DREO HM311S vs HM713S: Which Mist Mode and Size Fits Your Space?
Choose the HM311S if cool mist is enough and its shorter, shallower shape suits your surface. Choose the HM713S if you specifically want the warm-mist option and a 6 L tank; it is taller and deeper, while the HM311S is wider. These are published specifications, not a runtime or room-performance test.
Published by Pickoryx · Published 2026-10-17
Source checked 2026-10-17 20:58 UTC
Products compared
Product A · ASIN B0CCVX6FSD
DREO HM311S 4L Smart Cool-Mist Humidifier
Last observed offer
$42.25 List Price: $49.99
Per listed package.
Checked 2026-10-19 13:02 UTC. Price and availability may change.
Product B · ASIN B0CB4CK3ZS
DREO HM713S 6L Smart Warm & Cool-Mist Humidifier
Last observed offer
$79.92 List Price: $89.99
Per listed package.
Checked 2026-10-19 18:50 UTC. Price and availability may change.
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The buying question
Is the HM713S's listed warm-mist option and larger tank worth choosing over the HM311S, and which shape fits the intended surface?
HM713S adds a warm-mist option and 2 L of listed tank capacity, while its listed body is taller and deeper; HM311S is shorter and shallower but wider.
Quick verdict
Choose DREO HM311S 4L Smart Cool-Mist Humidifier if
- You want a cool-mist model and prefer the HM311S's listed 10.16 in height and 5.51 in depth.
- A 4 L reservoir fits your refill plan and the 11.02 in listed width fits your surface.
Choose DREO HM713S 6L Smart Warm & Cool-Mist Humidifier if
- You specifically want the HM713S's listed warm-and-cool mist choice.
- You prefer a 6 L reservoir and can accommodate its 13.93 in height and 11.41 in depth.
When the recommendation changes
- A strict width limit may favor HM713S's narrower listed width; a strict height or depth limit may favor HM311S.
- Frequent warm-mist use can change water consumption, so tank volume alone cannot predict refill intervals.
The differences that matter
Mist Mode Choice
What this changes: If warm mist is a requirement, HM713S is the supported fit in DREO's reviewed product materials. This feature difference does not establish a health, safety, or comfort benefit.[1, 2, 3]
Tank And Placement Fit
DREO HM311S 4L Smart Cool-Mist Humidifier
4 L tank; listed dimensions 5.51 in D × 11.02 in W × 10.16 in H.[1]
DREO HM713S 6L Smart Warm & Cool-Mist Humidifier
6 L tank; listed dimensions 11.41 in D × 6.14 in W × 13.93 in H; DREO says warm-mist use consumes water faster.[2]
What this changes: HM713S's listed reservoir is 2 L (50%) larger, but it is also 3.77 in taller and 5.90 in deeper; HM311S is 4.88 in wider. Measure the available surface in all directions. Actual refill intervals depend on settings and room conditions, and warm-mist use may consume water faster.[1, 2]
Best for your routine
Cool mist is enough and the shorter, shallower listed shape fits better.
Best fit: DREO HM311S 4L Smart Cool-Mist Humidifier
Based on listed features, not comparative testing.
HM311S is presented as a cool-mist model and is listed at 10.16 in high and 5.51 in deep, but it is wider than HM713S.
A warm-mist option or a larger listed water reservoir is a priority.
Best fit: DREO HM713S 6L Smart Warm & Cool-Mist Humidifier
Based on listed features, not comparative testing.
DREO lists warm and cool mist plus a 6 L tank for HM713S; its greater height and depth still need to fit the chosen surface.
Value and trade-offs
The offers shown are per listed package; check the quantities and current terms on Amazon before comparing totals.
If HM713S costs more when you shop, weigh its warm-mist option and 6 L reservoir against its larger listed height and depth; no performance premium is established here.
Current offers change, and there is no price history here to judge whether today's price is unusually good; check the live offers and terms before ordering.
Is the upgrade worth it?
Worth considering if
- Buyers who specifically want a warm-mist setting.
- Buyers who value a 6 L reservoir and can fit the HM713S's listed dimensions.
Skip the upgrade if
- Cool mist and the 4 L HM311S tank fit your needs better.
- The HM713S's 13.93 in listed height or 11.41 in depth will not fit the intended location.
Limitations
- DREO's exact HM311S page advertises Auto Mode, while its model-selection chart leaves the HM311S Auto Mode cell unmarked; this comparison does not use Auto Mode to distinguish the models.
- DREO's listed tank capacities and dimensions do not establish matched real-world runtimes, humidity results, or room coverage. The company notes that water use depends on environment and that warm-mist use consumes water faster.
- The published dimensions are product measurements, not required installation clearances. Leave enough access for filling and follow the product instructions for placement.
- No health, therapeutic, safety, or comfort outcome is inferred from the warm-mist feature.
Questions shoppers ask
Does the HM713S's 6 L tank mean it will run 50% longer?
No. Six liters is 50% more listed capacity than four liters, but it does not establish a 50% runtime increase. DREO says water use varies with room conditions and that warm-mist use consumes water faster; the published pages do not provide a matched runtime test for these two models.
Methodology and sources
We compared DREO's exact model pages and its model-selection chart on mist choices, listed tank capacities, and listed dimensions. We did not test humidity performance, room coverage, or runtime.
Automated tools helped organize the cited manufacturer information; no product testing was performed.
View 3 sources
- 1.DREO HM311S 4L Smart Cool Mist Humidifier for BedroomDREO · Official specifications · Source checked 2026-10-17 20:58 UTC
Evidence used on this page
- Product title and feature list; Specifications: water tank capacity and product dimensions.: The U.S. product page identifies the 311S as a cool-mist humidifier and lists a 4 L tank and dimensions of 5.51 in D × 11.02 in W × 10.16 in H. It is a model page with color/package options; no box-content claim is made here.
- 2.DREO HM713S 6L Smart Warm & Cool Mist Bedroom HumidifierDREO · Official specifications · Source checked 2026-10-17 20:58 UTC
Evidence used on this page
- Product title/feature list; Specifications: tank capacity and product dimensions; FAQ: water use.: The U.S. product page identifies HM713S as a warm-and-cool-mist model and lists a 6 L tank and dimensions of 11.41 in D × 6.14 in W × 13.93 in H. Its FAQ says water use varies with environment and warm-mist use consumes water faster.
- 3.The Best Buyer's Guide for DREO HumidifierDREO · Official specifications · Source checked 2026-10-17 20:58 UTC
Evidence used on this page
- DREO Humidifier Series Comparison Cheat Sheet, HM311S and HM713S columns, Tank Size and Cool & Warm Humidification rows.: The maker's selection chart includes both models, lists 4 L and 6 L tank sizes, and marks the cool-and-warm option for HM713S. It is a qualitative model-selection source, not a controlled comparison.