AC Infinity SUNCORE Heat Mat – Digital Controller, IP-67
AC Infinity SUNCORE Heat Mat – Digital Controller, IP-67
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Description
Bottom heat with a controller, not a guess
Most seedling mats are a bare heating element with no way to know what they are doing. The AC Infinity SUNCORE ships with a digital controller that reads the mat's own temperature and holds a set point, so the root zone is warmed to a figure rather than simply warmed.
The element is far-infrared film laminated between multi-layer PVC, and the whole mat is IP-67 rated — which matters, because a propagation mat spends its life under trays that get watered.
Key Benefits
- Digital controller included, displaying both mat temperature and set point
- IP-67 waterproof — built for the one place water is guaranteed
- Far-infrared heating film spreading heat evenly rather than in strips
- 2.48mm thick, so trays sit flat on it
- MET and UL certified
Which size do I need?
H3 is 25.4 × 52.7cm — a single standard tray. H5 is 50.8 × 52.7cm, which takes two trays side by side or one large dome.
Specifications
- H3: 25.4 × 52.7cm, 20W maximum
- H5: 50.8 × 52.7cm, 40W maximum
- Thickness: 2.48mm
- Heating element: far-infrared film
- Outer material: multilayer PVC
- Rating: IP-67, MET and UL certified
- Cord: 152.4cm mat to controller
- Warming: raises the rooting area by up to 20°F above ambient, set through the controller
Technical Specifications
- Type: seedling heat mat with digital controller
- Heating element: far-infrared film
- Outer material: multi-layer PVC
- Controller: digital, shows mat temperature; set range 0–50°C
- Heating: up to about 11°C above room temperature
- Protection: IP67
- Supply voltage: 230 V AC
- Warranty: 2 years
| By size | H3 – 25 x 53cm | H5 – 51 x 53cm |
|---|---|---|
| Max power | 20 W | 40 W |
| Model | AC-SMH3 | AC-SMH5 |
| Dimensions | 25.4 x 52.7cm | 50.8 x 52.7cm |
Questions & answers
What sizes are there?
H3 at 25.4 x 52.7cm (20W) for a single standard tray, and H5 at 50.8 x 52.7cm (40W) for two trays side by side or one large dome.
How does it compare with our Propagation Heat Mat?
The sizes are similar: our mat comes in 25 x 52cm, 50 x 52cm and 120 x 52cm and is best paired with a separate thermostat. The SUNCORE has a digital controller included that reads the mat's temperature and holds a set point.
How warm will it get?
It raises the rooting area by up to 20°F (about 11°C) above the room temperature, set through the controller.
Is it waterproof?
Yes, the mat is IP-67 rated, with far-infrared heating film laminated between layers of PVC.
How long is the cord?
152.4cm from the mat to the controller.

FREE Express Delivery on orders over £99. We aim to post same day on Express Delivery — order by 3pm Mon–Fri — and delivery takes 1–2 working days. A few harder-to-stock or large, bulky items can take a little longer — we'll tell you if that applies to your order. Heavy-item surcharges are always shown at checkout before you pay — we only ever charge what delivery costs us. Prefer to collect? Free pickup at our Wembley store.
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The mat was very easy to use.
Just what I needed.
