The short answer
Buy a dry herb vaporizer first if you want the full set of compounds in flower and a low cost per session. Buy a vape pen first if you want a device that fits in a pocket, needs no grinding, and leaves less odor.
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Both send THC to the lungs. Effects start in 1 to 10 minutes and peak near 30 minutes. The difference sits in the material and the hardware.
Cost per session
Flower in US legal markets runs $8 to $15 per gram for mid-shelf. A dry herb session uses 0.1 to 0.3 grams. That is $0.80 to $4.50 per session.
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A 1-gram distillate cartridge runs $25 to $60 and yields 250 to 400 puffs. Each puff delivers 2 to 4 mg THC. Heavy users spend less per milligram on carts. Light users spend more.
Hardware: dry herb devices cost $80 to $350. A 510 battery costs $15 to $40. Cartridges are disposable and cost $25 to $70 each.
Heat and compounds
Dry herb devices heat flower to 315 to 430 F. THC boils near 315 F. CBD boils near 356 F. Terpenes boil between 250 and 400 F. A session at low heat gives more flavor and less vapor. A session at high heat gives more vapor and a toasted taste.
Carts run 200 to 400 F, set by the battery voltage. High voltage burns the oil and gives a harsher hit. Distillate carts hold THC isolate plus added terpenes. Live resin and rosin carts keep more of the plant terpenes. Dry herb keeps everything the flower holds.
Contaminants
The CDC linked vitamin E acetate in THC cartridges to the 2019 EVALI outbreak. Carts sold in US legal shops are tested for vitamin E acetate, pesticides, and residual solvents. Carts from unlicensed sellers are not.
Dry herb vapor at 315 to 430 F makes fewer combustion byproducts than a joint or a pipe. Combustion runs above 1,600 F and makes tar and carbon monoxide.
Portability and odor
A pen is the size of a pen. No prep. One hand. Low odor. A dry herb device needs grinding, packing, and cleaning every 5 to 20 sessions. Vapor smells like toasted herb and clears in 15 to 30 minutes with airflow. Cart vapor smells less and clears faster.
Pick one first
- Pick a dry herb vaporizer first if you already buy flower, you want full-spectrum effects, and you vape at home.
- Pick a vape pen first if you need low profile use, you dose on the move, and you want zero session prep.
Options
Dry herb devices
- Portable battery unit: $100 to $250. Heat time 20 to 60 seconds. Chamber holds 0.1 to 0.3 grams. Needs a clean every 10 to 20 sessions.
- Butane torch unit: $60 to $120. Heat time 5 to 20 seconds. No battery. Needs a torch and butane.
- Desktop unit: $150 to $400. Plug-in power. Large chamber. Not for travel.
Vape pens
- Disposable: $20 to $50. No charging. No refill. Unit is trash when empty.
- 510 battery plus cart: $15 to $40 for the battery, $25 to $60 per cart. Reusable battery. Swap carts in seconds.
- Live resin or rosin cart: $40 to $70 per gram. More terpenes than distillate. Stronger smell than distillate.
What both need
Adults 21 and over in US legal states. Store both at room temperature away from light. Charge batteries on a hard surface away from fabric. Clean mouthpieces with isopropyl alcohol. Check the label for test results before you buy.