[kbd]

sometimes when u win you really lose (btu's)

With V Speed There Are So Many Potential Problems That Can Exist. First Is Installation. (Attic, Horizontal-vertical, Filters, Settings,) Next Is Existing Duct Work (Big Enough?, Return-supply, Leaks In Return-supply). Most People Think "Well If It Is V-speed Then It Will Push The Air Though The Duct Work" And It Will. The Equation We All Over Look Is That External Static Pressure Effects Latent And Sensible Percentages And Ability For The Coil To Properly Drain Condensate. And the most important-Actual Btu Performance Output. My Suggestion Is Find A Professional That Can Scientifically And Mathematically Tell You If Your System Is Producing The Proper Btu's That It Is Rated For. Ensuring That External Static Pressures Are With The Designed Static That The Unit Is Rated At. The 70/30 Latent And Sensible Equation. With That All Your Problems Will Disappear And You Will Benefit On Comfort And Savings. There Was A Independent Study Done That Stated "on An Average, Homes Are Only Producing 57% Of Its Rated Btu's." calc. that $$$$$$$$