envelopelearning@mainstreamcorporation.com phone303-912-4833

Mainstream Corporation

3. Controllers & Sensors

6. Registers & Diffusers

PreHeaters

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Warm-Flo 2.5KW Preheater
Warm-Flo 2.5KW Preheater

Optional external preheater for the ComfoAir 350 or 550 units.

$872.55

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Warm-Flo 1KW Preheater
Warm-Flo 1KW Preheater

Optional external preheater for the ComfoAir 350 or 550 units.

$785.40

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Mainstream Corporation is a Colorado based Passive House Design, Consulting firm. Specializing in Passive House Products for your building project.

  • marker2017 South US HWY 287
    Berthoud, CO 80513
  • phone303-912-4833
  • envelopelearning@mainstreamcorporation.com
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