CO2 absorbers increase circuit resistanceQ. Granule size is a compromise between high resistance & high absorptive surface area of small granules and lower resistance to gas & lesser absorptive surface area of larger granules (d/t channeling)Q Flow rate &tidal volume should not exceed the air space between absorbent granules; this will decrease CO2 absorption.Q The pa of tidal volume that does not undergo alveolar ventilation is referred as dead space; so any increase in dead space decreases CO2 absorption.">