What Kelso Industries does

Kelso Industries is a US-based, privately held platform company providing mechanical, electrical, plumbing, and adjacent building-system services (collectively branded MEP+) to commercial, industrial, and institutional customers. Founded in 2021 and headquartered in Phoenix with corporate offices in Draper, Utah, the company operates through a federation of 38+ wholly-owned operating subsidiaries across more than 20 states, including legacy brands such as Koch Mechanical (founded 1933), Wallace Electric (founded 1937), APG Electric (roots to 1915), and Advanced Heating & Cooling (founded 1961). The platform is owned by Salt Lake City-based sponsors Oxbow Equity Partners and Peterson Partners, with a $50 million growth investment closed in 2025 from Paceline Equity Partners to fund further acquisitions.

The core technology stack spans on-site MEP+ installation, 24/7 service and maintenance, retrofit projects, prefabrication and modular construction (supported in-house by the 150,000-square-foot FabLogix fabrication facility acquired in 2025), engineered solutions, and Building Automation & Controls with remote monitoring and real-time analytics. The company does not expose a software API or developer platform and does not disclose proprietary AI/ML systems; differentiation rests on physical-service execution, the depth of the operating-company portfolio, and shared engineering, fabrication, and procurement resources.

Kelso generates revenue through professional services (installation, retrofit, and emergency repair) combined with recurring customizable service agreements on multi-year contracts that bundle preventive maintenance, scheduled inspections, and 24/7 emergency response. Customer segments are evenly spread across Industrial (manufacturing and processing facilities), Commercial (offices, retail, mixed-use developments), and Institutional (schools, hospitals, and government buildings) end markets. Distribution is enterprise field sales executed through the local operating-company networks, with parent-level coordination for nationwide accounts.

Name

Kelso Industries

Legal name

Kelso Industries LLC

Website

https://kelso-industries.com

Company type

Private

Founded year

2021

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

Kelso Industries is a privately held, PE-backed platform of 38+ operating companies delivering mechanical, electrical, plumbing, HVAC, refrigeration, controls, and energy services to commercial, industrial, and institutional customers across 20+ US states.

Ownership category

akta.pro rank

Product category

Mechanical and Electrical Contracting Services

NAICS

Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance (811310), Commercial and Service Industry Machinery Manufacturing (333310)

SIC

Services-Facilities Support Management Services (8744), Refrigeration & Service Industry Machinery (3580), Misc Industrial & Commercial Machinery & Equipment (3590)

akta.pro primary industry

Critical Power & Backup Systems Maintenance (Generators, ATS, Batteries) (BPABACAF)

akta.pro secondary industries

Energy Services (Retrofits/Commissioning/Testing & Balancing) (IMAIABAI), Refrigeration & Cold-Chain Equipment Service (IMAIABAE), Emergency Breakdown & Rapid Response Maintenance Services (IMAIACAM)

Keywords

• Commercial HVAC services
• Mechanical electrical plumbing
• Building automation controls
• Facility maintenance services
• MEP contractor services

Headquarters

HQ city

Phoenix

HQ country

United States

HQ region

North America

Offices39 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. MEP+ Services: Comprehensive mechanical, electrical, plumbing, and HVAC services for commercial, industrial, and institutional clients. Includes installation, maintenance, repair, and emergency services with 24/7 availability.
2. Service Agreements: Customizable service contracts providing proactive maintenance, scheduled inspections, predictive maintenance, and emergency response guarantees.
3. Installation & Retrofit Projects: New installation projects and retrofit/upgrading of existing MEP+ systems including energy efficiency upgrades, system modernization, and custom solutions for specific facility challenges.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels7 records

Core offering

Kelso Industries is a nationwide MEP+ (Mechanical, Electrical, Plumbing, HVAC, Refrigeration, Controls & Building Automation, Energy Services) solutions partner operating as a roll-up platform of 31+ acquired service companies. The company delivers comprehensive installation, retrofit, 24/7 service and maintenance, prefabrication, modular construction, engineered solutions, industrial services, and energy-efficiency upgrades to commercial, industrial, and institutional facilities throughout the United States. Service is provided under customizable, often multi-year service agreements with round-the-clock emergency response guarantees.

Product overview

Kelso Industries is a nationwide MEP+ (Mechanical, Electrical, Plumbing, and beyond) solutions partner operating as a platform of 31+ acquired service companies. The company provides comprehensive installation, service, maintenance, and retrofit solutions across HVAC, refrigeration, controls & automation, plumbing, and electrical disciplines. The core offerings span service categories including Service & Maintenance (24/7 availability), Installation & Retrofit, Modular Solutions, Engineered Solutions, Industrial Services, Energy Savings & Efficiencies, and Prefabrication. The company maintains 31 acquired subsidiary brands (including Advanced Arizona, APG Electric, DHR Mechanical, FabLogix, Four Star Mechanical, Koch Mechanical, MJ Mechanical, Mullins Mechanical, NTD Mechanical, RJ Martin Electric, Wallace Electric, YES LLC, and ENETK LLC) that operate under their own brand identities while benefiting from shared resources, capital for tuck-in acquisitions, collective vendor buying power, and leadership development programs.

Differentiator

Problem solved

Functional benefit

Products and services

• MEP+ Services Comprehensive mechanical, electrical, plumbing, HVAC, refrigeration, controls & automation, and energy services for commercial, industrial, and institutional facilities across the United States, delivered through Kelso's network of 38+ operating companies.
• Mechanical Systems HVAC systems, boiler services, and refrigeration services covering installation, routine maintenance, and emergency repairs for commercial and institutional facilities.
• Electrical Services Installation and upgrades, preventive maintenance, and 24/7 emergency repairs for electrical systems, keeping facilities safe and operational for commercial, industrial, and institutional clients.
• Plumbing Services General plumbing repairs, preventive maintenance including backflow testing, and water heater services ensuring the integrity and functionality of plumbing systems for commercial, industrial, and institutional customers.
• Building Automation & Controls Integrated control systems managing HVAC, lighting, and security from a single platform, with energy management, real-time analytics, and remote monitoring/control capabilities for building owners and operators.
• Service & Maintenance Round-the-clock service availability with customizable service agreements for mechanical, electrical, and plumbing systems, providing proactive maintenance and timely repairs to commercial, industrial, and institutional clients.
• Installation & Retrofit Installation of MEP+ systems for new construction and retrofit projects, including energy-efficiency upgrades, system modernization, and integrated solutions tailored to specific facility challenges.
• Modular Solutions Off-site construction of modular components in controlled environments for scalability, flexibility, improved safety, and reduced on-site construction time on building projects.
• Engineered Solutions In-house engineering team providing customized solutions with tailored system design, innovative problem-solving, and seamless integration with existing infrastructure for complex facility challenges.
• Industrial Services Industrial HVAC, process piping, specialized electrical systems, industrial plumbing, and equipment maintenance and repair for industrial facilities, manufacturing plants, and processing operations.
• Energy Savings & Efficiencies Energy audits, high-efficiency equipment installation, sustainable practices including renewable energy systems, and ongoing optimization for long-term energy savings at commercial, industrial, and institutional facilities.
• Prefabrication Off-site assembly of MEP+ components in a controlled environment with enhanced quality control, reduced on-site time, and fewer trades required simultaneously, improving cost-efficiency and safety.

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

One partnership is on record.

• Wallace ElectriccoreStrategic or Co-development PartnerWallace Electric, a leading commercial electrical contractor headquartered in Jackson, Georgia, partnered with Kelso Industries. Wallace Electric provides comprehensive electrical services to commercial contractors in high-growth end markets throughout the Southeast. Anchor Peabody represented Wallace Electric in the transaction.

Scale indicators5 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Legence: PE-backed (BlackRock) MEP+ services platform formed via roll-up of engineering, energy, and construction firms. Highly comparable to Kelso in scope (MEP+), PE sponsorship, multi-billion revenue scale, and prefabrication/building automation offerings.
• Comfort Systems USA: Public national mechanical contracting platform built largely through acquisitions of HVAC and plumbing contractors. Closely mirrors Kelso's MEP+ service model, federated-brand strategy, and recurring service-agreement mix.
• Limbach Holdings: Public specialty MEP services contractor with building automation and HVAC focus. Comparable in service mix, customer segments (commercial/institutional), and project+service revenue model.
• IES Holdings: Public national provider of electrical and communications infrastructure services with HVAC/mechanical exposure. Comparable footprint and end-market mix to Kelso's electrical and mechanical operating companies.
• Shambaugh & Son: Large private mechanical contractor (PE-backed by Harbour Group) focused on commercial/industrial HVAC, plumbing, and process piping. Comparable private peer with similar regional+national growth trajectory.
• Service Logic: PE-backed HVAC and mechanical services platform formed via acquisition of regional contractors. Closely mirrors Kelso's roll-up strategy, recurring service model, and decentralized operating structure.
• Hill Mechanical Group: Private mechanical contracting and service firm focused on HVAC, plumbing, and controls for commercial/industrial customers. Comparable mid-size MEP services peer competing for similar institutional/industrial projects.

Broad incumbents

• EMCOR Group: Largest publicly traded U.S. mechanical and electrical construction/services company ($13B+ revenue). Directly comparable as a national MEP services incumbent against which Kelso's roll-up competes for multi-site enterprise accounts.
• APi Group: Public specialty services platform built via acquisition roll-up (life safety, specialty industrial, and adjacent services). Comparable as a PE-influenced services consolidator, though more diversified beyond MEP.
• ABM Industries: Public integrated facility services provider with mechanical/HVAC service lines serving commercial and industrial customers. Comparable as a broad-scope building services incumbent competing for facility-services contracts.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks1 record

Key highlights7 records

Customer concentration

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• Instagraminstagram.com/kelsoindustries

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Subsidiaries36 records

Funding overview

Funding rounds1 record

Investors1 record

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

M&A3 records

Investments

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

Frequently asked questions about Kelso Industries