Model comparison
DREO Heater 320 vs Whole-Room Heater 517: manual tilt or added sweep?
DREO's compact Heater 320 and Whole-Room Heater 517 both let you set the vertical angle of their front outlet by hand. That shared feature can obscure their main difference: the 517 also turns its outlet across a powered horizontal arc, while the Heater 320's US materials document only manual vertical tilt. Both are indoor PTC fan heaters, but the extra sweep and larger body on the 517 may matter more than their similar heat steps.
Know which “320” the documents mean
The current US product page calls the smaller model Heater 320; the support page names it Ceramic Heater 320, and the manual cover uses PTC Fan Heater Atom 320. The DREO support route identifies DR-HSH020, while the US collection row attaches Black SKU 10-04020-101 to product ID 8746740744354. These are different labels for the same observed US listing, not evidence that another 320 variant is interchangeable. The Whole-Room Heater 517 is the separate DR-HSH037, with White SKU 10-040371-005 and Black SKU 10-040371-003.
Manual tilt versus powered sweep
The Heater 320's manufacturer materials document a 0–60-degree vertical tilt that you set by hand. The US manual says to hold the bottom or side of the base while changing angle to avoid contacting the controls or air outlet. It does not document a powered sweep, so do not shortlist it to meet a requirement for automatic side-to-side or up-and-down movement. The 517's US product page documents 70-degree horizontal oscillation plus a 60-degree manual vertical tilt. That makes it the more flexible choice when you want the stream to travel across a chair or work area without repositioning the appliance. Its vertical adjustment remains manual, not a second powered axis; compare the 714 or 715 if powered movement on both axes is essential.
Body size is not operating space
DREO lists the 320 at 10.12 inches high, 5.71 inches wide, 9.65 inches deep and 3.54 pounds. The 517 is 14 inches high, 11.2 inches wide and 7.6 inches deep in the product information inspected. A strict body-height question therefore favors the shorter 320, but neither set of figures describes the open space needed while the heater is running. The DR-HSH020 manual requires a flat, stable surface, three feet in front of combustibles and distance from the sides and rear. The 517's manual also requires its own placement clearances. Measure that operating envelope separately; a compact housing is not permission to set the heater close to bedding, curtains or a walkway.
Their everyday controls overlap
Both US manuals specify a 1,500-watt maximum and three heat steps at 900, 1,300 and 1,500 watts. Each has ECO temperature control from 41°F to 95°F, fan-only operation with three speeds and a 0–12-hour shutoff countdown. Neither manual describes that countdown as a delayed start. Each also has a separate 24-hour continuous-run cutoff that is off by default and runs its fan for about 30 seconds after a normal shutoff. The smaller 320 remote uses one supplied CR2025 cell; the 517 remote uses two AAA batteries. Do not infer app support for either from the shared controls: the exact US documents inspected do not establish it as a requirement-satisfying feature.
Which one fits your routine?
Choose the Heater 320 if the 10-inch body height, light weight and manually set upward or downward aim solve your space problem, and you can keep the full safety zone clear. Choose the 517 if a broader powered horizontal sweep justifies its wider body and you still want manual vertical aim. Neither is fanless: both use forced air for heat, even though each can run its fan without heat. For still-air warmth, the 711 and 711S are convection alternatives with different floor-versus-wall installations. For automatically powered movement both horizontally and vertically, compare the Whole-Room 714 and 715 instead of treating hand-adjustable tilt as oscillation.
Read the Heater 320 assessment and the Whole-Room Heater 517 assessment. Their manuals remain the authority for exact placement, power and care; neither published body dimensions nor a product image establishes a room-size result.