What SEIHO does

SEIHO International, Inc. is a Pasadena, California-based manufacturer of contemporary HVAC air distribution equipment, established in 1986 as a wholly-owned subsidiary of SEIHO Kogyo, a Japanese air distribution and vent louver manufacturer with over 25 years of HVAC industry experience. The company designs and produces aluminum and stainless steel diffusers, nozzles, grilles, registers, vent caps, and dryer vents across roughly 30+ SKUs organized into seven product families (residential ceiling mini diffusers, SpotDiffusers, TurboNozzles, round grilles/dampers, volume adjustable grilles, vent caps, and dryer vents). Notable proprietary product lines include the TurboNozzle series (NT, NP, NTX, NX models) for high-velocity/reversible airflow and the SpotDiffuser series (PK variants) for targeted commercial air delivery, as well as 304 stainless steel exterior vent caps and dryer vents. Manufacturing is split between facilities in Los Angeles, USA and Tokyo, Japan, leveraging the parent company's Japanese production capabilities while serving the North American specification market.

The business operates a hardware sales model with unit-based pricing, where standard finishes (clear anodized aluminum) ship from in-stock inventory and custom powder-coating in any color is available at nominal charge. Go-to-market relies on an established network of manufacturers' representatives covering major cities across North America, Canada, and overseas markets, supplemented by direct purchasing via a "Where to Buy" locator on the company website. Specification-driven demand from architects, engineers, and design professionals is supported through downloadable Revit/BIM families, an interactive digital catalog, an extensive project gallery, and ongoing advertising in ASHRAE Journal and architectural trade publications. The customer base spans residential and commercial buildings, with commercial wins concentrated in prestigious, visible projects (e.g., Oculus WTC, Reagan Presidential Library, Natural History Museum of Los Angeles County, LINQ High Roller, Marriott Marquis, multiple luxury California apartment complexes). Headcount is reported at 1-10 employees in the US entity, consistent with a lean specification-brand subsidiary that draws production and back-office support from its Japanese parent.

Revenue mechanics are not publicly disclosed. No venture capital, institutional investment, M&A activity, or public listing has been identified, and the US subsidiary appears wholly financed and controlled by SEIHO Kogyo. Pricing is not published on the website, most orders are fulfilled from warehouse stock, and the company exhibits at AHR Expo (booth #1121 in Orlando 2025, booth #C2718 in Las Vegas 2026), indicating continued trade-channel investment.

Name

SEIHO

Legal name

SEIHO International, Inc.

Website

https://seiho.com

Company type

Private

Founded year

1986

Operating status

Operating

Headcount range

1–10 employees

Short description

SEIHO International, Inc. is a Pasadena, California-based subsidiary of Japanese HVAC manufacturer SEIHO Kogyo, designing and producing aluminum and stainless steel diffusers, nozzles, grilles, registers, and vent caps for residential and commercial building projects across North America.

Ownership category

akta.pro rank

Product category

HVAC Air Distribution Equipment

NAICS

Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing (333415)

SIC

Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585)

akta.pro primary industry

Ventilation, Ducting & Air Distribution Equipment (IMAHAKAG)

akta.pro secondary industry

Louvers, Vents & Architectural Grilles (IMADAIAM)

Keywords

• HVAC air distribution
• Aluminum diffusers
• Architectural grilles
• Vent caps manufacturing
• Dryer vents

Headquarters

HQ city

Pasadena

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Marketing or Sales, Personnel

Revenue model

1. HVAC Equipment Sales: Direct sales of diffusers, nozzles, grilles, registers, and vent caps to residential and commercial building projects through manufacturer representatives and specification channels
2. Custom/Powder Coated Products: Products can be powder coated to any color of choice as a customization option, adding value to standard product offerings

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels7 records

Core offering

SEIHO International, Inc. manufactures contemporary architectural designs of HVAC air distribution equipment including aluminum SpotDiffusers, TurboNozzle diffusers, double deflection Round Grilles, Volume Adjustable Grilles, aluminum and stainless steel Vent Caps, and Dryer Vents. Products are produced at state-of-the-art manufacturing facilities in Los Angeles, USA and Tokyo, Japan, and are specified for residential and commercial buildings, government facilities, museums, airports, hotels, and upscale retail projects.

Product overview

SEIHO International is a manufacturer of contemporary HVAC air distribution equipment including aluminum SpotDiffusers, TurboNozzle diffusers, double deflection Round Grilles, and aluminum/stainless steel Vent Caps and Dryer Vents. The product portfolio consists of multiple product categories: (1) Residential Ceiling MINI Diffusers (Models TT, TT-P, TX, TX-P), (2) Aluminum SpotDiffusers and variants (Models PK, PK-E, PKP, PK-AD/A, PK-R/RA, PK-K), (3) Aluminum TurboNozzles (Models NT, NP, NTX, NTX-R, NX, NX-P), (4) Round Grilles and Dampers (Models RHV, NR-B, EC, SXL, BS), (5) Volume Adjustable Grilles (Models JSP, JRC, JRA, DK-M3, DK-M), (6) Vent Caps (Models KX, KXU, SX, SFX, SXL, SX-S, SFX-S, CFX, CFX-P), and (7) Dryer Vents (Models SB-P, SFB-P, SB, SFB, SFZ, SFZC, RCA-S, RCC-S). Products are manufactured in facilities in Los Angeles, USA and Tokyo, Japan, serving both residential and commercial buildings.

Differentiator

Problem solved

Functional benefit

Products and services

• Aluminum SpotDiffusers (Models PK, PK-E, PK-AD, PK-A, PK-R, PK-RA, PK-K, PKP)

Named customers70 records

Segments2 records

Ideal customer profiles2 records

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Continental Industries: Continental Industries produces vent caps, dryer vents, registers, and grilles for residential and commercial HVAC. Direct overlap with SEIHO's vent-cap and dryer-vent product families and similar distribution channels through HVAC wholesalers.
• Metal Industries (Metal-Aire): Metal Industries / Metal-Aire produces architectural grilles, diffusers, and specialty air-distribution products for commercial and high-end residential applications. Closely comparable product portfolio and specification-channel sales motion.
• Price Industries: Price Industries is a major manufacturer of HVAC air-distribution products including grilles, diffusers, registers, and terminal units serving commercial, institutional, and architectural projects. Closely aligned premium-spec positioning and architectural focus.
• Hart & Cooley: Hart & Cooley produces registers, grilles, and diffusers for residential and light-commercial HVAC applications. Comparable in product mix (grilles, registers, specialty vents) with overlapping distribution through HVAC wholesalers and reps.
• Anemostat Products: Anemostat manufactures architectural air-distribution products including diffusers, grilles, and louvers for commercial buildings. Comparable architectural-grade positioning and overlap in commercial specification projects.
• Nailor Industries: Nailor manufactures architectural grilles, diffusers, registers, and dampers for commercial and institutional HVAC applications. Overlapping product catalog and target customer base of engineers, architects, and contractors.
• Titus (Atmus Filtration Technologies): Titus is one of the largest North American manufacturers of HVAC diffusers, grilles, terminal units, and air-distribution products for commercial buildings. Directly comparable product portfolio (architectural and commercial diffusers/grilles), overlapping customer base of engineers and architects, and competing for the same specification-channel business.
• Krueger (Atmus Filtration Technologies): Krueger manufactures commercial HVAC diffusers, grilles, terminal units, and air-distribution equipment with an emphasis on engineering-grade performance products. Competes for the same engineering-spec and commercial project business.

Emerging players

• In-O-Vate Technologies: In-O-Vate specializes in dryer-vent and through-the-wall exhaust products with a focus on high-performance, code-compliant designs. Overlaps with SEIHO's dryer-vent product line (RCA-S, RCC-S, CFX) and competes for residential and multifamily installations.

Broad incumbents

• Broan-NuTone: Broan-NuTone is a large established manufacturer of residential ventilation products including bath fans, range hoods, dryer vents, and grilles. Overlaps with SEIHO's exterior vent-cap and dryer-vent categories as part of a broader portfolio serving builders and remodelers.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/seiho-international-inc

Revenue estimate

Valuation estimate

Number of profiles

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 SEIHO