Model reference
Finnex HMU-400S 400 W Digital Titanium Aquarium Heater
Model: Finnex HMU-400S Digital Titanium Aquarium Heater, 400 W
The official grouped HMU Shop record identifies this exact selection as 400 Watts, SKU HMU-400S, with a distinct Shopify variant ID. The comparison chart covers the 100–500 W HMU range. These sources do not establish a suitable aquarium volume, complete electrical rating, water-type approval or installation setup for the exact configuration.
This model lookup is separate from the questionnaire shortlist. It does not certify that this model meets your selected requirements.
Exact-model photograph is not verified. The standard review uses an official HMU-series visual only, captioned as family appearance without claiming the selected wattage or package. This reference lookup remains text-only; no exact 400 W image is verified.
Finnex’s U.S. Shop identifies a 400 W HMU option as SKU HMU-400S, while the family chart gives a 68–92°F control range but no aquarium-capacity band. This is a source-based model reference, not a gallon recommendation or a confirmed marketplace listing.
Search this model on Amazon ↗Search results may include other models. Confirm the exact model, applicable region, condition and included parts before ordering.
As an Amazon Associate I earn from qualifying purchases.
Read the detailed model assessment · Find products for my needs
Documented model details
- The Finnex Shop product JSON lists the 400 Watts option as SKU HMU-400S and Shopify variant 49216070123819; its barcode field is null.
- The grouped HMU description advertises a titanium heating tube, remote temperature sensor, digital controller/display, protective guard and non-resumable fuse. These are manufacturer family-page claims, not independent test results.
- Finnex’s comparison chart includes 400 W within its 100–500 W HMU span and lists a titanium tube, steel coil, push control, digital display and a 68–92°F range. It does not provide this model a tank-capacity band or exact dimensions.
- The visible Finnex instructions index lists HMH, HMS and HPC heater manuals but no HMU manual; instructions from those other families are not transferred to HMU-400S.
Limits to weigh
- No model-specific aquarium-capacity range is documented in the reviewed primary sources. Do not infer a gallon fit from 400 W alone.
- The reviewed HMU sources do not establish a complete voltage/frequency/current rating, approved water types, required placement or immersion depth, exact model dimensions, or HMU-specific installation instructions.
- The 68–92°F range is a manufacturer family-chart statement; the sources do not establish a selector increment, accuracy tolerance or independently measured water temperature.
- The official HMU gallery image is a family visual, not a wattage-labelled 400 W assembly or package. This reference entry is text-only.
- No exact marketplace listing or package identity is verified. The buying route is an exact Finnex HMU-400S search, not a confirmed child listing and not a substitute sibling model.
Check before ordering
- Check the offered item and carton for Finnex HMU-400S / 400 W; do not substitute HMU-300S or HMU-500S.
- Confirm the actual unit’s full electrical nameplate and obtain HMU-specific instructions before planning installation or connection; the comparison chart is not a complete supply rating or manual.
- Do not treat the 400 W rating as proof of a suitable aquarium size. Require model-specific capacity and setup guidance for the actual tank and room conditions.
- Check the offered package contents and model marking; the grouped family image does not identify a selected 400 W assembly.