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Unifilter Model 99B

Key Specifications
  • Manufacturer: General Oil
  • Model Name: 99B
  • Part Number: 9302
  • Type: Oil Filter
  • Warranty (Years): 1 year except filter cartridge
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Maintenance

Annual Filter Replacement

Other Information

  • 25 GPH Firing Rate.
  • Working pressure = 40 PSI.
  • ETL Listed.
  • 3/8″ NPT Standard.
  • Durable Epoxy Coated Galvanized Steel Filter Bowl, inside and out.
  • 4EVERLoc Bottom Bolt Design.
Manufacturer
General Oil
Model Name
99B
Part Number
9302
Packaging
12/Pk420/Pallet
Filter
Yes
Maintenance
Annual Filter replacement
Type
Oil Filter
Warranty (Years)
1 year except filter cartridge

PARTS

Image Part Name Ref # GFI # Qty Req'd Price
101 Wool Felt Replacement Cartridge 101 Wool Felt Replacement Cartridge 9011 9011 9951 $11.24
101 Wool Felt Replacement Cartridge
101 Wool Felt Replacement Cartridge
GFI# 9011 Ref # 9011
$11.24 Qty Req'd: 9951

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Trust a Pro for Healthy Home Solutions

Whole-home installs and servicing should be handled by a certified contractor. Connect with a trusted professional near you to ensure long-lasting comfort, protection, and performance.

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Full History

1937
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Founded in Detroit

General is founded by Art and Grace Redner in Detroit, Michigan, marking the beginning of a family legacy.
1939
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Supporting the War Effort

General begins manufacturing filters for bomber ground support equipment during World War II.
1943

Expanding Operations

General moves to a new Detroit location at Schoolcraft and Grand River.
1946
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New Detroit Home

General relocates to 12890 Westwood Avenue in Detroit, strengthening operations in Michigan.
1948

Growth into Canada

Canadian General Filters Ltd. is founded, extending reach to North America.
1953

Relocation to Novi, Michigan

General Filters moved to its current location in Novi, Michigan, marking a major milestone in its evolution as a manufacturing company.
1958
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Model 250 Humidifier Introduced

The Model 250 set a new standard for whole-home comfort, helping families maintain healthy humidity and improve indoor air quality.
1962
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New Oil Filters Introduced

1969
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Model 1040 Humidifier Debuts

General Filters introduced the Model 1040 humidifier, a breakthrough product that helped define whole-house humidification.
1983
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AC 1 Air Cleaner Introduced

General Filters introduced the Model 1040 humidifier, a breakthrough product that helped define whole-house humidification.
1997
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Steam Humidifiers Introduced

The GeneralAire Model 5500 provides clean, sterile moisture with a furnace-independent design, disposable cylinder, digital diagnostics, and included humidistat.
2006
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Gar-Ber® Acquisition

Gar-Ber Spin-On residential fuel oil filters were acquired by General Filters and continue to be manufactured to the same trusted specifications.
2006
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Elite Humidifiers Introduced

2009
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Advanced TERSus Technology Introduced

2014
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Dehumidification Expansion

The acquisition of Air & Energy Products expanded the company’s whole-house dehumidifier offerings.
2018
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Advanced Air Solutions

Wi-Fi-enabled dehumidifiers were introduced under the GeneralAire® brand, and Second Wind™ Air Purifiers were acquired to expand UV air purification solutions.
2018
general-filters-timeline-2018-touch-screen

Touch Screen & Wi-Fi Control

GeneralAire DH75 and DH100 whole-house dehumidifiers (75-100 pints/day) feature LCD touch screens and Wi-Fi capability via the GeneralAire App for remote monitoring.
2019
general-filters-timeline-2019

Touch Screen & Wi-Fi Control

GeneralAire DH75 and DH100 whole-house dehumidifiers (75-100 pints/day) feature LCD touch screens and Wi-Fi capability via the GeneralAire App for remote monitoring.
2020
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Model 5500 Steam Humidifier Introduced

2020
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Brand Logo Refresh

New GeneralAire®, General Filters, and Canadian General Filters Brand Logos Introduced
2020
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Model 3200 Evaporative Humidifier Introduced

2020
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Model 4200 Evaporative Humidifier Introduced

2020
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Industry Standard Vapor Pad Lineup Introduced

2021
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BioGaskets Included in All Gar-Ber Oil Products

2021
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Introduced MERV 13 Filters

2023
general-filters-timeline-2023

Model 4400A Fan-Assist Evaporative Humidifier Introduced