What Modular Metal Fabricators does

Modular Metal Fabricators, Inc. (MMF Inc.) is a US-based manufacturer of HVAC sheet metal products and ductwork components, founded in 1970 and headquartered at 24600 Nandina Avenue in Moreno Valley, California. The company operates a single manufacturing facility producing a catalog of more than 40 product families spanning ductwork fittings and accessories, including tee wyes, flexible air duct (R-4.2, R-6, R-8), spiral pipe, 45° and 90° adjustable elbows, plenums and sleeves, ceiling and floor boxes, attenuators (Krueger and Titus), dampers, filter bases, flashings, and a range of specialty vent products. Manufacturing capabilities span spiral pipe production, adjustable elbow assembly (two, three, and four-gore configurations), tee wye fabrication with or without crimp, and flexible duct production in multiple thermal ratings, with custom engineering offered as a value-added service.

The company serves HVAC professionals, contractors, and sheet metal fabricators in the heating, cooling, and ventilation industries across the western United States. Revenue is generated through hardware sales rather than subscription or licensing models, with pricing handled via a quote-based system rather than public list pricing. The go-to-market is an indirect, channel-driven model: MMF products are distributed through an authorized distributor/reseller network whose primary stocking zone covers Arizona, California, and Nevada, with additional coverage in Washington, Montana, Oregon, Idaho, Wyoming, Utah, Colorado, New Mexico, and Texas.

In October 2024, MMF was acquired by Smiths Group, a UK-based diversified engineering company publicly listed on the London Stock Exchange. The transaction preserved MMF's brand, management, and Moreno Valley operations while bringing the business under a larger corporate parent. Trade association memberships with HARDI and ADI underscore ongoing channel relationships with HVAC wholesalers and distributors.

Name

Modular Metal Fabricators

Legal name

Modular Metal Fabricators, Inc.

Website

https://mmfinc.us

Company type

Private

Founded year

1970

Operating status

Operating

Headcount range

1–10 employees

Short description

Modular Metal Fabricators (MMF Inc.) is a US HVAC sheet metal fabricator founded in 1970 in Moreno Valley, California, producing ductwork fittings, spiral pipe, flexible duct, elbows, and accessories through an authorized distributor network serving HVAC contractors and fabricators across the western United States.

Ownership category

akta.pro rank

Product category

HVAC Sheet Metal Fabrication

NAICS

All Other Fabricated Metal Product Manufacturing (33299)

SIC

Sheet Metal Work (3444)

akta.pro primary industry

Sheet Metal & Ductwork Contracting (IMAFALAH)

akta.pro secondary industry

HVAC & Refrigeration Contracting (IMAFALAB)

Keywords

• HVAC sheet metal fabrication
• Ductwork fittings manufacturing
• HVAC duct components
• Galvanized duct fabrication
• Custom sheet metal ductwork

Headquarters

HQ city

Las Vegas

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Supply Chain, Infrastructure, Marketing or Sales

Revenue model

1. HVAC Sheet Metal Products: Manufactures and sells precision sheet metal fabrication products including ductwork, fittings, and air distribution components for HVAC systems. Products sold through distributor network to contractors and fabricators across the western United States.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels1 record

Core offering

Modular Metal Fabricators (MMF Inc.) manufactures and sells precision-crafted sheet metal HVAC ductwork components and fittings — including tee wyes, elbows, spiral pipe, plenums, sleeves, flexible duct, boxes, dampers, collars, connectors, flashings, and vent products — built to customer specifications at its Moreno Valley, California facility. Products are distributed through an authorized distributor network across the western United States to HVAC contractors and sheet metal fabricators.

Product overview

Modular Metal Fabricators (MMF Inc.) is a manufacturer of HVAC sheet metal products and ductwork components, operating as a single unified product portfolio rather than a platform-plus-modules architecture. The company's product line centers on ductwork fittings and accessories including: Tee Wyes and Tees Wyes for branching duct runs; Flexible Air Duct (R-4.2, R-6, R-8) and Bare Aluminum Flex Duct for flexible ductwork; Spiral Pipe, Pipes (conductor, snaplock, buttonlock), and Riser Pipe for straight duct sections; 45° and 90° Adjustable Elbows, Spotwelded Segmented Elbows, and 1-1/2 Times Radius Elbows for directional changes; Plenums and Sleeves for air distribution boxes; Square Ceiling Box, Floor Box, Boxes (register, side inlet, soffit, C-box) for outlet installations; Caps (round end, riser/perimeter), Collars and Connectors (universal, start, duct, superseal), Dampers, and Filter Bases for system assembly; plus specialized products including Attentuators (Krueger/Titus), Boots, Flashings, Hardware Cloth, Leader Heads, Line-Set Covers, Linear Products, Perforated Diffusers, Saddle Taps, Scuppers, Spin-Ins, Tapers, Tee-Top Vents, Transitions, Vent Products (foundation vents, wall caps, dryer vents), Air Cans, Cushion-Heads, Drain Pans, and Duct Strap Hangers. All products are manufactured at the Moreno Valley, California facility and distributed across the western United States.

Differentiator

Problem solved

Functional benefit

Products and services

• Tee Wyes Wye fittings for HVAC duct systems, available in sealed and unsealed versions with bead on all three sides. Available in sizes 5" through 36" in various gauges (30 GA to 22 GA), and available without crimp or undersized at no additional charge. Sold through distributors to HVAC contractors and fabricators.
• Flexible Air Duct Insulated flexible air duct available in R-4.2, R-6, and R-8 thermal ratings with silver jacket. Features polyester/wire helix core, fiberglass mesh scrim, and fiberglass insulation. Available in 6-foot and 25-foot lengths. Designed for HVAC air distribution systems.
• Plenums and Sleeves Galvanized plenums and sleeves for HVAC systems, priced per girth inch. Available in KD or assembled configurations with flange, S&D, raw, or plaster ground options. Gauges available: 28, 26, 24, 22.
• Spiral Pipe Galvanized spiral pipe available in 26, 24, and 22 gauge. Offered in 10-foot and 7-1/2" lengths, available in bare or circle lined configurations. Sizes range from 4" to 42".
• 45° Adjustable Elbows Adjustable 45-degree elbows for ductwork. Two gore assembly for 3"-20" sizes, three gore assembly for 22" and above. Standard with crimp one end, raw other.
• 90° Adjustable Elbows Adjustable 90-degree elbows for ductwork. Four gore elbows for 3"-20" sizes. Available in various packaging configurations including carton and straight pack. Gauges 30 GA to 22 GA.
• Square Ceiling Box 30 gauge square ceiling boxes manufactured from prime galvanized steel. Available in raw or plaster ground configurations. Custom sizes available upon request.
• Floor Box Floor boxes for HVAC applications, available with raw or plaster ground configurations. Multiple size options from 6" to 30".
• Bare Aluminum Flex Duct Bare aluminum flex duct available in 6-foot and 10-foot lengths. Available with raw ends, collar one end, or collar both ends configurations.
• Attenuators (Sound Attenuators) Sound attenuators for HVAC systems including Krueger and Titus single duct and double duct models. Per manufacturer specifications with 1" liner and 24 gauge construction.
• Air Cans Air cans including combustion air cans (round and rectangular), return air cans with or without collar, and square to round transitions for HVAC systems.
• Dampers (Damper Discs with Jiffy Hardware) Damper discs with jiffy hardware including bearings, handle, washers, and wing nuts. Available in sizes 5" through 26" in various gauges.
• Drain Pan One-piece folded drain pans with solder-free design. Features 3/4" PVC female fitting with rubber gaskets and inside hem for durability. 28 to 26 gauge construction.
• Line-Set Covers Line-set covers for protecting HVAC refrigerant lines.
• Perforated Diffusers Perforated diffusers with molded fiberglass back for HVAC air distribution.
• HVAC Boxes (Floor, Register, Side Inlet Ceiling, Soffit, C-Box) HVAC boxes including floor boxes, register boxes, side inlet ceiling boxes, soffit boxes, and C-boxes for various ductwork configurations.
• Collars and Connectors Duct connectors and collars including universal connectors, start collars, duct connectors, superseal start collars, and duct board start collars for flex and spiral duct systems.
• Flashings (Vent Flashings) Vent flashings including rotary vent flashing, cooler flashing (flat and pitched), and conductor flashing for roofing applications.
• Spin-Ins Spin-in fittings including duct board spin-ins and sheet metal spin-ins for flexible duct connections.
• Transitions Duct transitions including square to square adapters, round neck adapters, and square to round transitions for connecting different duct sizes and shapes.
• Vent Products Vent products including foundation vents (stamped and stucco), eyebrow/wall caps, and various dryer vents (Sproul, Bliss, and standard with damper).
• Boots (Duct Boots) Duct boots including cone boots, perimeter adapters, perimeter extensions, perimeter cone boots, perimeter stackhead boots, perimeter straight boots, and straight boots for HVAC applications.
• Caps (End Caps) End caps for ductwork including round end caps and riser/perimeter end caps. Available in 30, 28, 26, and 24 gauge.
• Cushion-Heads Cushion heads for HVAC systems available in 28 gauge to 22 gauge with optional 16 gauge earthquake straps. Available in bare or 1" liner configurations with standard 3" height above collar size.
• Filter Bases Filter bases for HVAC systems including 1" and 2" ADP filter bases. Available with various dimension specifications.
• Duct Strap Hangers Galvanized hanger straps for duct installation. Available in 26 and 24 gauge in 1-1/2" widths with 80' and 100' lengths. Available with or without pre-punched holes.
• Saddle Taps Saddle taps for ductwork connections including rectangular, 45-degree, and 90-degree configurations.
• Tees Wyes (Tee/Wye Branching Fittings) Tee and wye fittings including tee-wye circle lined, true tee, vent/reverse tees and wyes, and wye branches for ductwork branching.
• Tapers (Duct Tapers and Reducers) Duct tapers including pancake tapers, non-stock 12" high tapers with bead, 8" high tapers, and three piece reducers/increasers.
• Tee-Top Vents Tee-top vents including china caps, starter jacks, and bases in galvanized, bonderized, and dead-soft aluminum finishes.
• Pipes (Spiral, Conductor, Snaplock/Buttonlock, Vent Hangers) Various pipe products including spiral pipe, conductor pipe, 1" circle lined assembled pipe, snaplock/buttonlock pipe (KD), and vent pipe hangers.
• Riser Pipe Riser pipes including assembled and KD configurations, along with riser elbows for multi-story building applications.
• Sleeves (Round Sleeves with Dampers) Round sleeves with dampers for HVAC ductwork installation.
• Scupper Scupper components for HVAC drainage applications.
• Scupper Splitter / Overflow Scupper splitter and overflow components for HVAC systems.
• Linear Products Linear installation products including standing S, drives, S' lock, plaster ground frames, and plaster ground for HVAC ductwork installation.
• Hardware Cloth Galvanized hardware cloth for HVAC applications.
• Leader Heads Leader heads for downspout and drainage applications.

Segments3 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Scale indicators2 records

Recent moves5 records

Expansion highlights4 records

Direct peers

• AccuDuct Manufacturing: Regional HVAC sheet metal fabricator producing ductwork fittings and accessories; directly comparable in product line, customer base, and fabrication-shop business model.
• Sheet Metal Connectors, Inc. Manufacturer of HVAC sheet metal ductwork components including fittings, plenums, and accessories — directly comparable product line, customer base (HVAC contractors and distributors), and regional fabrication model to MMF.
• Linx Industries: HVAC sheet metal fabricator and ductwork component manufacturer serving western US distributors and contractors; comparable regional player with overlapping product portfolio.
• Ductmate Industries, Inc. Manufacturer of HVAC ductwork connection systems, fittings, and accessories; directly comparable product category and serves the same HVAC contractor and distributor channels as MMF.
• McGill AirFlow LLC: Manufacturer of commercial HVAC ductwork, fittings, and specialty sheet metal products; directly comparable in product offering (ductwork components) and contractor-focused customer base.

Broad incumbents

• Mestek, Inc. Diversified HVAC equipment and sheet metal product manufacturer with broad portfolio including coils, dampers, and ductwork components; larger incumbent overlapping with MMF's HVAC ductwork product line.
• Greenheck Group: Largest US manufacturer of commercial ventilation equipment including dampers, louvers, fans, and related HVAC sheet metal products; broad incumbent with overlapping ductwork category.
• Ruskin Company: Established manufacturer of HVAC dampers, louvers, and air control products including sheet metal fabrications; comparable in product category though larger and more diversified.
• SEMCO LLC: Manufacturer of commercial HVAC products including energy recovery ventilators and ductwork components; broader portfolio player in adjacent HVAC sheet metal category.

Emerging players

• Engel Industries: HVAC coil manufacturing and sheet metal fabrication company; partial overlap with MMF in HVAC sheet metal components though focused more on coil-line equipment.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/modular-metal-fabricators

Revenue estimate

Valuation estimate

Number of profiles

Profiles14 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Modular Metal Fabricators