LG LP1025WHSM portable air conditioner with heat review

The LG LP1025WHSM is the heat-equipped sibling to the LP1025WSSM, not a spelling variant. LG lists the same 10,200 BTU/h SACC and 14,000 BTU/h ASHRAE cooling figures, but the WHSM manual adds a Heat mode and makes a routed drain hose part of that operating plan. That water step—not the H suffix alone—is the decision to make before buying.

Cooling capacity is clear; the area claim is not

LG's U.S. page gives this model 10,200 BTU/h SACC and 14,000 BTU/h ASHRAE. Those are different methods; use SACC when comparing current portables against a DOE-capacity threshold. The page calls it suitable for up to 450 square feet, but an exact gallery graphic pairs 10,200 BTU with 350 square feet. Since the manufacturer disagrees with itself, neither area is a dependable cutoff. Consider sun, ceiling height, insulation, connected spaces and internal heat instead.

LG's listing prints a 12,000-BTU heating capacity, but does not identify that figure as SACC, ASHRAE or another test basis. Keep it separate from the labeled cooling values. The owner's manual describes a Heat setting and says the compressor runs to heat the room, but its temperature table is not an outdoor heat-pump operating limit. If you need a documented low-ambient threshold, this exact manual does not provide one; the finder therefore will not treat an unknown minimum as passing a winter-temperature requirement.

Heating means a drain plan, not just another mode button

The LP1025WHSM manual cover names this model, and its overview calls for a pump-drain hose in Heat mode. Heating instructions require that hose. At or near 32°F, LG directs indoor drainage into a bucket holding at least 28 ounces; check it often. Above freezing, outdoor drainage is allowed if the outlet is aimed away from surfaces water could damage. The window-panel bracket holds the hose, with at least eight inches through the fitting. This is a condition of using heat, not an optional convenience.

For cooling, LG describes a self-evaporative system. That reduces routine water handling in many conditions, but does not erase the collection tank: a full-tank FL indication stops operation until the tank is emptied. In Dry mode, the manual permits a separate 5/8-inch-ID garden hose for continuous drainage to a floor drain or bucket; that instruction is specifically labeled Dry mode only. Do not confuse the Dry-mode garden-hose port with the pump-drain connection required in Heat.

Window, exhaust and electrical fit

The included kit uses one flexible vent hose, diffuser and sliding-window panels. LG specifies openings from 20 1/2 to 39 15/16 inches wide for most vertical sliders, or the same span in height for horizontal sliders. Measure the clear opening in the direction the manual describes, then check that the cabinet can sit near enough to the panel without pulling, crushing or extending the supplied hose. The manual says this hose is designed for the product and warns against replacing or lengthening it with a nonspecific hose. This is a single-exhaust-hose plan, not the hose-in-hose arrangement used by a dual-hose model.

LG lists a 14 × 27 1/9 × 16 1/2-inch cabinet and 63.9-pound net weight. Leave extra space for the exhaust bend, filter access, pump outlet and panel bracket. Its manual requires a grounded 120-volt receptacle on a 15-amp circuit and prohibits extension cords, surge protectors and multi-outlet adapters. LG separately lists 115 V / 60 Hz; check the unit label and circuit rather than improvising with an adapter.

Controls and care

LG lists ThinQ/Wi-Fi, Alexa and Google Assistant, plus a remote, timer, auto swing and Auto Restart. The manual notes model-dependent ThinQ support and a 2.4-GHz network requirement. These features do not establish reliable connectivity or cooling speed. Sound claims conflict too: the page says as quiet as 50 dB on low, while its “High/Mid/Low” table gives only 54/51. No sound number is used to rank it.

LG lists a 7.9 CEER, confirmed by the EnergyGuide label for LP1025WHSM. That label estimates $119 per year using its stated 13-cent-per-kWh national average and a seasonal pattern of eight hours a day for three months; it is a comparison scenario, not your bill or an annual kWh figure. The washable filters should be cleaned every two weeks, more often if needed. The manual allows washing heavily soiled filters with mild detergent and drying them in the shade. Keep access to the lower collection-tank drain and the heat-mode hose connection when placing the cabinet.

Who should choose this exact model?

Consider the LP1025WHSM when you want 10,200 SACC cooling plus a documented heating mode, can route and monitor the required heat drain, have a compatible window opening, and value connected control. It is a poor fit if heat must work without a drain, if the outdoor minimum temperature is an essential requirement, if the opening falls outside the kit range, or if you need confirmed low-noise performance or an unambiguous square-foot claim. The same 10,200-SACC LP1025WSSM uses the same basic one-hose LG family concept but its exact manual lists Cool, Dry and Fan only; do not mistake it for this heater or assume it accepts heat drainage. The smaller LP0825WSSM has an 8,350-SACC rating and is cooling-only. If you need published outdoor heat limits, compare the exact Midea MAP10HS1XWGR-T or Whynter ARC-1050XPH documentation, each of which has a different manual and operating plan. For the suffix-by-suffix decision, see the LG WHSM vs WSSM guide.

Sources: LG's exact LP1025WHSM U.S. product page; the LG LP1025WHSM owner's manual copy hosted by Lowe's (the model is printed on its cover); and the LP1025WHSM EnergyGuide label copy hosted by Best Buy.