Space Heater Coverage Claim Comparator

Last updated 2026-08-21

Every plug-in space heater sold in the US tops out at 1500 watts — it's the most a standard 120V household outlet can deliver. That means almost every heater on the market, whatever the brand, is drawing the identical amount of electricity and, because resistive heating is essentially 100% efficient, producing the identical amount of heat: about 5,118 BTU/hr. What isn't identical is what each brand's own page claims that heat will cover. We fetched five brands' own current 1500W product pages directly and found real, named square-footage claims to compare — and two more brands whose own pages state no square-footage number at all.

The same 1500 watts, claimed to cover very different rooms Lasko's own page claims 300 sq ft. Comfort Zone's own page claims 150 sq ft — half that. Pelonis sells two different 1500W heaters on its own site whose own spec tables disagree with each other: 230 sq ft for its oil-filled model, 107.6 sq ft for its fan-forced model. None of this is explained by wattage, since the wattage is the same number on every one of these pages.

Dreo's own page states two different numbers for the same heater Dreo's Atom Core page leads with a feature-bullet claim of "Heating Coverage: 200 sq.ft," but its own specifications table further down the same page separately states "Room Size Range: 100-300 sq. ft." — a range three times as wide as the single number the page opens with. This tool uses Dreo's own 200 sq ft headline figure below; its own wider range is reported here rather than picked silently.

Honeywell and Vornado: two brands with no number above

Honeywell's own page for the HCE322V states a room-size category — "Medium to Large" — but never a square-footage figure, even though Honeywell sells 1500W heaters into the identical market as every brand above that does state one. Vornado's own page for the VH200 goes further and states no room-size information of any kind — not a number, not even a qualitative label. Both are real, checked absences on each brand's own current page, not an assumption that they don't have a number somewhere else.

Every claim, every brand, unfiltered

This table doesn't depend on what you typed above — it's every figure this page cites, straight from each brand's own current page, all at the same 1500 watts.

Brand	Model	Their own stated claim
Lasko	5586 Digital Ceramic Tower Heater	300 sq ft
Pelonis	1500W Oil-Filled Radiant Heater	230 sq ft
Dreo	Atom Core	200 sq ft
Comfort Zone	Oscillating Desktop Space Heater	150 sq ft
Pelonis	1500W 3-Speed Fan-Forced Heater	107.6 sq ft
Honeywell	HCE322V Digital Ceramic Tower Heater	No number stated
Vornado	VH200	No number stated

What this does not do

It compares one 1500W model per brand (two for Pelonis, since its own two models disagree) — not every wattage or every model each brand sells.
These are the brands' own marketing claims, not an independent, repeated, third-party test in a shared room under shared conditions. No test method is stated on any of the five pages this tool cites, unlike, say, Igloo's own stated 90°F/39°F cooler test method on this site's cooler comparator.
De'Longhi is not shown. Its own domain blocked direct fetching on every URL tried this session, including its space-heater category page — its absence is a sourcing gap, not a claim that it under- or over-states its coverage.
It does not explain WHY the claims differ this much for identical wattage — only that they do, and that the wattage itself does not explain it.

Runs entirely in your browser. Nothing you type is sent anywhere. The cooler ice retention comparator found the same "named brands' own current claims disagree, and one brand refuses to state a number at all" shape in a different market. The portable AC BTU coverage comparator found it again in a market with an actual federal standard (SACC) meant to prevent exactly this disagreement. The generator noise level claim comparator found a variant of it: a single named brand disclosing its own figure under different, incompatible test conditions across its own product lines.