Both countertop distillers and countertop reverse osmosis systems offer high PFAS removal without requiring permanent plumbing installation. Comparing them across key dimensions helps consumers choose the right approach for their situation.
PFAS Removal Performance
Both technologies achieve excellent PFAS removal for common long-chain compounds. Distillation removes PFAS by leaving them behind in the boiling chamber, achieving removal rates exceeding 99% for most compounds. RO removes PFAS through membrane rejection, with certified systems typically achieving 96 to 99% removal. For short-chain PFAS, distillation maintains its advantage since it operates on a fundamentally different principle — retention in the liquid phase — that does not depend on molecular size or charge characteristics.
Practical Operation
Distillers are slow (1 gallon per 4–6 hours), use significant electricity (roughly 1 kWh per gallon), and require regular cleaning of the boiling chamber where mineral scale and contaminant residue accumulate. Countertop RO systems produce water more quickly, require less electricity, but produce reject water and require periodic filter and membrane replacement. RO systems also require connection to a cold water faucet, while distillers operate independently using only an electrical outlet.
Long-Term Costs
Distillers have minimal consumable costs — periodic cleaning solution and occasional post-carbon filter replacement. RO systems require regular filter cartridge and periodic membrane replacement. Over a 5-year period, distiller operating costs (primarily electricity) typically exceed RO consumable costs for high-usage households, while the reverse may be true for lower-usage situations.