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Transparent defrost kit with 2 inch flex hose and 10 inch flux duct

Maradyne

Maradyne MFA126 Defrost Kit 2 in Flex Hose 10 in Flux Duct

SKU CH-QKQC-3R2J7

A defrost kit with 2 in flex hose and 10 in flux duct for compatible heaters

  • TypeAutomotive Service & Shop Tools
  • ColorTransparent
  • Defrosts vehicle heaters quickly with included 2 in flex hose
  • Connects directly to H-503012 and H-803012 heater models
  • Fits Grainger part numbers 45EC03, 45EC04, 45EC07, 45EC078
  • Transparent duct allows visual airflow inspection
  • Ready-to-install kit includes 10 in flux duct section

Maradyne MFA126 Defrost Kit

The Maradyne MFA126 Defrost Kit is a solar‑compatible accessory designed for automotive service and shop environments. It includes a transparent 2‑in flexible hose and a 10‑in flux duct to direct warm air where needed. Technicians working on compatible heaters will find the kit straightforward to install and use.

Replaces worn or missing defrost components

This kit replaces damaged or lost ducting on heaters matching manufacturer model numbers H‑503012 and H‑803012. The upgrade is worth it when airflow has become restricted or when original flexible hose sections have cracked, restoring proper defrost performance without replacing the entire heater assembly.

Check heater model and duct dimensions before

Verify that your heater carries model number H‑503012 or H‑803012 and that the Grainger part numbers 45EC03, 45EC04, 45EC07 or 45EC078 apply to your unit. Confirm the 2‑in hose diameter and 10‑in duct length match the existing installation so the kit fits without modification.

Highlights

  • Defrosts vehicle heaters quickly with included 2 in flex hose
  • Connects directly to H-503012 and H-803012 heater models
  • Fits Grainger part numbers 45EC03, 45EC04, 45EC07, 45EC078
  • Transparent duct allows visual airflow inspection
  • Ready-to-install kit includes 10 in flux duct section

Specifications

BrandMARADYNE
TypeAutomotive Service & Shop Tools
ColorTransparent

Questions about this item

What heater models does the 2 in x 10 in flex duct connect to?

The kit fits Maradyne heaters H-503012 and H-803012, plus Grainger parts 45EC03, 45EC04, 45EC07 and 45EC078.

Which step is most often missed when fitting the flux duct to the heater outlet?

Push the duct fully over the 2 in outlet until it seats against the flange, then secure the supplied clamp — a loose clamp lets hot air bypass the windshield.

How often should the transparent flux duct be inspected or replaced?

Check the duct each season for cracks, UV haze or crushed sections; replace it if the wall turns brittle or no longer seals to the 2 in outlet.

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