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.
The combined sales tax rate for Houston, TX is 8.25%. This is the total of state, county and city sales tax rates. The Texas state sales tax rate is currently 6.25%. The Fort Bend County sales tax rate is 0%. Houston sales tax rate is 1%. Other Cities in Fort Bend County. Beasley; Booth; Clodine; Crabb; Fairchilds; Fresno; Fulshear; Guy; Houston; Katy; Kendleton