Overview
The Firewood 4 (commonly abbreviated as FW4) is a portable dry herb vaporizer designed and manufactured by Firewood Vapes, a small artisan operation known for its handcrafted wooden vaporizers. The FW4 represents the fourth generation of the Firewood line and was available by at least late 2016 based on community purchase reports.
The Firewood 4 is an on-demand convection vaporizer powered by a single user-replaceable 18650 battery. It features a distinctive capsule-based loading system, regulated temperature control across multiple settings, and a compact wooden body that made it a standout in the portable convection category. The device was widely recognized within the vaporizer community for its pocketability, discretion, and efficient extraction from small loads.
The FW4 was typically sold with a walnut body finished in tung oil with a wax buff, though other wood options may have been available across production runs.
Specifications
| Specification | Details |
| Heating Method | On-demand convection |
| Power Source | Single removable 18650 battery |
| Temperature Control | Multiple regulated temperature settings |
| Loading System | Pre-loadable capsules |
| Body Material | Walnut (with tung oil, wax buff finish) |
| Accessories Included | Cooling unit, glass mouthpiece stems, capsules, capsule caddy, cork caps |
| Original Retail Price | Approximately $160 USD (shipped with two batteries, as reported in late 2016) |
The capsule system allowed users to pre-load multiple capsules for use throughout the day. A capsule caddy was included for carrying loaded capsules, and cork caps were provided to seal loaded capsules and preserve freshness. A cooling unit, also crafted from matching walnut, was available to extend the vapor path and reduce vapor temperature.
Community Reception
The Firewood 4 was well-regarded within the vaporizer community, particularly among users who valued discretion, portability, and on-demand convection performance. One community member who owned a Tubo Evic, Milaana, and MistVape Touch alongside the FW4 stated that they preferred the FW4 when out of the house, noting that they could wear it in work trousers with the loaded capsule caddy in a shirt chest pocket without anyone noticing. This level of discretion was frequently cited as a key advantage.
Pros identified by the community:
- Exceptional portability and pocket-friendly form factor
- Discreet design — the wooden body did not look like a typical vaporizer
- Regulated temperature control provided consistency and ease of use compared to unregulated convection competitors
- Capsule loading system allowed for convenient pre-loading and quick swaps
- On-demand heating meant no wasted material between draws
- Efficient extraction from small amounts of herb
- Replaceable 18650 battery for extended use away from charging
- Handcrafted wooden aesthetic appealed to many users
Cons and concerns noted by the community:
- Availability could be limited due to the small-batch artisan production model
- Some users of earlier Firewood models (pre-FW4) reported not enjoying those versions, though the FW4 was generally seen as a significant improvement
- Like most on-demand convection portables, it required some technique and was better suited for solo use; passing it around with friends could require coaching newcomers on draw technique
The device maintained enough of a following that units were actively sought on the community's marketplace years after initial release, with one user specifically seeking an FW4 via PayPal as late as February 2021. Used units in excellent condition with full accessory kits were listed at approximately $170 USD as late as 2023, indicating sustained demand and value retention.
Tips & Techniques
The Firewood 4's capsule system was central to its workflow. Community members recommended the following practices:
- Pre-load capsules before heading out. The capsule caddy allowed users to carry multiple pre-loaded capsules, making reloading as simple as swapping a capsule — ideal for discreet, on-the-go use.
- Use cork caps on loaded capsules to preserve herb freshness and prevent spillage while carrying.
- Grind consistency matters. As a convection vaporizer, the FW4 benefited from a medium grind that allowed adequate airflow through the capsule without being so fine that material could pass through.
- On-demand draw technique: As an on-demand convection unit, the FW4 was designed for taking one or two quick rips within about a minute, rather than extended session-style draws. Users could take a hit or two, stop, and return to the same capsule later without significant material waste — a key advantage over session-style devices.
- A custom capsule loading tray (produced by Delta 3D Studios) was available as a third-party accessory and was recommended by some community members to simplify the process of filling multiple capsules at once.
Temperature Guide
The Firewood 4 featured multiple regulated temperature settings, giving users more precise control compared to unregulated convection competitors like the Milaana. While specific temperature values for each setting were not extensively detailed in the available community discussions, general convection vaporizer principles applied:
| Temperature Range | Effect Profile |
| Lower settings (~170–185°C / 338–365°F) | Best for flavor, lighter effects, terpenoid-rich vapor |
| Mid settings (~185–200°C / 365–392°F) | Balanced flavor and extraction, moderate clouds |
| Higher settings (~200–220°C / 392–428°F) | Maximum extraction, denser clouds, stronger effects |
The regulated nature of the FW4's temperature control was cited as a distinct advantage for users who wanted consistent results without the learning curve associated with unregulated devices.
Maintenance & Cleaning
As with most convection vaporizers utilizing a capsule and glass stem system, maintenance for the Firewood 4 focused on several key areas:
- Glass mouthpiece stems could be soaked in isopropyl alcohol to remove residue buildup. The FW4 typically came with two glass stems, allowing one to soak while the other remained in use.
- Capsules required periodic cleaning to maintain airflow and flavor. Residue from spent herb (ABV) could be brushed out, and capsules could be soaked in isopropyl alcohol for deeper cleaning.
- The cooling unit added vapor path length and would accumulate condensation and residue over time, requiring occasional disassembly and cleaning.
- The wooden body should be kept dry and cleaned only with a lightly dampened cloth — isopropyl alcohol should not be applied to the finished wood exterior.
Common Issues & Fixes
The available community discussion threads for the Firewood 4 did not extensively catalog recurring hardware failures or widespread defects. The device appeared to be generally reliable based on community sentiment. However, some general considerations emerged:
- Technique-dependent performance: New users transitioning from session-style or conduction vaporizers sometimes needed time to adapt to the on-demand convection draw technique. Taking slower, longer draws and allowing the heater to reach temperature before inhaling firmly were commonly suggested adjustments.
- Battery selection: As with all aporizers using 18650 cells, using high-quality, high-drain batteries from reputable manufacturers was recommended. Poor-quality or low-drain cells could result in underperformance.
- Earlier Firewood models vs. FW4: At least one community member noted not enjoying a previous Firewood model, suggesting the FW4 represented a meaningful improvement in the product line. Users with negative experiences from earlier generations were sometimes encouraged to give the FW4 a fresh evaluation.
Accessories & Modifications
The Firewood 4 had a modest but functional accessory ecosystem:
| Accessory | Description |
| Cooling Unit | Walnut wood extension piece that lengthened the vapor path for cooler draws. Finished to match the main body. |
| Glass Mouthpiece Stems | Standard glass stems for direct draw; two typically included. |
| Capsules & Capsule Caddy | Pre-loadable herb capsules with a carrying caddy. Cork caps provided for sealing loaded capsules. |
| Capsule Loading Tray | Third-party accessory custom-printed by Delta 3D Studios; simplified filling multiple capsules at once. |
| Extra 18650 Batteries | Carrying spare batteries extended the device's usability significantly for all-day use away from a charger. |
Community members did not extensively discuss water pipe adapter (WPA) compatibility in the available threads, though the community member who compared the FW4 to other on-demand portables noted that whether a user planned to use a device "dry or through water" was a consideration when choosing between competing models, suggesting water use was at least possible with some configuration.
Comparisons
The Firewood 4 was most commonly compared to other on-demand convection portables of its era, as well as to the dominant session-style portable of the time, the Storz & Bickel Mighty.
Firewood 4 vs. Milaana
This was one of the most frequently discussed comparisons in the community. Both devices used a single replaceable 18650 battery and offered on-demand convection heating. The key differentiator was in temperature control: the FW4 featured regulated temperature settings, while the Milaana was completely unregulated, meaning the user controlled temperature solely through draw speed and button hold time. This made the FW4 more accessible to newcomers, while the Milaana offered more raw power and user control for experienced users willing to master the technique. Both were well-regarded, and the choice often came down to personal preference regarding control style.
Firewood 4 vs. Mighty
The Mighty was a fundamentally different category of device — a session-style hybrid (conduction-dominant) portable designed to be turned on and enjoyed over several minutes until the load was cashed. The FW4, by contrast, was designed for quick one-or-two-hit extractions that could be spread over time. One community member summarized the Mighty as the device you "break out and enjoy for a few minutes until the load is cashed" or "pass around a few friends," while the FW4 and similar on-demand units were for "a quick rip or two within a minute." Both offered excellent vapor quality, but they served different use cases.
Firewood 4 vs. MistVape Touch / Tubo Evic
These were grouped together as on-demand convection competitors. One experienced community member who owned all of these units (FW4, Milaana, MistVape Touch, and Tubo Evic) stated that the FW4 was their preferred choice when out of the house due to its superior portability and discretion. However, the same user indicated that if discretion were not a factor and they could vape freely anywhere, they would choose the Tubo Evic with an unlimited supply of batteries — suggesting the Tubo may have offered superior vapor production or overall performance in unrestricted settings.
Firewood 4 vs. Arizer Air
At least one community member sought to acquire an FW4 specifically to compare it against their Arizer Air, suggesting these were seen as occupying a similar portable niche, though the Air is a session-style conduction/convection hybrid rather than an on-demand convection device.
Firewood 4 vs. VapCap M
For users primarily seeking a discreet, pocketable device for small amounts of herb, at least one community member suggested the VapCap M (a butane-heated device at approximately $50) as potentially the best fit — particularly for use cases involving keeping the device in a pocket or leaving it in a car. This was presented as a budget-friendly alternative rather than a direct performance competitor.