Longer Constant Temperature Enclosure: problems, parts and running costs

Checked: 2026-10-17

Summary

The Longer Constant Temperature Enclosure is a passive PVC-polyester cloth tent that traps the printer’s own heat; it has no heater, fan, temperature sensor, LED or filtration, so its “constant temperature” claim is unquantified. The most concrete owner complaint is a filament inlet with no matching opening, which forces the printer to be rotated to load filament, and category data suggests a passive tent may not reach the 50–65 °C that ABS often needs in a cold room. It adds no recurring cost, and at the Longer sale price of $79.99 the size-to-price ratio is hard to beat.

Common problems and fixes

No active heating, fan or temperature sensor — “constant temperature” means passive heat retention only; category testing of other cloth tents puts chamber air around 35–50 °C, and many budget tents lack built-in sensing, so buyers printing ABS should add their own thermometer and verify the chamber before committing. [1][6][7]
Filament spool access — one owner of this exact enclosure reports the filament inlet sits on a side with no matching opening, forcing them to rotate the printer to load filament; Longer has not documented a spool-access cutout. This is a single report, not a measured failure rate. [1]
May not reach ABS temperatures — users report needing roughly 50–65 °C chamber air for ABS, and general guidance puts a good ABS enclosure near 60 °C while warning that 65 °C stresses printed parts and electronics; a passive tent in a cold room may not get there. [4][5]
Flame-retardancy claim is uncertified — Longer states “double-sided flame retardancy” but names no test standard, report or certificate. [1]
Warranty does not itemize the enclosure — the site-wide banner says 12 months, but the policy table lists 12 months for major parts of printers and excludes accessories from the extended warranty, so the enclosure’s covered period is unclear. [1][2]

Parts and consumables

No replaceable parts or consumables reported. The enclosure is passive: no heater, fan, sensor, filter, LED or electricity, and no replacement cover or frame parts are sold.

Yearly running cost

Nothing recurring.

When it is a good buy

Longer lists the enclosure at $79.99 on sale against $109.99 regular in October 2026, and Newegg lists it at $99.99 (a listing dated June 2024, so that figure may be stale). At $80 or less the size-to-price ratio is hard to beat for a Longer or similar mid-size FDM printer; $81–100 is still fair for the volume, but compare tents at that price that add LED lighting or ventilation; $101–110 is weak-to-fair; above $110 it is generally weak value unless the Longer brand or the specific large size is required. Named alternatives: the VEVOR cloth tent adds LED lighting, and the SUNLU tent is the competing constant-temperature option. [1][3][8][9]