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THERMA TECH 3400, 3 Layer, EPS Insulated

(1 customer review)

The Northwest Door Therma Tech 3400 is the first in our line of insulated raised steel panel doors, offering six wood grain textured panel designs to choose from. These durable doors are hot-dipped galvanized and come in a range of attractive colors. With its stylish appearance and excellent insulation, the Therma Tech 3400 is a perfect choice for enhancing your home’s curb appeal.


The Therma Tech 3400 (previously marketed as Therma Tech) is a fantastic addition to Hörmann’s Therma Tech™ line of insulated raised steel panel doors, known for their quality, value, and stylish designs. With six wood grain textured panel options to choose from, including Short Raised, Long Raised, Shaker, Country Panel, Cottage Panel, and Flush, you can effortlessly find the perfect match for your home’s aesthetics. The door’s 1-1/2″ thick EPS core ensures exceptional insulation with an R-value of 7.4, making it ideal for colder climates, where it provides the best long-term insulating value.

To enhance its durability and energy efficiency, the Therma Tech 3400 features a reliable Tongue and Groove joint between sections with a Thermal Break, while the U-shape loop type vinyl bottom weather seal keeps out the elements effectively. The doors are also pre-painted with a baked-on polyester enamel finish in five standard colors: Bright White, Almond, Sandstone, Black, and Brown. For a touch of elegance, you can opt for the Dark or Medium wood grain finish, available on certain panel styles. With Hörmann’s Therma Tech 3400, you can elevate your home’s appearance and energy efficiency, all in one fantastic package.


Northwest Door website – THERMA TECH 3400

Additional information




1-1/2" EPS

Paint Method

No Special Paint Options

Wind Rating

No Information on Wind Rating



Environmental Assurance

No Information on Environmental Assurance


Yes, request a quote for more info.

Design Options

Glass Options

Color Options




Northwest Door warranty information



Metal Door Painting Instructions


1 review for THERMA TECH 3400, 3 Layer, EPS Insulated

  1. Hazel P

    Perfect for just a simple garage door.

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