What is the difference between BIFMA G1 and BIFMA X5.1 for ergonomic chairs?

BIFMA standard differentiation at OfficeFurniture2go.com: X5.1 is our minimum specification requirement for commercial chairs — it verifies structural integrity and mechanism durability. BIFMA G1 compliance is an additional ergonomic quality specification we look for in chairs at the $400+ price point — it confirms the adjustability ranges meet ergonomic recommendations for the broadest possible user population. We specify both in combination for chairs targeting ergonomic applications. Call 1-800-460-0858.