AC Infinity SUNCORE S3, Waterproof Seedling Mat with Heat Controller 10" x 20.75", UL & MET Certified Heating Pad, for Indoor Gardening, Hydroponics, Germination, Cloning
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FREE refund/replacement until Jan 31, 2026 Learn more
FREE refund/replacement until Jan 31, 2026 Learn more
This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2026
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Availability:
In Stock.
Arrives
Saturday, Dec 6
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Size: 10" x 20.75"
Features
- A heating mat designed to accelerate and improve the success of seed starting and germination.
- Features an innovative far-infrared film that warms up faster, and distributes soft heat more evenly.
- Adjustable dial controls heat output over time, without turning the mat on/off which disrupts growth.
- Crafted with IP-67 quad-layer PVC thats flexible, resistant to wear-and-tear, and easy to wipe clean.
- Verifiable UL (E518635) & MET (E115128) certifications for electrical safety thru online directories.
Indoor/Outdoor Usage: Indoor
Brand: AC Infinity
Color: Black, 10" x 20.75"
Soil Type: Sandy Soil
UPC:
Style: 10" x 20.75"
Product Dimensions: 20.75 x 3 x 0.09 inches
Item Weight: 1.08 pounds
Manufacturer: AC Infinity
Item model number: GT-AHWM-LB0L
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Saturday, Dec 6
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
This heats evenly and kept my seedlings worm in a cooler part of the house. It did not have a timer so I just plugged it into a lamp timer. Simple and easy to use.
Reviewed in the United States on October 10, 2025 by DCLW
Does its job. Amazing. Still works after years.
Reviewed in the United States on August 17, 2025 by Amazon Customer
Came with a nice-quality booklet on growing weed. Not my interest, but nicely done. AC Infinity has a lot of quality in their workmanship and packaging. This is a seedling mat, there's not a lot to say, but: It has a nice bag for storage, which is a nice touch. It has a high/medium/low knob that is *smoothly* adjustable (not just three positions). It kept my baby ducks from dying of cold, without using a ton of power, so there's that. Note: for keeping critters warm, use a thick layer of insulation/bedding (hay, sawdust, or similar) underneath the mat, but only a thin comfort layer on top of the mat, so the heat gets through. Even a small amount of consistent heating can get very hot if well-insulated on both sides, so monitor temperatures well, and don't put enough bedding on top that it acts as an insulator. Also, always make sure your critters have unheated space available, so they can cool off.
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Reviewed in the United States on March 17, 2023 by Meow Mix
Was the right size, seems well put together and looks nice. Doesn't get too hot after 10 hours on high and seems to be running well.
Reviewed in the United States on July 26, 2025 by Ben Porter
I use this in the winter in my cats bed. She loves it
Reviewed in the United States on April 26, 2025 by Ken R.
I used this very basic heat mat to warm some transplants to stimulate root growth and it works well. You plug it in, under the little greenhouse dome you may be using and the gentle heat from the mat does the rest. It's basic and it works well with no complaints . Did not monitor temperature, so I took it at face value, nothing was over-heated or damaged, so it's fine. Just needed to provide steady heat to my cuttings and did not go the whole "scientific" route of monitoring, just plug and play. Very basic, works fine IMO and I'd buy one again, and recommend for simple, basic needs.
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Reviewed in the United States on November 22, 2023 by Spacey
One of the best in the business and I love this heating mat. It works perfectly for a germinating seedlings, which is what I needed it for.
Reviewed in the United States on February 26, 2025 by jason karr
I recently purchased the AC Infinity SUNCORE S3 Waterproof Seedling Mat with Heat Controller for my indoor gardening needs. While the heating pad itself functions well and is UL & MET certified, there are a couple of areas where I feel it could be improved. Firstly, it would be more convenient if the SUNCORE S3 readily connected to the 69PRO control system. As someone who already owns the 69PRO, it would have been great to have seamless integration between the two devices. It would have made temperature control and monitoring much easier, eliminating the need for multiple controllers. Additionally, the absence of a built-in temperature gauge is a slight drawback. Having an integrated temperature gauge would provide real-time monitoring of the heat levels, allowing for better precision and control over the germination and cloning processes. That being said, the SUNCORE S3 does function as described and provides consistent heat for my seedlings. The waterproof feature is a plus, as it adds an extra layer of protection and peace of mind. The 10" x 20.75" size is suitable for small to medium-sized gardening setups. In summary, while the AC Infinity SUNCORE S3 Waterproof Seedling Mat with Heat Controller is a reliable product, I believe it could be enhanced by offering seamless connectivity to the 69PRO control system and incorporating a built-in temperature gauge. These improvements would elevate the user experience and provide more comprehensive control over the heating process.
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Reviewed in the United States on September 17, 2023 by Jim Jim