Earlier portable compressor models
TOSOT’s discontinued 20-, 35- and 50-pint models: compare exact drain routes
TOSOT Direct’s discontinued dehumidifiers are easiest to compare by the exact retail code and the path water takes out of the machine. The current collection shows four unavailable TST-NDHM listings: 20-pint, 35-pint, 50-pint without a pump and 50-pint with an internal pump. The last two are separate configurations even though their published capacities and cabinet dimensions are nearly the same.
Do not compare old and new DOE pint figures as if they share a test
The exact product pages give current 2019 DOE classes of 20, 35 or 50 pints per day and also show former 2012 DOE comparisons of 30, 50 or 70 pints. The more detailed specification row lists 21.11, 35.27 or 49.58 pints/day. Use the detailed number when applying a strict numeric threshold, and the standard class when comparing the manufacturer’s rounded category. None is a measured result for your room. The accompanying room-area suggestions are not guarantees for a divided basement, unusual ceiling height or a space with a continuing leak.
Bucket size follows the lineup, but a bucket is still a chore
The 20-pint model has a 1-gallon (7-pint) bucket, the 35-pint model has 1.5 gallons (9 pints), and each 50-pint model has 2 gallons (13 pints). A bigger tank can reduce how often you empty it, but actual fill intervals depend on operating conditions. Full-tank protection stops the machine until the bucket is emptied and correctly replaced.
All four exact TST pages list a garden-hose gravity-drain option with a ¾-inch female connection. A gravity line must slope down to a lower outlet; it cannot lift water to a sink above the appliance. Only the P listing explicitly confirms an internal pump. TOSOT’s product-document index maps that exact retail page to GDN50BA-A3EBA2F; the family manual’s pump instructions allow up to 15 feet vertically or horizontally for that pump configuration. The manual does not give the supplied hose’s total length or a combined route allowance, so keep hose-reach and lift requirements distinct. Do not infer bucketless operation: the exact retail pages do not document it.
Placement and operating conditions are not a footnote
The cabinets grow from 13.38 inches wide, 19.49 high and 9.84 deep on the 20-pint version to about 14.76 wide, 24.02 high and 11.38 deep on both 50-pint variants. Dry weight rises from about 31 pounds to 43.7 pounds without the pump and 44.1 with it. Measure where the unit will sit, how the bucket comes out and where the hose runs. The manufacturer lists an indoor operating range of 41–90°F, three fan speeds and a washable filter. The exact-page FAQ recommends filter cleaning every 30 operating days; the crosswalked GDN family manual adds a reminder after 250 operating hours. Follow the actual unit’s indicator and supplied instructions.
Which family member fits a known need?
The 20-pint model is the smallest cabinet and the lowest published capacity tier, with the smallest bucket. The 35-pint version steps up the rating and tank volume but remains a gravity-only unit. The standard 50-pint TST-NDHM-50WHT has the same general class and tank size as the P version but no pump; choose it when a bucket or lower gravity drain is enough. The TST-NDHM-50WHT-P is the only listing with an internal pump, yet a precise raised-drain plan still requires its exact lift and hose instructions. A pump is not a universal upgrade if the water already has a downhill path.
All four current TOSOT Direct product listings identify themselves as discontinued and unavailable. These assessments are useful for existing owners, model identification or a specific used/clearance comparison; they should not be mistaken for current new-stock recommendations. Verify the suffix printed on the appliance and find the manual for that exact unit. For persistent water intrusion, repair the source instead of expecting a portable dehumidifier to solve a building problem.