The difference is where the vacuum happens. An edge sealer pumps air out through the bag's open end; a chamber sealer pumps air out of a box with the bag inside, so the pressure stays equal and liquids don't move.
Side by side
| Edge (countertop) | Chamber | |
|---|---|---|
| How it works | Clamps the bag mouth and pumps air out through it | Removes air from a sealed box around the whole bag |
| Liquids | Freeze first, or use a liquid or wet mode | Yes |
| Bags | Textured (embossed), about 17¢ each (Avid Armor 8 × 12 in) | Smooth pouches, about 12¢ each (Avid Armor 8 × 10 in) |
| Price | About $60 to $250 | $279 to $600 |
| Size and weight | Slim, a few pounds | About 14 × 12 in, 17 to 26 lb |
| Our pick | Anova Precision Pro | Anova Precision Chamber |
Liquids
With an edge sealer, liquid follows the air toward the pump and can ruin the seal. The fix is to freeze liquids flat first. A chamber sealer seals soup, stock and marinade directly. See how to vacuum seal liquids.
Running cost
Bags are the ongoing cost. At Avid Armor's prices, chamber pouches cost about 12 cents each and embossed bags about 17 cents. Over hundreds of bags a year, that difference starts to pay back a chamber sealer's higher price, but slowly. See chamber bags vs embossed bags.
Space
Edge sealers store in a cabinet or drawer. Chamber sealers weigh 17 to 26 lb and need a permanent spot, plus clearance for the lid (17 in for the Avid Armor USV20).
Which to choose
You mostly freeze meat, seal for sous vide and store pantry goods, and want something compact under $150.
You seal soups and marinades, process meat in bulk, or seal enough bags that cheaper pouches add up.
Questions
Can I use chamber pouches in an edge sealer?
No. Edge sealers need textured bags so air can escape; smooth pouches stall.
Can chamber sealers use embossed bags?
Usually yes, but you pay more per bag.
