The HVAC system was improperly designed. They used a 2-ton cooling system to service one 280 square foot room of the house. HVAC experts puzzled over this design. Because the AC system was oversized the room was continually humid. This caused rampant mold growth in that room’s air handling system.