Stelpro Prima ASPRL0502W
#5 in BaseboardFull review
A tidy, low-profile 500 W baseboard for a small bedroom or bathroom, with a long warranty. You pay for the design.
Amazon $126.60$126.60
The Stelpro Prima ASPRL0502W rates 3.2 among baseboard baseboard or wall heaters; the Qmark HBB504 rates 2.4 among hydronic baseboard ones. The Stelpro Prima ASPRL0502W costs $220.55 less ($126.60 vs $347.15).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Qmark HBB504
A 500 W liquid-filled baseboard that gives soft, even heat with no plumbing. Expect to pay several times the price of a plain baseboard.
Amazon $347.15$347.15
Scores side by side
These two sit in different type classes (baseboard and hydronic baseboard), and each is scored against the reference points for its own class, so a rating says how well each does among its own type peers. How we rank explains each factor.
| Factor weight | Stelpro Prima ASPRL0502W | Qmark HBB504 |
|---|---|---|
| Overall rating | 3.2/5 | 2.4/5 |
| Value 35% | 24 $253.20 per kW ($126.60, 500 W) | 0 $694.30 per kW ($347.15, 500 W) |
| Controls 25% | 20 optional built-in thermostat kit | 20 optional built-in thermostat kit |
| Safety 15% | 75 full-length overheat cutout | 75 full-length overheat cutout |
| Warranty 25% | 100 5-year warranty, lifetime on the element | 40 1-year warranty, 10-year on the element |
Specifications
| Stelpro Prima ASPRL0502W | Qmark HBB504 | |
|---|---|---|
| Heat | ||
| Type | Convection baseboard | Hydronic baseboard |
| Rated output | 500 W (375 W on 208 V) | 500 W (375 W on 208 V) |
| Voltage | 240/208 V | 240/208 V |
| Length | 36.1 in | 28 in |
| Output per foot | 166 W/ft | 214 W/ft |
| Heating element | Stainless steel sheathed tubular element with boxed aluminum fins | Nickel-chromium wire immersed in heat-transfer liquid in a copper tube, aluminum fins |
| Maker's heating area | 50 sq ft | 60 sq ft |
| Controls | ||
| Thermostat | Optional built-in kit | Optional built-in kit |
| Selectable wattage | No | No |
| Remote or timer | No | No |
| Safety | ||
| Overheat cutout | Automatic reset | Automatic reset |
| Full-length limit | Yes | Yes |
| Build | ||
| Weight | 8.5 lb | 10 lb |
| Warranty | 5 years, element lifetime | 1 year, element 10 years |