The short answer
The WarmlyYours WHMA-240-0215 publishes 50 W/sq ft over 30 sq ft and draws 6.25 A at 240 V for $449. The ThermoSoft TSMM030W36-240 publishes 48 W/sq ft over 90 sq ft and draws 18.1 A at 240 V for $889.97. Per heated square foot, that’s $14.97 for WarmlyYours against $9.89 for ThermoSoft — scale favours ThermoSoft on mat price alone. WarmlyYours publishes a 10-year warranty; our ThermoSoft record has no warranty figure at all, not a shorter one. Neither manufacturer publishes a melt rate, so there is no melt-rate verdict on this page.
Both published a W/sq ft — that’s rare enough to say so
Most of the portable-mat market on this site runs on unpublished wattage, bounded only by amps and a stated tolerance. These two embedded-cable products are different: WarmlyYours states 50 W/sq ft and ThermoSoft states 48 W/sq ft, both as manufacturer specifications, not something we derived. That two-point gap is close enough to call the mats comparable on heat flux — a genuine like-for-like, not a case where one brand happens to publish a number and the other doesn’t.
Total wattage is where the two records diverge in kind, not just degree. WarmlyYours publishes 1,500 W total for the WHMA-240-0215 directly — it’s on the spec sheet. ThermoSoft does not publish a total-watt figure for the TSMM030W36-240; the 4,320 W we show is derived by multiplying its published 48 W/sq ft by its published 90 sq ft of coverage. That’s arithmetic on two real inputs, not a manufacturer total, and we’re not presenting it as one. Multiplying 240 V by ThermoSoft’s published 18.1 A gives a slightly different figure than the W/sq ft-derived total — the gap is rounding in the published per-square-foot number, and neither route produces a figure ThermoSoft itself states.
For context on where 48-50 W/sq ft sits in the broader embedded-cable market: across the seven embedded-cable records in our data, published wattage runs 41-50.09 W/sq ft (ThermoSoft’s NeverFreeze line at the low end, WarmlyYours’ snow-melting mats at the high end). Both products in this comparison sit at the top of that band.
What $449 and $889.97 actually buy, per heated square foot
WarmlyYours prices the WHMA-240-0215 at $449 MSRP for 30 sq ft of coverage — $14.97 per sq ft. ThermoSoft prices the TSMM030W36-240 at $889.97 for 90 sq ft — $9.89 per sq ft. Buying three times the area from ThermoSoft costs roughly double the dollars, which is what drives the per-square-foot gap: ThermoSoft’s mat is the cheaper way to cover ground, at least on mat price.
Both of those figures are mat-only. Neither includes the concrete or asphalt work the cable gets embedded in, the control, or the electrician’s labor. For a sense of what installed cost actually runs, WarmlyYours’ own cost-breakdown page (checked 2026-07-25) gives $8-$25 per sq ft installed, including materials and labor, for electric snow-melting cable or mat set into a new pour — a range that comes from the same manufacturer that makes one of these two mats, so treat the low end as a best case rather than a typical one. That range dwarfs the $5-$10 difference in mat price between these two products; the installation, not the cable, is where most of the money goes.
6.25 A vs 18.1 A at 240 V — what each draw means for the circuit
WarmlyYours publishes 6.25 A at 240 V for the WHMA-240-0215. ThermoSoft publishes 18.1 A at 240 V for the TSMM030W36-240 — just under three times the current draw, on a mat three times the size. Both are dedicated 240 V embedded circuits requiring ground-fault protection per NEC 426, not something a homeowner runs off an existing outlet.
The gap in amperage matters for circuit sizing before it matters for anything else. A 6.25 A continuous load leaves generous headroom on a standard residential 240 V circuit; an 18.1 A continuous load is a heavier draw that is more likely to need a larger breaker and heavier conductor to stay within code. Neither of these products’ data records publishes a maximum-amps-per-circuit figure or a GFCI trip rating, so we can’t state exact breaker sizing from what’s published here — and we wouldn’t walk through 240 V hardwiring steps on this page in any case. Sizing the circuit, the breaker and the ground-fault protection for either mat is a job for a licensed electrician working from the mat’s nameplate and local code, not a number we compute from a spec sheet.
A warranty you can compare, and one you can’t
WarmlyYours states a 10-year warranty for the WHMA-240-0215, alongside cCSAus listing. That’s a published term we can cite directly.
Our ThermoSoft record has no warranty figure. That is not the same as “no warranty exists” — it means the data we have does not carry a stated term, and we’re not going to imply one either way. A prospective buyer comparing these two mats on warranty coverage currently has one real number (10 years, WarmlyYours) and one open question (ThermoSoft), and the honest way to present that gap is to leave it a gap rather than round it to “similar.”
The melt-rate line we’re not writing
Every mat on the market claims a melt rate, and it’s the manufacturer’s own marketing figure, not an independent measurement — that’s true across this entire site. Neither the WarmlyYours WHMA-240-0215 record nor the ThermoSoft TSMM030W36-240 record carries a published melt rate at all, so there’s no marketing claim to repeat here and no melt-rate verdict to render. What this page can settle is watts, price per square foot, amp draw and warranty — all four are published numbers on both products, which is more than most head-to-heads on this site can say.
Who should not buy either mat
Neither of these is a fit for someone shopping for a plug-in, movable solution — both are embedded cable systems meant to go into a new concrete or asphalt pour, or under pavers, and neither can be relocated once installed. If the project is an existing driveway that isn’t being repoured, an embedded mat isn’t the right category regardless of which brand wins on price.
Anyone comparing total project cost rather than mat cost should also treat the $14.97-vs-$9.89 figure with caution: it’s the smallest line item in an installed system whose total, per WarmlyYours’ own $8-$25/sq ft range, is set mostly by concrete and electrical labor that neither manufacturer controls.
Two plain cons worth stating: ThermoSoft’s 18.1 A draw is a meaningfully heavier circuit load than WarmlyYours’ 6.25 A, which may push installation toward a larger breaker and more conductor — a real cost the per-square-foot mat price doesn’t capture. And ThermoSoft’s missing warranty figure means a buyer choosing it on price alone is doing so without the coverage term WarmlyYours puts in writing.
Readers weighing the load these two mats would put on a home’s electrical service alongside other combinations can work through our circuit and coverage planner; the long-run cost comparison against other snow-clearing approaches runs through our break-even tool. Current pricing for either mat should be checked against the manufacturer’s own listing before comparing further.
Side by side
| Spec | WarmlyYours WHMA-240-0215 | ThermoSoft TSMM030W36-240 |
|---|---|---|
| Coverage | 30 sq ft | 90 sq ft |
| Amp draw | 6.25 A | 18.1 A |
| Rated power | 1500 W | 4320 W |
| Watts per sq ft | 50 W/sq ft | 48 W/sq ft |
| Melt rate | not published | not published |
| Weight | 8 lb | not published |
| Warranty | 10 yr | not published |
| Listed price | $449.00 | $889.97 |
| Cost per sq ft heated | $14.97 | $9.89 |
No winner is marked for coverage, amp draw, rated power, watts per sq ft, melt rate, weight, listed price, because every one of those scales with how big the product is — "lowest amps" would only ever mean "smallest mat". The comparison that survives a size difference is cost per square foot heated, and it is derived by us from the listed price and the coverage, not published by anyone. No winner is marked for warranty either — at least one product does not publish that figure. Declaring a winner across a blank or across a derived figure would invent a difference the sources do not support.
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