Installing a new HVAC system in Houston requires specialized expertise in high-humidity load calculations. Manual J calculations for Houston homes must account for the latent heat load — the moisture content of Houston's air — not just sensible temperature. An undersized or improperly specified system short-cycles and fails to dehumidify, creating indoor humidity problems even when the temperature reads comfortable. Most Houston installations specify heat pump systems or high-SEER2 split systems with efficient humidity management. New system costs in Houston run $5,500–$16,000. All work requires a Texas TDLR-licensed contractor and a Harris County or city mechanical permit. Contractors below serve Houston, Katy, Sugar Land, The Woodlands, Pearland, Cypress, Spring, and surrounding communities.