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Sub-Zero Air Purification Cartridge 7042798, 7007067
Sub-Zero

Sub-Zero 7042798 Refrigerator Air Filter | Air Purification Cartridge | Replaces 7007067

$38.20 - $191.00
MPN:
7042798
Condition:
New
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⚠️ Check Two Things Before Ordering: (1) This is the air filter that sits inside the refrigerator cabinet — it does not filter your water or ice. The Sub-Zero water filter is part 4204490, and the UC-15 undercounter ice maker filter is 7012333 / 7042803. (2) Only Sub-Zero models built with the Air Purification System accept this filter, and the system cannot be retrofitted. Designer drawer models ID-30R and ID-36R do not have it — only ID-30RP and ID-36RP do.
7007067 and 7042798 Are the Same Filter: Sub-Zero superseded part number 7007067 with 7042798. The filter is physically and functionally identical — same housing fit, same carbon media, same 12-month life. If the label inside your refrigerator or your old filter reads 7007067, this listing is your correct replacement.

Product Description

This is the genuine Sub-Zero 7042798 refrigerator air filter, the replaceable cartridge at the heart of Sub-Zero's Air Purification System. It fits Classic Series (BI), Designer Series (IT, IC, and ID-RP drawers), and PRO 3650 / PRO 4850 refrigerators.

Every Sub-Zero fitted with the Air Purification System pulls the cabinet air through this filter roughly every 20 minutes. The activated carbon media traps ethylene gas — the ripening agent given off by fruit and vegetables — along with the strong-smelling compounds released by onions, garlic, fish, and aged cheese. The result is produce that stays crisp longer and a refrigerator where last night's leftovers don't end up flavouring this morning's berries.

The carbon in the media saturates over time. Once it is full, air still circulates but nothing is being captured, which is why Sub-Zero specifies annual replacement and why most owners notice odours creeping back before they notice the reminder light. A fresh filter restores the system to full effect in about ten seconds — it snaps into its housing by hand, with no tools, no shut-off, and no water line to disconnect.

Key Features

  • Fits every Sub-Zero with the Air Purification System: One filter part covers the entire range — Classic BI, Designer IT/IC, ID-30RP and ID-36RP drawers, and PRO 3650 / PRO 4850
  • Ethylene gas capture: Absorbs the ethylene released by ripening produce, the main reason fruit and vegetables soften early in a sealed compartment
  • Stops odour transfer: Traps the airborne compounds from onions, garlic, fish, and cheese before they settle into butter, milk, and fresh produce
  • Air scrubbed every 20 minutes: The system recirculates the full cabinet volume through the filter on a continuous cycle
  • Based on NASA-developed technology: Sub-Zero's Air Purification System is derived from air-scrubbing technology originally developed for spaceflight
  • 12-month service life: Matches Sub-Zero's recommended annual replacement interval and the control panel reminder cycle
  • Genuine Sub-Zero part: Factory part number 7042798, manufactured to Sub-Zero specification — correct media density and housing fit
  • Tool-free snap-in fit: Replaces by hand in seconds, with no need to power down the refrigerator
  • Dimensions: 3.43" W x 4.61" H x 2.17" D, black finish

Compatible Sub-Zero Models

The 7042798 air filter fits the models listed below. All Sub-Zero refrigerators equipped with the Air Purification System use this same filter, regardless of series or size. If your model is not listed, check your Use & Care Guide for an air filter housing inside the fresh food compartment before ordering.

Classic Series (BI Prefix)

BI-30UGBI-36R/SBI-36RG/SBI-36S/SBI-36U/SBI-36UFD/OBI-36UFDIDBI-36UIDBI-42SBI-42SDBI-42SIDBI-42UFDBI-42UFDIDBI-48SBI-48SDBI-48SID

Designer Series — Over-and-Under (IT Prefix)

IT-30CIIT-30CIIDIT-30RIT-30RIDIT-36CIIT-36CIIDIT-36RIT-36RID

Designer Series — Column & Integrated (IC, ID Prefix)

IC-24RIC-30RIC-36RIC-36RIDID-30RPID-36RP

PRO Series

PRO3650PRO4850

Alternate Part Numbers

7042798, 7007067, 7007076

How to Replace Your Sub-Zero Air Filter

  1. Wipe the new filter first: A light dusting of carbon may transfer to the outside of the cartridge during shipping. Wipe it off with a paper towel — this is normal and has no effect on performance
  2. Find the filter housing: On most Classic Series (BI) refrigerators it is mounted high inside the fresh food compartment. On Designer Series models it typically sits toward the rear of the compartment. Your Use & Care Guide shows the exact position for your model
  3. Release the old filter: Press the tab or pull the cartridge straight out of its housing. No tools are needed and the refrigerator does not need to be switched off
  4. Snap in the new filter: Line the 7042798 up with the housing and push until it clicks into place
  5. Reset the reminder: Clear the air filter reminder on the control panel so the 12-month countdown restarts. The reset procedure varies by model — your Use & Care Guide lists the button sequence

When to Replace

Situation What to Do
Every 12 months Sub-Zero's standard replacement interval — replace even if the filter looks clean, since carbon saturation is not visible
Reminder light or icon appears The 12-month timer has elapsed. Replace and reset the indicator
Odours returning between cleans A strong sign the carbon is saturated. Replace ahead of schedule
Produce softening faster than usual Ethylene is no longer being absorbed. Replace the filter
After the refrigerator has been switched off for a long period Fit a fresh filter when bringing the unit back into service

Frequently Asked Questions

Is the 7042798 an air filter or a water filter?

It is an air filter. It sits inside the refrigerator compartment and cleans the circulating air — it has no connection to the water line and does not affect drinking water or ice. Sub-Zero refrigerators that dispense water use a separate water filter, part 4204490, mounted behind the kick grille at the base of the unit. Most Sub-Zero owners replace both once a year.

What is the difference between 7042798 and 7007067?

Nothing — they are the same filter under two part numbers. Sub-Zero replaced 7007067 with 7042798. Dimensions, media, housing fit, and service life are unchanged, so a refrigerator originally supplied with 7007067 takes the 7042798 without modification.

How do I know if my Sub-Zero has an air purification system?

Open the fresh food compartment and look for a small black cartridge in a moulded housing, usually high on a side wall or toward the rear. If you find one, this is the filter it takes. Classic Series (BI), Designer Series (IT, IC, ID-30RP, ID-36RP), and PRO 3650 / PRO 4850 models were built with the system. The ID-30R and ID-36R drawer models were not.

Can the air purification system be added to a Sub-Zero that did not come with it?

No. The housing, ductwork, and control logic are built into the cabinet at the factory and there is no retrofit kit. If your refrigerator has no filter housing inside the compartment, this cartridge will not apply to your appliance.

Why is there black dust on the outside of the filter?

Fine carbon can work its way out of the media and settle on the exterior during transit. It is cosmetic only. Wipe it away with a dry paper towel before fitting.

What happens if I leave the filter in longer than 12 months?

The refrigerator keeps running normally and the fan keeps circulating air, but once the carbon is saturated nothing further is absorbed. Ethylene builds up, produce ripens at its natural pace, and food odours begin to move between compartments — usually the first thing owners notice.

How does the Sub-Zero air purification system work?

A fan draws cabinet air through the carbon cartridge roughly every 20 minutes. The media holds onto ethylene gas and odour-carrying compounds, and the cleaned air returns to the compartment. Because the cycle runs continuously, the system works against odour and premature ripening around the clock rather than only when the door is opened.

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