The Five-Step Review Process
Every Heaters Tested review follows the same five-step process. We document this publicly so you can see exactly how our rankings are produced — and so we hold ourselves accountable.
Category Selection
We choose heater categories based on what homeowners and renters actually search for and ask about. We don't write reviews for categories where we can't get real, lived-in experience, and we don't accept brand-suggested topics. If we haven't personally used it in a real home, we don't publish a verdict.
Shortlisting
We identify the top 8–15 candidate heaters in each category using:
- Verified buyer reviews from major retailers (minimum 100 reviews per product)
- Owner feedback and real-world complaints gathered from forums and reader mail
- Manufacturer specifications and safety certifications (reviewed as the maker's own claims)
- Input from our reviewers, who follow the heater market closely year-round
From this list, we narrow down to the final 5–7 heaters that will be used day to day in our homes.
Hands-On Home Use
We purchase or receive review samples of every heater (always disclosed). Our reviewers plug each one into real rooms — drafty bedrooms, home offices, garages, patios — and live with it for at least two full weeks, often longer. That means overnight runs, cold snaps, kids and pets around, and the kind of daily use that tells you things a quick look never would.
We read every owner review we can find and compare notes with each other before settling on a verdict. No heater gets a recommendation based on a single afternoon with it.
Note-Comparing & Scoring
After living with each heater, our reviewers compare impressions honestly — where they agreed, where they differed, and why. We score every product against the same criteria using a consistent rubric (see below). Scores are settled before rankings are assembled. We don't pick a "winner" first and work backwards.
Editorial Review & Publication
Every review is read over by our senior reviewer before it goes live. We check that claims match what we actually experienced, that safety notes are accurate, and that the tone is honest rather than just positive. Reviews are then revisited regularly — or sooner if something meaningful changes about the product.
Our Scoring Criteria
Each heater receives an overall score out of 10, built from weighted sub-scores. Weights shift slightly by category — for example, "overnight quiet" matters more for an oil-filled radiator in a bedroom than for a garage heater.
| Criterion | What We Look At | Weight |
|---|---|---|
| Heating Performance | Does it actually warm the room it's meant for, and how quickly does it take the chill off? | 30% |
| Safety & Build Quality | Tip-over and overheat protection, surface temperatures, how solid it feels after weeks of daily use | 25% |
| Ease of Living With | Controls, noise at night, portability, how much it intrudes on daily life | 20% |
| Running Cost & Efficiency | Wattage draw relative to warmth delivered, thermostat accuracy, timer usefulness | 15% |
| Value for Money | Purchase price relative to how well it performs and how long it holds up | 10% |
Why This Matters
Most "best heater" lists you find online are ranked by affiliate commission rates. Brands that pay higher commissions get listed first. We refuse to do that. Heaters Tested's rankings are determined exclusively by our scoring rubric, applied identically to every heater — paid or unpaid, well-known brand or underdog.
What We Don't Do
To keep our reviews trustworthy, there are several things we explicitly don't do:
- We don't accept payment for placement. No brand can pay to be ranked higher.
- We don't write reviews based on press releases. Every review requires real home use over days and weeks.
- We don't hide negative findings. If a heater disappoints, we say so — even if it's from a brand we've praised before.
- We don't rely on a single data source. Every score combines our own lived experience, careful reading of owner reviews, and the manufacturer's published specs.
- We don't present manufacturers' ratings as our own. When we mention CADR figures, wattage or safety certifications, those are the maker's claims — not something we've independently verified with equipment.
How We Update Reviews
Heaters change. Models get discontinued, new versions appear, prices shift, and occasionally a safety issue surfaces after a product has been on the market a while. We revisit every published review on a regular basis, and immediately when:
- A product is recalled or flagged by a safety regulator
- A model is significantly updated or replaced by the manufacturer
- Widespread new owner reports change the picture on reliability or safety
- Pricing shifts enough to affect the value verdict
Updated reviews always show the most recent revision date at the top of the article.
Questions About Our Process?
We're committed to transparency. If you have questions about how a specific review was conducted or want to challenge a finding, email hello@heaterstested.com or visit our contact page. We respond to every methodology question within 2 business days.