Every baseboard and wall heater gets a score from 0 to 100% built from four factors, which maps onto the 5-point rating shown on the site (a 0% score would be 1.5 stars; a perfect score, 5). Each factor is scored against fixed reference points, not against the other products in the list, so adding a new model never moves another model’s rating. Heaters are grouped by type, convection baseboard, hydronic baseboard and wall heater, and use the same scale in every group.
| Factor | Measures | Weight |
|---|---|---|
| Value | price per kilowatt of rated output | 35% |
| Controls | thermostat in the box, electronic thermostat, selectable wattage, remote or timer | 25% |
| Safety | overheat cutout, manual reset or full-length sensing, backup thermal fuse | 15% |
| Warranty | warranty on the complete heater and on the element | 25% |
Where the numbers come from
Output, voltage, thermostat, overheat protection, element and warranty come from the maker’s spec sheet, manual or product page, or the maker’s own copy on a retail listing. When the maker’s figures conflict, the spec sheet wins and the conflict is noted on the product page. Prices are checked at the stores each page links to, and the lowest is used.
The factors
Value is the current price divided by the rated output at the highest rated voltage, in dollars per kilowatt, on a log scale, so halving the price always counts the same. $400 per kW scores zero and $60 per kW full marks. Every electric resistance heater turns all its power into heat, so price per kilowatt is a fair measure of what each one costs for the heat it gives. The price is the heater alone; a wall thermostat or built-in kit sold separately isn’t added.
Controls is 50% for a thermostat in the box, 20% more if that thermostat is electronic, or 20% for a baseboard that takes an optional built-in thermostat kit; plus 15% for wattage or voltage the installer can choose and 15% for a remote or timer. A heater that needs a separate wall thermostat and offers neither of the others scores zero.
Safety is 50% for a published overheat cutout, 25% more if that cutout needs a manual reset or senses the full length of a baseboard, and 25% more for a one-time thermal fuse that backs it up.
Warranty combines the warranty on the complete heater (60%) and on the heating element (40%). For the heater, 1 year scores zero and 5 years full marks; for the element, 1 year scores zero and 10 years or lifetime full marks. When only one term is published, it counts for both.
What isn’t scored
Watts per foot, output on 208 V, the lowest wattage setting, length, weight, the maker’s heating-area claim, the element type, fan delay and release date are listed but not scored. Heating area claims are left out because each maker assumes a different climate and ceiling height.
Missing data
If a heater’s controls or overheat protection aren’t published, that factor gets the neutral middle score (50) and the product page marks it as estimated. The exception is warranty: a maker that doesn’t publish one gets no warranty counted, so that factor scores zero and is marked estimated.
Ties and discontinued models
Products are ranked by score within each group. Discontinued models stay listed but rank below every current model and can be hidden with the “Hide discontinued” filter.