WarmlyYours' embedded snow-melt cable publishes 50 W/sq ft and 6.25 A at 240 V — real numbers most portable mats don't. Here's what $14.97/sq ft actually buys.
WarmlyYours does not publish a melt rate for this product, so this review carries no melt-rate verdict. There is nothing to compare against snowfall, and we will not estimate one.
The headline number, and why it’s rare
WarmlyYours publishes 50 W/sq ft for the WHMA-240-0215 embedded snow-melting cable — a real wattage, stated on the manufacturer’s own product page, not derived from volts times amps. That distinction matters more here than almost anywhere else on this site: most portable mats we track publish an amp draw and a voltage and stop there, leaving wattage unpublished because apparent power (volts × amps) is not the same thing as real power, and this niche’s whole differentiator is watts. The WHMA-240-0215 is one of the few products in our data file where we don’t have to say “unpublished” in the second sentence.
The catch, and it’s a real one: this is embedded cable, meant to go into a concrete or asphalt pour or under pavers, not a mat you unroll on an existing driveway. The number on the box is a coil of cable. The number on the invoice is a construction project.
What $14.97 per square foot is, and what it is not
WarmlyYours lists the WHMA-240-0215 at $449 MSRP for 30 sq ft of coverage (checked 2026-07-25). Dividing $449 by 30 sq ft gives $14.97 per sq ft — a figure we derived from two published numbers, not one WarmlyYours states directly. That product-only price is what makes this system look competitive against portable mats, which run roughly $27–$54 per sq ft of product on this site. It is not, however, the price of a heated driveway.
WarmlyYours separately publishes an installed cost of $8–$25 per sq ft for electric snow-melting cable set into a new pour, covering materials and labor together (a second WarmlyYours page gives $10–$25 over the same period; we use the wider range because it contains the narrower one, and note both are the manufacturer’s own figures for its own product category, so treat the low end as a best case). That range is for the whole embedded-cable category, not this SKU specifically, and it does not include the concrete or asphalt itself, the snow-melt control, or the electrician’s time on the 240 V circuit. A portable mat’s price is close to the whole cost of ownership. This cable’s $14.97/sq ft is the beginning of one.
6.25 A at 240 V — a different circuit conversation entirely
WarmlyYours publishes 6.25 A at 240 V for the WHMA-240-0215, with no tolerance band stated in the source we checked — unlike some portable-mat amp figures on this site, which carry an explicit ±10% and therefore can’t support a single-number circuit answer. Here, 6.25 A is what’s published, plainly.
The 240 V basis is the bigger story. Most residential portable mats run on a standard 120 V outlet; this cable does not. A 240 V circuit is a different branch-circuit calculation, a different breaker size, and — because this is a permanent embedded load — a dedicated circuit with ground-fault protection under NEC 426, per the manufacturer’s own circuit notes. That is not a DIY afternoon. We describe the specification here; we don’t walk through hardwiring steps, and neither should anyone without a license. Sizing the circuit, the breaker, and the ground-fault protection for a specific driveway is a job for a licensed electrician, not a spec page.
Ten years on the cable versus two years on a mat
WarmlyYours states a 10-year warranty on the WHMA-240-0215. Portable mats on this site typically carry a much shorter warranty — commonly around 2 years for residential lines. A warranty is a liability term, not a service-life guarantee, and we’re not converting it into one; but a 10-year term against a 2-year term is a real, published difference, and it’s the kind of number that matters once the cable is under three inches of concrete and cannot be swapped out over a weekend the way a mat can be rolled up and returned.
That permanence cuts both ways. If a coil fails in year 11, or even year 4 outside the warranty window, replacement means breaking out pavement. A mat that dies in year 3 gets carried to the curb.
What WarmlyYours does not publish: a melt rate
WarmlyYours does not publish a melt rate for the WHMA-240-0215, and we did not find one to cite. That’s actually a point in the product’s favor compared to how melt-rate claims usually work on this site: every portable mat on the market advertises a melt rate, and it is uniformly the manufacturer’s own marketing figure, not an independent measurement — something we say every time we quote one. Here there’s no figure to caveat, because there isn’t one. This review carries no melt-rate verdict for this product, and we are not going to estimate one from the published BTU output (5,118 BTU/h) or the 50 W/sq ft figure, because doing so would be presenting a derived guess as if it were the manufacturer’s claim, which is the same category of error as inventing a wattage.
Where the manufacturer says this configuration belongs
WarmlyYours recommends the 50 W/sq ft, 3-inch cable spacing used in the WHMA-240-0215 “for regions with 60+ inches of annual snowfall or when rapid melting is critical,” per the product documentation. NOAA’s 1991–2020 normals put the Great Lakes Snowbelt (Buffalo reference station) at 94.7 in of annual snowfall — comfortably inside that recommendation. The Upper Midwest zone (Minneapolis-St. Paul reference station) averages 54.4 in, below the manufacturer’s own 60-inch threshold, though Duluth within that same zone runs 86.1 in, illustrating how much a single zone figure can hide.
Running the numbers on electricity cost: 1,500 W of published draw, converted to 1.5 kW, against the Great Lakes Belt’s blended residential rate of 20.42 cents/kWh, comes to roughly $0.31 per hour of operation — a figure we derived from two published inputs, not a WarmlyYours number. WarmlyYours’ own runtime cross-check for a 400 sq ft, 50 W/sq ft driveway system suggests 50 to 120 hours of running time per season across roughly 10 to 20 storms; scaled by that same per-hour cost, a season lands somewhere between roughly $15 and $37 for the Great Lakes Belt, and lower in the Upper Midwest at its 15.59 cents/kWh rate. That cross-check comes from a different-sized system in the same wattage class, not this specific 30 sq ft product, and we’re showing both the manufacturer’s runtime figure and the zone’s electricity rate side by side rather than pretending they reconcile into one house number. Visitors comparing this to a season of plow contracts or to a portable-mat setup can run their own numbers with our break-even tool or storm cost tool.
Who should not buy this
Anyone not already pouring, repaving, or renovating a driveway, walkway, or paver surface should not buy the WHMA-240-0215. This is not a seasonal accessory — it is cable that goes into wet concrete or under pavers before the surface exists, or it doesn’t go in at all. A homeowner with an existing driveway who wants heat this winter is looking at a portable mat, not this product, regardless of how the wattage and warranty numbers compare.
Two more reasons to pass: first, the product-only price of $14.97/sq ft tells a reader almost nothing about total project cost, since it excludes the pour, the control, and the electrician, and WarmlyYours’ own installed-cost range ($8–$25/sq ft) is wide enough that a firm number requires a local contractor quote, not this page. Second, the absence of a published melt rate means there is no manufacturer claim at all to weigh against a portable mat’s marketing figure — a reader who wants a side-by-side melt-speed comparison won’t find one here, on either side.
Anyone comparing this cable’s operating draw against a portable mat’s unpublished wattage should use our layout planner to see how coverage area and circuit sizing change the comparison, and should still confirm any final circuit plan with a licensed electrician before signing off on the pour.
Check price at manufacturer$449.00 when we checked on 2026-07-25
Specifications
Specifications — WarmlyYours WHMA-240-0215
| Dimensions | 24 × 180 in |
|---|---|
| Coverage | 30 sq ft |
| Voltage | 240 V |
| Amp draw | 6.25 A |
| Rated power | 1500 W |
| Watts per sq ft | 50 W/sq ft |
| Melt rate | not published |
| Surface temperature | not published |
| Thickness | 0.3125 in |
| Weight | 8 lb |
| Cord length | 20 ft |
| Connector | 20 ft cold lead; heating cable on 3 in spacing in a cut-and-turn mat |
| Material | not published |
| Warranty | 10 years |
| Certification | cCSAus Listed |
| MSRP | $449.00 |
| Listed price | $449.00 Checked 2026-07-25. |
CircuitEmbedded system — requires a licensed electrician, a dedicated circuit and a snow-melt control. Ground-fault protection per NEC 426.
Every figure above has been checked against the source document by a human reviewer. Tier 1 source. Model status checked 2026-07-25. Sources: warmlyyours.com
In the Great Lakes Snowbelt (MI, northern OH/IN, western NY)
Melt gauge — WarmlyYours WHMA-240-0215 in Great Lakes Snowbelt (MI, northern OH/IN, western NY)
WarmlyYours does not publish a melt rate for this product, so there is nothing to compare against snowfall.
Running cost — Great Lakes Snowbelt (MI, northern OH/IN, western NY)
- Power draw
- 1500 W
- Per design-day storm
- —
- Per normal season
- —
- Electricity
- 20.42¢
- Power draw is the manufacturer's published rating of 1500 W.
- Electricity at 20.42¢/kWh (USD). Unweighted mean of the January 2026 EIA residential price for MI, NY, OH, IN.
In the Mid-Atlantic Corridor (NJ, eastern PA, MD, DE, northern VA, NYC metro)
Melt gauge — WarmlyYours WHMA-240-0215 in Mid-Atlantic Corridor (NJ, eastern PA, MD, DE, northern VA, NYC metro)
WarmlyYours does not publish a melt rate for this product, so there is nothing to compare against snowfall.
Running cost — Mid-Atlantic Corridor (NJ, eastern PA, MD, DE, northern VA, NYC metro)
- Power draw
- 1500 W
- Per design-day storm
- —
- Per normal season
- —
- Electricity
- 20.78¢
- Power draw is the manufacturer's published rating of 1500 W.
- Electricity at 20.78¢/kWh (USD). Unweighted mean of the January 2026 EIA residential price for NJ, PA, MD, DE, VA, NY.
In the Sierra Nevada & Cascade Mountain Communities
Melt gauge — WarmlyYours WHMA-240-0215 in Sierra Nevada & Cascade Mountain Communities
WarmlyYours does not publish a melt rate for this product, so there is nothing to compare against snowfall.
Running cost — Sierra Nevada & Cascade Mountain Communities
- Power draw
- 1500 W
- Per design-day storm
- —
- Per normal season
- —
- Electricity
- 18.19¢
- Power draw is the manufacturer's published rating of 1500 W.
- Electricity at 18.19¢/kWh (USD). Unweighted mean of the January 2026 EIA residential price for CA, OR, WA, NV.
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