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.
Tax Billing Procedures. Tax Billing Procedures For Business, Personal, And Real Estate Taxes. Typically, Richmond County tax bills for business, personal, and real estate taxes are mailed in mid-September to taxpayers including those whose property taxes are to be paid from a mortgage company escrow account.