Jump Start Commercial Seedling Heat Mat Modular Add-on, 60" x 21", 140W

Modular Add-On for Expanding Commercial Heat Mats

Expanding a commercial propagation bench usually means wiring in a whole extra heat mat with its own cord and controller, which gets unwieldy past a couple of mats. This add-on unit daisy-chains directly onto the Jump Start Commercial Heat Mat (MTMDU) instead, extending the same uniform 10 to 20 degree Fahrenheit root-zone warming across a matching 60 x 21 inch, 140 watt mat without adding a second cord or controller to manage.

This add-on unit daisy-chains to the Jump Start Commercial Heat Mat (MTMDU) to expand your seed starting area, with up to 4 add-on units supported on a single chain, which must include a Digital Heat Mat Thermostat (MTPRTC), sold separately.

Key Features & Benefits

• 60 x 21 Inch, 140 Watt Add-On Mat — matches the MTMDU base unit's footprint and output.
• Extends an Existing Chain — up to 4 add-on units can connect to one MTMDU base unit.
• Rugged, Waterproof Connectors — built for repeated greenhouse use.
• No Separate Cord or Controller — runs off the base unit's single thermostat connection.

Who Should Use This Add-On Mat

Growers expanding an existing Jump Start Commercial Heat Mat setup who need more seed starting area without wiring in a separate mat.

About Jump Start

Jump Start, a Hydrofarm brand, sells this add-on mat as the expansion piece of its modular commercial heat mat system, letting growers scale bench coverage in matching 60 x 21 inch increments instead of installing separate standalone mats.

Frequently Asked Questions

Can this unit be used on its own?

No, it's an add-on unit that must daisy-chain to an MTMDU Commercial Heat Mat base unit. It doesn't plug into a wall outlet independently.

How many units can be chained together?

Up to 4 add-on units plus the MTMDU base unit, for 5 total mats on one chain. That covers a large bench section from a single thermostat.

What size is this mat?

60 inches by 21 inches, matching the MTMDU base unit it connects to. Every mat in the chain runs at the same 60 x 21 inch footprint.

Is a thermostat included?

No, the Digital Heat Mat Thermostat (MTPRTC) is required for the chain to run and is sold separately. It connects at the start of the chain, on the MTMDU unit.