Every dog grooming dryer gets a score from 0 to 100% built from seven 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. Dryers are grouped as single-motor force dryers, twin-motor force dryers and stand dryers, and all three groups use the same scale.
| Factor | Measures | Weight |
|---|---|---|
| Airflow | published airflow volume in CFM | 25% |
| Motor power | rated input watts, or rated amps at 120 V | 15% |
| Air speed | published top air speed | 10% |
| Value | price per CFM of published airflow | 10% |
| Features | speed control, heater settings, reach, nozzles and a stand, wall mount or outlet | 20% |
| Noise | highest stated noise level | 5% |
| Warranty | warranty length, with a longer motor warranty counted at half | 15% |
Where the numbers come from
Airflow, power, air speed, settings, hose length, weight and warranty come from the maker’s spec page or product copy, including the maker’s own copy on a retail listing. When a figure for one model appears only on the listing for a kit built around it, such as a dryer sold with and without a stand, that figure is used for both and the source is named on the product page. Figures that conflict between the maker’s own sources are left out rather than guessed. Prices are checked at Amazon and the maker’s own store, and the lowest price at a store the page links to is used.
The factors
Airflow is the published volume of air in cubic feet per minute (CFM), on a log scale: 60 CFM scores zero and 300 CFM full marks. It is the factor that most decides how fast a coat dries.
Motor power is the rated input power, on a log scale: 400 W scores zero and 1,800 W full marks. When a maker publishes only the current draw, it is converted at 120 V (10 A counts as 1,200 W). A wattage above 2,400 W on a 120 V plug is more than a 20 A household circuit supplies, so it can’t be a continuous input rating. Such a claim isn’t scored, and the current draw is used if published. Peak horsepower is shown on product pages but never scored, because makers measure it in different ways.
Air speed is the published top air speed, on a log scale: 120 mph scores zero and 700 mph full marks. Figures in feet per minute or metres per second are converted to mph.
Value is the current price divided by the published airflow, in dollars per CFM, on a log scale: $4 per CFM scores zero and $0.60 per CFM full marks.
Features is 30% for a stepless speed dial (15% for two or more fixed speeds), 25% for a temperature dial or two or more heat settings (15% for a heater with one setting), 20% for reach (a hose of 8 ft or more, or a hands-free arm), 10% for three or more nozzles, and 15% for a stand, wall mount or built-in clipper outlet. A dryer whose air is only warmed by its motor counts as having no heater.
Noise is the highest noise level the maker states: 85 dB scores zero and 60 dB full marks. Few makers publish it.
Warranty is the maker’s warranty on the whole dryer: no warranty scores zero and 5 years full marks. When the motor carries a longer warranty than the rest of the dryer, the score uses the average of the two (a 2-year motor warranty with 90 days on other parts counts as a little over 1 year).
What isn’t scored
Peak horsepower, weight, cord length, top air temperature, motor count and release date are listed but not scored. A twin-motor dryer is not scored higher for its second motor; it earns its score through its published airflow and power.
Missing data
Airflow is the figure that most separates these dryers, and many listings leave it out. A dryer that doesn’t publish its airflow scores zero for airflow, marked as estimated, so a thin listing can’t rank above a documented one. Motor power works the same way: with no rated watts or amps, or only a wattage claim a household outlet can’t supply, power scores zero and is marked estimated. Value can’t be worked out without airflow, so it gets the neutral middle score (50), as do air speed and noise when they aren’t published. Features score neutral only when none of them is published; a feature the maker doesn’t mention otherwise counts as absent. A maker that doesn’t publish a warranty 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.