First get your air flow low enough to get a 30^F delta T coil temp to optimized the dehumidification during normal cooling at your t-stat setting. By pass helps reduce duct sweating and fine tuning the air flow to get the ideal coil temp.
Originally Posted by jbarron4
Seldom does over drying with the a/c cause a problem because every evening is a partial load condition that benefits from peak cooling load dry down.
When there is low cooling loads, bypass or over-cooling is not an acceptable solution to providing <50%RH during low/no cooling loads.
Even a small whole house dehumidifier like the Ultra-Aire 70H provides <50%RH at fraction of the energy cost of any of the above fixes. These units remove upto 3 lbs. of moisture per hour without any over cooling at a < a kwh. Overcooling with the a/c always leaves a moisture loaded a/c coil which is enough moisture to re-humidify the home 8-10%RH at the end of the cooling cycle. Wlso when the home is unoccupied, the a/c can be setup and the dehu will keep the home <50%RH for minimal energy cost.
Keep us posted.
Bear Rules: Keep our home <50% RH summer, controls mites/mold and very comfortable.
Provide 60-100 cfm of fresh air when occupied to purge indoor pollutants and keep window dry during cold weather. T-stat setup/setback +8 hrs. saves energy
Use +Merv 10 air filter. -Don't forget the "Golden Rule"