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Vaporizer Comparison

G Pen Roam vs Tempest 2

Side-by-side specs, pricing context, and clear decision guidance.

G Pen Roam

G Pen Roam

Grenco Science $200

VS
Tempest 2

Tempest 2

Mad Heaters $179

Editorial Summary

G Pen Roam and Tempest 2 are both portable vaporizers, but they target different priorities. Tempest 2 is usually the lower-cost pick at $179, around $21 below G Pen Roam. G Pen Roam has the quicker listed heat-up profile, which can matter for shorter sessions.

Specs Compared

24

Different Specs

22

Shared Specs

2

Overall Overlap

8%

Shared Traits

Portable

Head-to-Head Highlights

A quick snapshot of the specs people usually care about first.

Price (USD)

Tempest 2 edge

G Pen Roam

$200

Tempest 2

$179

Tempest 2 is typically around $21 lower.

Heat-Up Time

G Pen Roam edge

G Pen Roam

~5 seconds

Tempest 2

~30-45 seconds with torch

G Pen Roam has the quicker listed heat-up profile.

Weight

Tempest 2 edge

G Pen Roam

~317g

Tempest 2

46g

Tempest 2 is the lighter listed unit.

Heating Style

Close call

G Pen Roam

Conduction

Tempest 2

Convection-heavy with thermal ball matrix

Heating style differs, which can impact flavor and extraction behavior.

Key Differences at a Glance

Top specs where these two devices diverge.

10 differences

Price (USD)

G Pen Roam

$200

Tempest 2

$179

Heating Type

G Pen Roam

Conduction

Tempest 2

Convection-heavy with thermal ball matrix

Heat Up Time

G Pen Roam

~5 seconds

Tempest 2

~30-45 seconds with torch

Temperature Range

G Pen Roam

204°C - 427°C (400°F - 800°F)

Tempest 2

N/A

Battery Type

G Pen Roam

Internal

Tempest 2

None

Battery Capacity

G Pen Roam

1300mAh

Tempest 2

N/A

Battery Life

G Pen Roam

15-20 sessions

Tempest 2

N/A

Charging

G Pen Roam

Micro-USB

Tempest 2

N/A

Charge Time

G Pen Roam

~2 hours

Tempest 2

N/A

Dimensions

G Pen Roam

178x127x102mm

Tempest 2

122mm x 18.5mm

Choose G Pen Roam if...

  • You care about faster heat-up time for quicker sessions.
  • You prefer a conduction heating profile.
  • Your usage leans toward electronic and concentrates sessions.
View G Pen Roam Profile

Choose Tempest 2 if...

  • You want the lower listed entry price ($179 vs $200).
  • You want the lighter unit for carrying and travel.
  • You prefer a convection-heavy with thermal ball matrix heating profile.
  • Your usage leans toward analog and premium sessions.
View Tempest 2 Profile

Spec Comparison Table

Direct comparison of every spec from each device profile.

22 differ 2 shared
SpecificationG Pen RoamTempest 2
Price (USD) $200$179
Device Type PortablePortable
Heating Type ConductionConvection-heavy with thermal ball matrix
Heat Up Time ~5 seconds~30-45 seconds with torch
Temperature Range 204°C - 427°C (400°F - 800°F)N/A
Chamber Capacity 0.1g - 0.2g (adjustable)
Battery Type InternalNone
Battery Capacity 1300mAhN/A
Battery Life 15-20 sessionsN/A
Charging Micro-USBN/A
Charge Time ~2 hoursN/A
Dimensions 178x127x102mm122mm x 18.5mm
Weight ~317g46g
Power Adjustment Digital ControlVisual gauge with click indicators
Chamber Material QuartzTitanium
Concentrate Support Yes
Brand Grenco ScienceMad Heaters
Adjustable Airflow NoYes
Body Material Grade 5 titanium, aluminum heat shield, stainless steel
Country of Manufacture Made in China, Assembled in the UK
Display Type LED
Haptic Feedback Yes
Release Date 2020
Warranty 1 year1 year

Comparison FAQs

What is the biggest difference between the G Pen Roam and the Tempest 2?

The biggest practical difference is heating approach: G Pen Roam runs conduction while Tempest 2 runs convection-heavy with thermal ball matrix. That changes flavor delivery, vapor density, and how the device responds to slow versus fast draws.

Which is cheaper, the G Pen Roam or the Tempest 2?

Tempest 2 is the cheaper option at $179 compared with $200 for the G Pen Roam, about $21 less. Live retailer pricing can shift, so confirm before buying.

Which heats up faster, the G Pen Roam or the Tempest 2?

G Pen Roam reaches session-ready temperature in ~5 seconds, while the Tempest 2 takes ~30-45 seconds with torch. That's roughly 33 seconds quicker on the G Pen Roam, which is useful if you want shorter, on-demand sessions.

What's the difference in heating between the G Pen Roam and the Tempest 2?

G Pen Roam uses conduction heating, while the Tempest 2 uses convection-heavy with thermal ball matrix. Heating style influences flavor profile, vapor density, and how forgiving the device is to draw technique.

Which is lighter, the G Pen Roam or the Tempest 2?

Tempest 2 is the lighter unit at 46g, around 271g less than the G Pen Roam at ~317g. The lighter device is easier to carry and pocket day-to-day.

Can I set custom temperatures on the G Pen Roam or the Tempest 2?

G Pen Roam controls heat with digital control, while the Tempest 2 uses visual gauge with click indicators. G Pen Roam gives you finer per-degree control.

What battery life can I expect from the G Pen Roam and the Tempest 2?

G Pen Roam's spec sheet lists 15-20 sessions; the Tempest 2 lists N/A. The two manufacturers measure battery life differently here, so direct comparison isn't straightforward.

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