Space heater reviews, built from published specifications

What a review here contains, and what it does not

Every competitor ranking for these terms pairs the word “best” with a testing claim — lab-tested, expert-tested, tried and tested. We cannot honestly make that claim, so we do not make it, and we are not going to imply it with a score out of ten either.

What each review does contain: the published rated wattage and, where the maker publishes one, the low setting. The current draw computed from that wattage, and whether it fits a 15 A or 20 A circuit as a continuous load. The room size that wattage covers at 10 W per square foot, with the insulation and ceiling corrections stated. The cost per hour, per eight-hour night and per month at a published electricity rate with a date on it. The safety listing the manufacturer publishes — or a plain statement that none is published and you should check the rating plate. A full specification table with a source for every line. And a paragraph on what the unit is not for.

What no review here contains: a star rating from us, a claim about how it performed in a room we do not have, a durability judgment we could not have formed, or a price typed into the page. Prices come from the live retail layer or the page says “check price” and links you to the listing.

Where these units came from

The models covered here are the ones that ranking publishers currently recommend and that are actually purchasable on Amazon right now. Every ASIN referenced on this site was read off a live Amazon detail page during the build; where a listing could not be confirmed, the buy link is a search rather than a pinned page, because a dead link is worse than an extra click.

The reviews deliberately span all four heater types, because the type you need is decided by the room, not by a ranking. There is a ceramic tower, a fan-forced vortex unit, an oil-filled radiator, an infrared cabinet and a wall-mounted infrared panel — and each one is genuinely the wrong answer for some of the others' rooms, which every write-up says outright. At the two ends of the range sit a hardwired 7,500 W garage unit and a silent digital radiator with a child lock, which between them cover the two rooms a plug-in ceramic heater cannot.

Reading a review against your own room

A review is only meaningful relative to a room and an electricity rate. Before you read one, work out the wattage your room needs on the sizing calculator, and check what an hour costs at your rate on the cost calculator. Then the specification table stops being a list and starts being an answer.