AMFCO filter

Amfco Filter

This page lists all 219 Amfco Filter replacement filters available from Metal Air Filters — precision-manufactured washable aluminum mesh filters engineered as direct OEM replacements for Carrier commercial HVAC equipment. All filters on this page are HF Series products manufactured by American Metal Filter Company (AMFCO) with .030" extruded aluminum alloy frames, corrugated aluminum mesh media, UL 900 Class 1 certification, and a 275°F maximum operating temperature rating.

Each filter is a permanent washable replacement — clean and reuse for 5–10 years rather than replacing disposable filters every 30–90 days. AMFCO’s aluminum mesh construction provides 43% average dust arrestance per ASHRAE 52.1, making these filters ideal pre-filters in multi-stage Carrier commercial HVAC systems protecting downstream MERV 8 through HEPA filtration stages in rooftop units, air handlers, and split systems.

Commercial & Industrial Applications

Carrier commercial HVAC equipment is deployed across a wide range of commercial, institutional, and industrial building types. The following applications represent the primary use cases for Amfco Filter permanent washable aluminum mesh filters.

The HFA102025 20x25x1 MERV 4 foam air filter delivers reliable particulate filtration across residential, commercial, and light industrial environments where permanent washable filtration is preferred over disposable media replacement. The two-stage aluminum mesh and foam construction, 250°F temperature rating, low air resistance, and all-aluminum corrosion resistance make this filter suitable for a broad range of HVAC applications where MERV 4 efficiency, washability, and long service life are required.

General HVAC Filtration — Residential and Light Commercial

Standard residential and light commercial HVAC systems benefit from the HFA102025’s combination of MERV 4 particulate efficiency, low static pressure drop, and permanent washable construction. Installed in standard 20x25x1 nominal filter positions in residential air handlers, heat pumps, package units, and light commercial rooftop systems, the HFA102025 captures household dust, pet dander, pollen, lint, and larger airborne particulate at 75% or 85.4% arrestance efficiency (depending on depth) while maintaining the low resistance that residential blower motors require for energy efficiency and airflow balance. The permanent design eliminates monthly or quarterly filter replacement costs that accumulate over years of HVAC operation—washing the HFA102025 with warm water restores full filtration performance without replacement media expense. Buildings with occupants who prefer a maintenance-focused approach to HVAC filtration rather than disposable filter replacement programs find the HF Series foam filter an economical long-term alternative to monthly throwaway filters.

Electronics Cooling and Computer Room Applications

Electronic equipment cooling systems, server rooms, computer labs, and data processing facilities often use forced-air cooling with HVAC-style panel filters to capture dust that can accumulate on circuit boards, heat sinks, and cooling fans over time. Dust accumulation on electronics causes thermal resistance that leads to overheating, premature component failure, and data loss in critical systems. The HFA102025’s HF Series foam filter design is explicitly recognized by AMFCO as suited for “computers and electronic equipment requiring dust particle filtration” and “low airflow HVAC applications.” The low static pressure drop maintains cooling airflow volume essential for electronics thermal management, and the mechanical particulate capture mechanism requires no adhesive (adhesive-coated filters are not recommended for the HF Series). The washable and reusable washable foam air filter design simplifies filter maintenance in data center environments where filter replacement logistics create operational burden. Installed in standard 20x25x1 nominal positions in computer room air conditioning (CRAC) units, precision cooling units, or supplemental cooling systems, the HFA102025 provides effective long-term dust protection without the recurring cost of disposable filter replacement programs.

Commercial Air Handlers and Mechanical Rooms

Commercial HVAC systems in office buildings, retail facilities, healthcare outpatient spaces, and institutional buildings use standard-sized panel filters as pre-filters or primary filtration in air handling units. The HFA102025 installs in standard 20x25x1 nominal filter banks in air handling unit filter sections, providing MERV 4 primary filtration that captures visible dust, lint, and larger particulate before it can load downstream coils, fan blades, and ductwork. Commercial building operators who prefer permanent washable filters over disposable media programs find the HFA102025 provides a consistent MERV 4 filtration solution with no recurring replacement media cost—quarterly filter inspection and washing when loaded restores full performance. The 250°F temperature rating accommodates commercial air handlers that supply heated air to building spaces, and the all-aluminum construction maintains dimensional accuracy and corrosion resistance through years of commercial service with frequent washing cycles.

Light Industrial and Process Ventilation

Light industrial facilities with general manufacturing ventilation, assembly area air quality control, machinery cooling ventilation, and clean room pre-filtration applications benefit from the HFA102025’s combination of washable construction, mechanical particulate capture, and resistance to industrial cleaning procedures. AMFCO lists “machinery ventilation foam air filter” and “air cleaners requiring a permanent MERV 4 dust filtration foam filter solution” as primary HF Series applications. The HFA102025’s aluminum construction resists corrosion from elevated humidity in industrial environments, and the washable foam and mesh design handles the frequent cleaning cycles required by high-particulate industrial operations. Unlike adhesive-coated metal filters that lose effectiveness after each cleaning and require recoating, the HFA102025 foam media restores full mechanical capture efficiency with each warm-water rinse without any re-treatment. The 250°F temperature rating accommodates heat-generating industrial processes where inlet air temperatures exceed residential HVAC ranges.

Frequently Asked Questions

How does the HFA102025 two-stage foam air filter work?

Stage 1 aluminum mesh (expanded aluminum grid + corrugated screen wire criss-cross) captures large particles. Stage 2 25 ppi open-cell polyurethane foam captures smaller particles. Progressive density design extends wash intervals by keeping coarse dust out of the foam stage. MERV 4 rated at 300 fpm.

How do I clean the HFA102025?

Rinse with a moderate-to-heavy stream of warm water from the clean side through to the dirty side until water runs clear. High-powered steam cleaning and chemical dips are not recommended. Air dry before reinstalling. Do NOT apply adhesive coating — specifically not advisable for HF Series foam filters.

Can I coat the HFA102025 with adhesive?

No. AMFCO explicitly states that coating the HF Series filter with any adhesive is not advisable. The two-stage foam and aluminum mesh construction provides effective mechanical particulate capture without adhesive. Adhesive can clog the 25 ppi foam cell structure and impede subsequent washing.

Can the HFA102025 be exposed to sunlight or UV light?

No. DO NOT place the filter in direct sunlight or UV light. UV radiation degrades the polyurethane foam media over time. Store and install away from UV sources including direct sunlight through windows, skylights, and outdoor UV exposure.

What is the maximum operating temperature of the HFA102025?

The HFA102025 HFA model is rated for 250°F continuous operation. This covers most commercial and residential HVAC applications. The HM Series mist eliminators handle higher temperatures (HMA 275°F, HMG 325°F, HMS 900°F) but are moisture separators, not dust filters.

What are the actual dimensions of the HFA102025?

Actual dimensions: 19.5″ H × 24.5″ W × 7/8″ D (±1/8″ H&W, ±1/16″ depth). Nominal size: 20x25x1. HF Series uses 1/2″ undercut on height and width — actual H = nominal H minus 1/2″, actual W = nominal W minus 1/2″.

Can the HFA102025 be installed vertically or horizontally?

Yes — the HFA102025 may be installed vertically or horizontally without any orientation restriction. Unlike HM Series moisture separators that require TOP label facing upward, the HF Series foam filter delivers full MERV 4 filtration performance in either mounting orientation.

What is the MERV rating and dust arrestance of the HFA102025?

MERV 4. Dust arrestance: 75% at rated airflow (300 fpm), 24 grams per square foot. The MERV 4 rating covers general residential HVAC, commercial air handlers, electronics cooling, machinery ventilation, and air cleaner applications requiring greater arrestance than all-metal washable filters.

How often should I wash the HFA102025?

Wash frequency depends on application and particulate loading. General HVAC: every 1–3 months. Electronics/computer room cooling: every 3–6 months. Industrial/machinery ventilation: monthly or as needed. Visual inspection of the aluminum mesh face is the most reliable indicator — wash when visibly loaded or when system airflow decreases.

How does the HF Series foam filter compare to HM Series mist eliminators?

Different products for different applications. HF Series (HFA) is MERV 4 foam and aluminum mesh for dust and particulate filtration at 300 fpm with low resistance suitable for electronics. HM Series (HMA/HMG/HMS) are impingement moisture separators for water droplet and oil mist capture at 500 fpm. Do not substitute one for the other.