How we pick, and what we refuse to claim

What we do

1. Build the candidate set from what is actually sold. We start from what Amazon currently stocks in the category, because a recommendation for something you cannot buy is not a recommendation.
2. Compile the published specifications. From the manufacturer’s own product page, spec sheet or manual. The exact document is linked on the page that uses it, in the spec table, next to the figure it supports.
3. Do the arithmetic. Running cost, payback period, cost per winter, and the prevention-versus-repair comparison. The inputs are stated so you can redo the sum with your own numbers — your electricity rate, your garage, your winter.
4. Read owner reviews for failure patterns, not star averages. What breaks, when, and under what conditions. Those are described as owner-reported and are never quantified as a rating of ours.
5. Rank for the budget buyer. The cheapest thing that actually solves the problem wins, not the most expensive thing that solves it best. That is a deliberate editorial choice and it is the reason our top pick is often not the priciest option on the page.
6. Name what to skip. Every roundup carries a “skip this” verdict, and where the honest answer is “you probably do not need any of these”, we say that instead of ranking six things.

What we do not do, stated as plainly as what we do

• We have not tested this gear. We do not own it. There is no lab, no test garage and no fleet of sample units. Nothing on this site will ever say “in our testing”, “we found” or “after a month of use” about a product we have not handled, because that would be a lie and it is the easiest kind of lie to catch.
• We accept no free products and no sponsored placements. No manufacturer has paid for a position, and none has been offered one.
• We publish no star ratings or review counts of our own. The score on each product is an editorial judgment, it is visible on the page, and it never appears in the structured data — marking up an editorial score as a product rating would contradict this page.
• We do not invent specifications. Where a manufacturer does not publish a figure, our spec tables say “Not published by the manufacturer”. That happens more often than you would expect in this category, and the absence is itself information.
• We do not print prices from memory. Prices render only from a live data feed with a freshness limit. Where we hold no current verified price, the button reads “check price” rather than showing a number that might be wrong.

Why this is still useful

Because for the question this site answers — “which cheap one should I buy?” — a spec sheet, a manual and honest arithmetic get you further than a fortnight with a stopwatch would.

Whether a garage heater will warm your garage is not a matter of opinion. It is volume, temperature rise, and how well the space seals, and the answer is arithmetic. Whether a battery maintainer works in an unheated garage in January is not a matter of taste either; it is whether the manufacturer publishes an operating temperature range that covers it, and most of them do not.

And unlike a testing claim, you can check our work. Every figure links to where it was published. If we get one wrong, you will be able to tell, and we would like you to tell us.

The scoring

Each product carries an editorial score out of 10, broken into four to six criteria chosen for that category — paint safety and reach for a snow brush, cold rating and published data for a battery maintainer, heat output and installation burden for a garage heater.

Those scores are ours. They reflect how well a product suits the buyer this site is written for, which is someone weighing a $30 prevention against a $300 problem. A product can score well here and be a poor choice for someone with different priorities, and we try to say so in the “skip this one if” line that every product carries.

Sourcing standards

• Product specifications come from the manufacturer’s published pages, cited by name and linked.
• Prices come only from the live price layer, never from memory.
• Running-cost arithmetic shows the formula and states every input, with the electricity rate cited to the EIA’s published figure and dated.
• Safety and regulatory claims cite the manufacturer’s manual or the published rule, and we say plainly when a job needs a professional.
• Owner-reported failure patterns are described as exactly that, never as our own finding.

Every page ends with a Sources section listing what was consulted.

Update cadence

• Prices: refreshed automatically each day. A price older than 48 hours disappears rather than being shown.
• Roundups: reviewed in full each August and September, before the season, for product availability and pick changes.
• Calculators: reviewed annually, and whenever the cited electricity rate source publishes an update.
• Safety and regulatory guidance: reviewed annually and on any known rule change.

The visible “last updated” date on a page changes only when the content actually changed. A price refresh is not an edit and does not bump it — a date that moves every day is a date that means nothing.

Corrections

We make corrections in place, with a dated note on the page, never silently. If you find an error — a spec we read wrong, a sum that does not work, a product that has been discontinued — tell us and we will fix it and say that we did.

The state of the site right now

45 guides, roundups, comparisons and calculators, covering 38 products across six categories. Written by Scooter M., published by Slate Mill Group.

See also our editorial policy for how commercial relationships are kept away from the rankings, and the affiliate disclosure for how the site is funded.