The H1 HT is an FDM 3D printing filament dryer developed by ELEGOO. It reduces moisture in filament through heating and circulating airflow, helping improve issues caused by moisture absorption, such as stringing, bubbles, and unstable extrusion.
Key features include:
The H1 HT has a maximum drying temperature of 85°C, which meets the drying requirements of common consumer filaments and some engineering filaments.
The device provides 11 built-in filament presets:
PLA, PETG, TPU, ABS, ASA, PET, PP, PC, PA, PAHT-CF, and PVA.
For filaments that are not included in the presets, use Custom Mode and refer to the drying parameters recommended by the filament manufacturer.
The H1 HT supports:
It is compatible with common 1 kg standard spools.
2.85 mm and 3.0 mm filament are not supported.
No.
The internal space and rolling mechanism of the H1 HT are designed for standard spools with a width of 50–68 mm and a diameter of ≤200 mm.
2 kg / 3 kg large spools and loose filament without a spool may not fit properly or rotate correctly. Do not use them.
No.
The H1 HT is an independent filament drying device. It can complete the drying process after being connected to a power source and does not depend on a printer.
After drying, the filament can be removed and installed on a printer. Alternatively, the filament can be guided to a printer or other feeding system through the filament outlet and PTFE tube.
Rated power:
Under the reference test conditions of an ambient temperature of 25°C, 220 V input, and continuous operation at 85°C for 8 hours, the power consumption is approximately 0.386 kWh.
Under laboratory test conditions, the maximum operating noise level is approximately 36 dB, with an ambient noise level of approximately 27 dB.
The standard package includes:
After unboxing, check that all accessories are included. Keep the original packaging for future transportation or storage.
Place the device on a stable and level indoor surface. Observe the following precautions:
When drying is complete, the screen displays a completion notification and the device emits a buzzer alert.
Place the spool securely on the two support rollers inside the chamber.
After installation, gently rotate the spool to make sure that:
If you need to feed filament directly from the dryer to a printer, also make sure that the filament is oriented correctly toward the outlet.
Follow these steps:
It is recommended to install the PTFE tube before inserting the filament to make filament feeding easier.
The rear of the device has two filament outlets.
Upper filament outlet
Recommended for:
The upper outlet provides a path with less bending.
Lower filament outlet
Recommended for:
If excessive feeding resistance occurs, check the spool orientation, PTFE tube bending, and whether the filament is stuck.
Silica gel desiccant is recommended. Place it in the designated desiccant compartment inside the chamber.
Do not use water-soluble salt-based desiccants such as calcium chloride. They may produce liquid after absorbing moisture, which could contaminate or damage the device.
If color-changing silica gel is used, check the color indicator to determine whether the desiccant needs to be replaced or regenerated.
| Filament | Temperature | Duration |
|---|---|---|
| PLA | 55°C | 8 h |
| PETG | 65°C | 8 h |
| TPU | 70°C | 8 h |
| ABS | 70°C | 8 h |
| ASA | 80°C | 8 h |
| PET | 80°C | 8 h |
| PP | 80°C | 8 h |
| PC | 80°C | 8 h |
| PA | 80°C | 8 h |
| PAHT-CF | 80°C | 8 h |
| PVA | 80°C | 8 h |
After selecting the corresponding filament type, the device automatically applies the preset parameters.
Custom Mode supports:
Different filament brands and formulations may have different temperature tolerances.
If the filament manufacturer provides specific drying parameters, follow the manufacturer's recommendations whenever possible. Avoid excessive temperatures, which may cause the filament to soften, stick together, or deform the spool.
They may.
Even for the same filament type, such as PLA, PETG, or PA, different brands and formulations may have different temperature tolerances and moisture absorption characteristics.
The recommended priority for selecting drying parameters is:
When spool rotation drying is enabled, the device automatically rotates the spool during the drying process. This allows different sections of the spool to continuously pass through the heated airflow area, helping improve uniform heating throughout the spool.
Spool rotation drying is generally recommended.
Before enabling this function, make sure that:
If the H1 HT is continuously feeding filament to a printer through the filament outlet, disable spool rotation drying.
The main interface displays the chamber temperature and relative humidity.
Temperature indicators:
Humidity indicators:
During drying, the chamber humidity will generally decrease gradually.
Note that chamber humidity is only a reference for the drying status. Whether the filament has reached the desired dryness also depends on the filament type, initial moisture content, and drying duration.
Consider the following factors together:
If the filament is severely moisture-affected, the drying duration can be extended appropriately, provided that the temperature and total drying time remain within the allowable range of the material.
Yes, but frequent opening is not recommended.
When Lid Detection is enabled, opening the lid pauses heating. Closing the lid resumes operation.
Frequent lid opening causes heat and dry air to escape, which may increase the actual drying time.
Yes, for short-term storage.
After drying is complete, the air valves automatically close. Together with the desiccant inside the chamber, this can help reduce the rate at which the filament absorbs moisture again in the short term.
For long-term storage, place the filament in a moisture-resistant bag, vacuum bag, or other sealed container with desiccant.
For highly hygroscopic engineering filaments such as PA-CF and PAHT-CF:
The standard recommended workflow for the H1 HT is dry first, then print.
If you need to feed filament directly from the H1 HT to a printer, use the filament outlet and PTFE tube.
When using this method:
If abnormal feeding or print failures occur, return to the standard dry first, then print workflow.
No.
The H1 HT does not support viewing drying history. When starting a new drying task, select a filament preset or configure the Custom Mode settings again.
Common symptoms include:
If several of these symptoms occur at the same time, dry the filament before performing another print test.
It can.
When moisture contained in the filament reaches the high-temperature nozzle, it rapidly vaporizes and can interfere with normal extrusion, resulting in stringing, bubbles, and reduced surface quality.
If stringing is caused by moisture-affected filament, adjusting retraction parameters alone usually cannot resolve the root cause. Dry the filament thoroughly first.
It can.
Moisture-affected filament may cause:
If the issue remains after thoroughly drying the filament, continue checking the printing temperature, nozzle condition, feeding resistance, and other print parameters.
Not necessarily.
Drying removes some of the absorbed moisture from the filament, so many printing issues caused by moisture can be significantly improved.
However, if the material has undergone performance degradation due to prolonged or severe moisture exposure, drying may not fully restore its original properties.
For functional parts or engineering applications that require high mechanical strength, use filament with a known storage history that has been adequately dried.
Not necessarily.
If the vacuum packaging is intact and there are no obvious signs of moisture exposure after opening, the filament can normally be used directly.
Drying is recommended in the following situations:
The recommended method is:
Sealed container + desiccant
Common storage methods include:
For moisture-sensitive materials such as PA and PVA, minimize the amount of time they are exposed to ambient air.
Not recommended.
The H1 HT can be used for short-term storage after drying when combined with desiccant. However, filament that will not be used for an extended period should still be stored in a vacuum-sealed bag or another suitable airtight container.
The primary function of the H1 HT is active heating and drying of moisture-affected filament.
If color-changing silica gel desiccant is used, check its color indicator to determine its moisture absorption status.
When the desiccant reaches saturation, regenerate or replace it according to the instructions provided by the desiccant manufacturer.
Do not place water-soluble salt-based desiccants that have produced liquid inside the H1 HT.
It is recommended to print as soon as possible after drying.
The rate at which filament absorbs moisture again depends on:
Moisture-sensitive materials such as PA and PVA should follow the principle of “print as soon as possible after drying and reseal immediately after use.”
Filament that is not being used should be returned to a sealed, moisture-controlled environment.
The basic connection is:
H1 HT filament outlet → PTFE tube → Printer filament inlet
Follow these steps:
The actual connection method depends on the feeding structure of the printer.
If the multi-color system supports external filament feeding through a PTFE tube, you can try connecting the H1 HT filament outlet to the corresponding filament inlet.
When connecting:
Actual compatibility depends on the feeding structure of the multi-color system.
The connection can be arranged as follows:
H1 HT → PTFE tube → Filament runout sensor → Printer feeding system
If there is a long exposed section of filament before or after the filament runout sensor, the filament may absorb moisture more quickly in a humid environment.
Where possible, minimize the exposed section or use a PTFE tube to guide the filament.
If the printer uses a traditional filament runout sensor → print head feeding structure, the H1 HT can be used as an external filament spool.
A typical connection is:
H1 HT → PTFE tube → Filament runout sensor → Print head
After connecting, perform a manual feeding test to make sure that:
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