When designing an HVAC system, remember that... When you design an HVAC system, remember that: 1  All AHU rooms must have a floor drain, as condensation from the air will collect in the unit.  One should provide fresh air to every AHU.
The sales tax in Richmond located in Fort Bend is 8.25% which is above the Texas average of 7.25%. All Fort Bend Sales Tax âº.
City of Richmond 2.00% *. State of Texas 6.25%. Total Sales Tax Rate 8.25%. * Includes 25% earmarked for economic development by the Richmond Development Corporation. Property Tax (Ad Valorem) - 2016 Tax Year : City of Richmond (Maintenance & Operations) $0.5252/$100 Value. City of Richmond (Debt Service) $0.2098/$100 Value.