What Air Systems Engineering does

Air Systems Engineering, Inc. (ASEI) is a commercial HVAC contractor founded in 1973 and headquartered at 3602 S Pine St, Tacoma, Washington. The company provides design-build construction, installation, and ongoing service & maintenance of commercial heating, ventilation, and air conditioning systems for customers across the greater Puget Sound and western Washington region. Its technical capabilities span variable refrigerant flow (VRF) systems, energy recovery ventilators (ERVs), custom sheet metal ductwork (galvanized, stainless, aluminum, black iron), and controls engineering, supported by an in-house 14,500 sq ft fabrication shop with plasma, brake, and welding equipment.

ASEI operates as a wholly-owned subsidiary of Comfort Systems USA (NYSE: FIX) following a 2007 acquisition, with no outside venture capital or independent investors. Revenue is generated through two primary streams: project-based HVAC construction services (new construction, tenant improvements, system upgrades) and recurring service & maintenance contracts (planned maintenance programs, 24/7 emergency repair, annual reports). Pricing is quote-based and project-specific with no public disclosure.

The company serves a horizontally diversified commercial customer base including education, government, healthcare, industrial (including semiconductor and microchip facilities), lodging & entertainment, multi-family & mixed-use, office, religious & nonprofit, and retail & restaurant segments. Notable project references include the Tacoma Dome, SeaTac Airport Control Tower, and 7 Cedars Hotel & Casino. ASEI employs 105 people as of 2023, with 30% of staff having 10+ years of tenure, and operates OSHA-10/OSHA-30 certified field crews with formalized Safety Services offerings.

Name

Air Systems Engineering

Legal name

Air Systems Engineering, Inc.

Website

https://asei.ws

Company type

Private

Founded year

1973

Operating status

Operating

Headcount range

11–50 employees

Short description

Air Systems Engineering is a commercial HVAC design-build, service, and maintenance contractor serving education, healthcare, government, industrial, and lodging customers in the greater Puget Sound and western Washington region, operating as a subsidiary of Comfort Systems USA.

Ownership category

akta.pro rank

Product category

Commercial HVAC Services

NAICS

Plumbing, Heating, and Air-Conditioning Contractors (238220)

akta.pro primary industry

Ventilation System Installation (Exhaust Fans, ERV/HRV, Make-Up Air) (HSAOAGAI)

akta.pro secondary industry

Ventilation & Smoke Control Systems (Smoke Exhaust/Pressurization) (IMADANAI)

Keywords

• Commercial HVAC services
• Sheet metal fabrication
• HVAC design build
• Planned maintenance programs
• Mechanical contracting

Headquarters

HQ city

Tacoma

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Infrastructure, Technology or R&D, Marketing or Sales

Revenue model

1. HVAC Construction Services: Design-build and installation of commercial HVAC systems for new construction and tenant improvements. Revenue generated through project-based contracts for commercial buildings.
2. Service & Maintenance: Ongoing service contracts, planned maintenance programs, and 24/7 emergency repair services for commercial HVAC systems throughout western Washington.
3. Sheet Metal Fabrication: Custom fabrication and installation of ductwork for each project, including galvanized steel, stainless steel, aluminum, and black iron materials.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Air Systems Engineering (ASEI) is a commercial HVAC contractor that designs, fabricates, installs, and services mechanical building systems for commercial facilities across the greater Puget Sound region. The company delivers design-build HVAC construction (new construction, tenant improvements, system upgrades), ongoing service and 24/7 emergency maintenance, and in-house sheet metal fabrication through a 14,500 sq ft shop. Its work centers on VRF systems, energy recovery ventilators, ductwork, and building controls for sectors including education, government, healthcare, industrial, lodging, multi-family, office, retail, and religious/nonprofit facilities.

Product overview

Air Systems Engineering is a commercial HVAC (heating, ventilation, and air conditioning) services company offering a unified portfolio of construction, service, and safety solutions. The core offerings consist of Construction Services (new construction, tenant improvements, system upgrades), Service & Maintenance (24/7 emergency repairs, planned maintenance programs), and Safety Services (OSHA-certified workforce). Supporting these are Sheet Metal Fabrication (in-house 14,500 sq ft fabrication shop) and Design & Engineering capabilities. The company specializes in VRF systems, energy recovery ventilation, and serves sectors including education, government, healthcare, industrial, lodging, multi-family, office, and retail buildings throughout the greater Puget Sound region.

Differentiator

Problem solved

Functional benefit

Products and services

• Construction Services

Quantifiable outcome

• 50 tons of VRF installed, 19 air handlers with economizers, improved locker room ventilation with heat recovery, and new building controls
• +1 more outcomes

Named customers3 records

Segments11 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature2 records

Scale indicators3 records

Recent moves5 records

Expansion highlights4 records

Direct peers

• MacDonald-Miller Facility Solutions: Major Pacific Northwest-based mechanical and HVAC contractor offering design-build construction, service, and building automation across commercial and industrial markets. Directly comparable to ASEI in regional footprint, service portfolio, and customer mix in the Puget Sound region.
• Holaday-Parks: Seattle-based commercial mechanical contractor providing HVAC design, installation, and service. Comparable in regional focus, commercial project mix, and HVAC-centric offering, with similar customer concentration in education, healthcare, and government sectors.
• Hermanson Company: Pacific Northwest mechanical contractor providing HVAC, plumbing, and sheet metal fabrication for commercial construction. Directly comparable in service portfolio, fabrication capabilities, and regional market presence in the greater Seattle/Tacoma area.
• Limbach Holdings: Publicly traded (LMB) national mechanical contractor specializing in HVAC, plumbing, and building services for commercial and institutional customers. Comparable in design-build construction, service contracts, and technical complexity; provides public-market reference for the HVAC contracting business model.

Broad incumbents

• EMCOR Group: Large publicly traded facilities and mechanical construction services provider offering HVAC, electrical, and building services nationally. Comparable in commercial HVAC service offering but operates at significantly greater scale across multiple trades and geographies.
• Southland Industries: National mechanical contractor delivering design-build HVAC, plumbing, and fire protection for commercial and industrial projects. Comparable in integrated design-build approach and HVAC focus but with broader geographic footprint and larger project scale.
• ACCO Engineered Systems: Large Western US mechanical contractor providing HVAC, plumbing, and building automation services. Comparable in design-build commercial HVAC focus with in-house fabrication capabilities, though operating at greater scale across multiple western states.
• Comfort Systems USA: ASEI's publicly traded parent company (NYSE: FIX) operating a national network of mechanical contracting subsidiaries. Comparable as the umbrella entity that owns ASEI and shapes its capital allocation, M&A, and strategic direction; also serves as a public-market reference for the holding structure.
• APi Group: Publicly traded safety, specialty, and industrial services holding company with mechanical services exposure. Comparable as a public-market reference for mechanical contracting roll-ups and provides a benchmark for how CSUSA's ASEI subsidiary could be valued as part of a broader services platform.

Regional players

• University Mechanical Contractors: Pacific Northwest mechanical contractor based in Washington State providing HVAC, plumbing, and specialty contracting. Comparable in regional HVAC construction focus and institutional customer base, though serves a broader Pacific Northwest geography than ASEI's Puget Sound focus.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/ASEI2015
• LinkedInlinkedin.com/company/air-systems-engineering-inc-

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 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 Air Systems Engineering