Below are the carbon and odor material weights in each filter. 

• 75i Fresh filter has 3.6 lbs of carbon
• 75i Odor has 3.4 lbs of carbon and 0.34 lbs of odor catalyst
• 45i Fresh filter has .66 lbs of carbon
• 45i Odor filter has .59 lbs of carbon and .07 lbs of odor catalyst
• 35i Fresh filter .50 lbs of carbon
• 35i Odor filter has .48 lbs of carbon and .12 lbs of odor catalyst
• 25i Fresh filter has .33 lbs of carbon
• 25i Odor filter has .3 lbs of carbon and .37 lbs of odor catalyst. 
• T500 Fresh filter has .25 lbs of carbon
• T500 Odor filter has .15 lbs of carbon and 0.02 lbs of odor catalyst
• Classic Fresh filter has 2.2 lbs of carbon
• Classic Odor filter has 2 lbs of carbon and .2 lbs of odor catalyst
• Classic VOC/Smoke filter has 2.7 lbs of Carbon
• Fit50 Fresh filter has 1.5 lbs of carbon
• Fit50 VOC/Fresh filter has 3.5 lbs of carbon