When choosing furniture or custom cabinets, it’s important to understand the environmental safety standards behind the materials. E1 and E0 are European formaldehyde emission standards that measure how much formaldehyde a board releases into the air. E1 boards are safe for indoor use, while E0 boards have even lower emissions, making them more eco-friendly and ideal for bedrooms or children’s spaces. CARB, which stands for California Air Resources Board, is an American standard known for being even stricter — especially CARB Phase 2, which requires extremely low formaldehyde levels. In short, the lower the rating, the healthier and safer the material. Choosing E0 or CARB-certified boards means cleaner air and a safer home environment.