Thermacell
Thermacell Radius Zone Rechargeable Mosquito Repeller
Spatial Device · EPA-registered spatial repellent device
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Pros
- A rechargeable 15 ft zone that cuts bites 70 to 97% while you are in it, with no lotion, smoke, or scent to deal with.
- Sealed liquid cartridges and a battery make it the tidiest Thermacell to run, no mats or fuel to fuss with.
Cons
- A smaller bubble than Thermacell's 20 ft repellers, for about the same price.
- Wind or open space still thins it, and the vapor is highly toxic to fish.
The full review
Rechargeable metofluthrin emanator that builds a roughly 15-by-15-foot protection zone (about 110 square feet) with no open flame or fuel canister. A lithium-ion battery powers the heated cartridge, making it a tidy option for patios and decks. Like all vapor repellers it performs best in still, sheltered air and covers less ground in wind.
Scorecard
Expand any pillar to see exactly why it scored what it did.
Effectiveness45%81This is an area device, not applied to skin: published field trials report roughly 70–97% fewer mosquito landings or bites, over about a 15 ft zone. Scored 60% on that reduction and 40% on how much space it protects, so a larger zone counts for real. Reduction figures come from controlled or semi-field trials, not backyard conditions. Real-world protection drops sharply in wind and open air, so this is scored with lower confidence.
This is an area device, not applied to skin: published field trials report roughly 70–97% fewer mosquito landings or bites, over about a 15 ft zone. Scored 60% on that reduction and 40% on how much space it protects, so a larger zone counts for real. Reduction figures come from controlled or semi-field trials, not backyard conditions. Real-world protection drops sharply in wind and open air, so this is scored with lower confidence.
Evidence & honest claims25%81Metofluthrin is backed by definitive published evidence, weighted by how close its concentration is to the studied effective dose (base 72). Of 3 marketing claims audited: 2 strong, 1 moderate, 0 weak, 0 unsupported (+9).
Metofluthrin is backed by definitive published evidence, weighted by how close its concentration is to the studied effective dose (base 72). Of 3 marketing claims audited: 2 strong, 1 moderate, 0 weak, 0 unsupported (+9).
Safety15%60This is an area device, not applied to skin, so dermal risk does not apply. Scored on moderate inhalation risk from the vapor (−18); high toxicity to fish and aquatic life (−22). Use it outdoors in the open air only. Keep it well away from ponds, aquariums, and water features.
This is an area device, not applied to skin, so dermal risk does not apply. Scored on moderate inhalation risk from the vapor (−18); high toxicity to fish and aquatic life (−22). Use it outdoors in the open air only. Keep it well away from ponds, aquariums, and water features.
Transparency15%85This product names its active ingredient (+30); discloses the strength of every active (+35); publishes a concrete coverage figure (+20).
This product names its active ingredient (+30); discloses the strength of every active (+35); publishes a concrete coverage figure (+20).
Every pillar is scored from published rules. Read how we score.
Coverage & effectiveness
This is an area device: it protects a zone around it rather than your skin. Effectiveness is the published reduction in mosquito landings or bites. Real-world protection is best in still air and drops in wind or open space.
Mosquitoes
EstimatedModerate- Protected zone
- ~15 ft zone
- Fewer bites
- 70–97%
Metofluthrin emanators cut mosquito landings by roughly 91 to 97 percent in controlled still-air trials. The manufacturer states a 15-by-15-foot zone of about 110 square feet; real coverage is smaller in wind or open air.
Ingredient disclosure
This product names its active ingredient (+30); discloses the strength of every active (+35); publishes a concrete coverage figure (+20).
Only active ingredients are disclosed. The full ingredient list (inerts/carriers) is not published, so this may not be the complete formula.
- MetofluthrinActive
Active repellent · 5.5%
Claims audit
What the marketing says, versus what the evidence supports.
“15-by-15-foot protection zone, up to about 110 square feet”
EfficacyModerateCoverage per manufacturer under favorable, still-air conditions; wind reduces it.
“Rechargeable with no open flame or fuel”
OtherStrongBattery-powered heated cartridge; genuine convenience feature versus fuel models.
“DEET-free protection”
Deet FreeStrongActive is metofluthrin, not DEET.
Safe around dogs & cats?
Worst case from this product’s active ingredients. Do not apply this or any human repellent to your pet.
Mainly from Metofluthrin.
Not veterinary advice. Full guide to repellents around pets →