LG LD451EGL Low-Temperature 45-Pint Dehumidifier review

LG’s U.S. support record identifies the LD451EGL as a 45-pint dehumidifier, and its specification sheet describes a low-temperature model with a 21-pint bucket and gravity-drain connector. This dated model is most useful as an owner or used-unit reference: its practical fit depends on accepting a fitted bucket or a downhill hose, not an upward pump route.

Sources: LG’s exact LD451EGL U.S. support page lists its 2012 English owner manual and 2019 specification sheet; the LG specification sheet names the model and publishes its measurements. The owner manual is P/NO MFL63261217 and identifies LD451EGL alongside LD450EAL.

The LG support page links this model image. It shows a pale gray, rounded cabinet with a front grille, top controls, lower bucket seam and casters. LG’s page cautions that images may be simulated or dramatized; whether this image is a photograph or a rendering is unknown.

A dated 45-pint rating, not a room-output promise

The exact model sheet lists 45 pints per day, an integrated energy factor of 1.50 L/kWh, and 590 watts at 115 volts, 60 Hz. It does not state the capacity test conditions, so the 45-pint label should not be treated as a same-condition comparison with newer ratings whose procedures may differ. Nor does it promise that the unit will remove 45 pints from every room: moisture load, room temperature, humidity and airflow affect actual collection. The documents do not support a specific square-foot coverage promise.

There is a useful practical mismatch to keep in mind: 45 pints is the published daily removal class, while the removable tank holds 21 pints. In bucket mode, a very damp room can call for emptying before a full day has passed. That is ordinary operation, not a failure of the published rating. LG lists the bucket-full indicator and automatic shutoff; the manual says the fan and compressor stop when the bucket is full or not seated correctly.

Choose between carrying the bucket and routing a hose downhill

The manual describes two supported water plans. You can collect water in the fitted 21-pint tank and empty it by hand, or connect a standard garden hose to the external drain connector and lead it to a lower drain. For gravity drainage, the hose needs to lie flat and avoid kinks; follow the manual’s connector instructions and reinstall the bucket in its proper position before operation. The manual tells the owner to attach a garden hose, but does not establish that one is included.

Neither the exact specification nor the owner manual documents a built-in pump, so an uphill route is not a supported plan. The manual also says the appliance must have its bucket properly installed to operate; it does not establish a bucketless mode. If the drain is above the unit, or you require operation without the tank, look for an exact-model manual that documents that capability rather than assuming that the drain connector can lift water.

Low-temperature operation has a defined limit

The model sheet’s low-temperature specification is 42°F. Its paired manual distinguishes a standard version, which may not operate efficiently below 65°F, from a low-temperature version, which may not operate efficiently below 42°F; the exact LD451EGL sheet identifies this model as operating at the 42°F threshold. This is more relevant to a cool basement than the headline pint count. It is not evidence that the compressor can work efficiently below 42°F, and the manual notes that low temperatures can frost the coils.

The control panel sets humidity between 35% and 70% RH in five-point steps, with high and low fan choices. Its timer selects repeating two-hour or four-hour on/off cycles; it is not simply a delayed-start timer. The manual also documents automatic restart after a power outage and bucket-full shutoff. These are useful basic controls, but the model-specific sources do not document app control or a remote monitoring plan, so do not count it as a connected appliance for an essential app requirement.

Placement and upkeep are part of the fit

LG lists a cabinet about 15 5/32 inches wide, 21 1/4 inches high and 13 3/8 inches deep, at 45.19 pounds dry. The manual calls for at least 12 inches of open space on every side, and says a shelf or table must safely support around 90 pounds with a full tank. Leave room to pull the front bucket out and avoid a location where a drain hose can kink or spill. LG’s sheet lists 51/49 dBA at the front on high/low and 52/50 dBA at the back; those are published specifications, not an independent noise test.

Routine maintenance is simple but not zero: the manual says to clean the washable filter every two weeks, keep the bucket clean and clear the airflow. It also warns against using collected water for drinking and calls for a grounded outlet and dedicated circuit. Because this is a legacy design, check the control panel, bucket, hose connector, filter and power cord on any used unit; do not infer present condition, parts availability, price or remaining life from the model number.

Who should keep it on the comparison list

The LD451EGL is a plausible fit for someone identifying an existing unit, or comparing used examples, who needs the published 45-pint class, has a room that may be as cool as 42°F, and can use a bucket or lower gravity drain. It is a poor match for an essential pump-lift route, documented bucketless operation, or app control. For a new purchase, compare current models against the drainage setup, measured cabinet opening and published capacity procedure you actually need; this old model’s 45-pint label and “LoDecibel” branding are not substitutes for those checks.