Riddleberger Brothers

What Riddleberger Brothers does

Riddleberger Brothers, Inc. (RBI) is a Virginia-based mechanical contractor founded in 1940 and operating as a wholly-owned subsidiary of Comfort Systems USA (NYSE: FIX). The company delivers mechanical, electrical, and plumbing (MEP) construction services alongside a 24/7 service and maintenance operation, serving institutional, healthcare, educational, commercial, and industrial clients primarily across Virginia and the Shenandoah Valley. Headquartered in Mt. Crawford with an additional service office in Winchester, RBI employs between 101 and 250 people and runs a sales-led, project-based go-to-market in which it bids on construction projects and secures multi-year service contracts with anchor customers such as the University of Virginia, James Madison University, and UVA Health.

The company's technology stack is built around in-house engineering, project management, a prefabrication shop, Building Information Modeling (BIM) coordination, building automation controls, geothermal HVAC design, and XOi-based visual intelligence for field documentation. RBI monetizes through two primary streams: one-time project-based construction contracts and recurring service and maintenance agreements, with pricing quoted on a project-by-project basis. Its differentiators center on a 72+-year registered apprenticeship program, deep Virginia relationships, and a safety record that includes over 1 million safe work hours without a lost-time incident and 15 consecutive years of Virginia SHARP designation.

As a privately held subsidiary, RBI does not disclose revenue or headcount figures. Operating autonomy is preserved within the Comfort Systems USA portfolio, which provides purchasing scale, capital access, and brand credibility on large institutional bids. Strategic priorities evidenced in the data are workforce pipeline development (Massanutten Technical Center, Valley Career & Technical Center, veteran hiring) and safety/certification maintenance that pre-qualifies the firm for institutional and healthcare work; no material geographic expansion, acquisition activity, or proprietary technology investment is indicated.

Name

Riddleberger Brothers

Legal name

Riddleberger Brothers, Inc

Website

https://rbiva.com

Company type

Private

Founded year

1940

Operating status

Operating

Headcount range

101–250 employees

Short description

Riddleberger Brothers is a Virginia-based mechanical contractor founded in 1940 and owned by Comfort Systems USA, delivering MEP construction and 24/7 HVAC, plumbing, and service work to institutional, healthcare, educational, and commercial clients across the Shenandoah Valley.

Ownership category

akta.pro rank

Product category

Mechanical Contracting Services (HVAC, Plumbing, and Building Automation)

NAICS

Plumbing, Heating, and Air-Conditioning Contractors (23822), Plumbing, Heating, and Air-Conditioning Contractors (238220), Electrical Contractors and Other Wiring Installation Contractors (23821)

akta.pro primary industry

HVAC & Refrigeration Contracting (IMAFALAB)

akta.pro secondary industry

Plumbing & Pipefitting Contracting (IMAFALAC)

Keywords

• HVAC mechanical contracting
• Plumbing construction services
• Building automation controls
• HVAC service maintenance
• Mechanical piping systems

Headquarters

HQ city

Mount Crawford

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. Construction Services: Project-based mechanical, electrical, and plumbing construction services for new builds and renovations
2. Service & Maintenance: 24/7 service and repair services for existing mechanical systems

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Riddleberger Brothers is a full-service mechanical contractor providing design, installation, and maintenance of HVAC, plumbing, electrical, and building automation systems for institutional, commercial, healthcare, industrial, and educational facilities in Virginia. The company delivers project-based construction work, 24/7 service and repair operations, indoor air quality solutions, and energy-efficient systems such as geothermal heat pumps and building automation controls, supported by an in-house prefabrication shop.

Product overview

Riddleberger Brothers (RBI) is a mechanical contractor offering a unified portfolio of construction and service solutions. The core offering spans mechanical, electrical, and plumbing (MEP) construction services and 24/7 maintenance operations. Supporting services include Indoor Air Quality, Visual Intelligence (XOi-based field documentation), geothermal HVAC systems, and building automation controls. An in-house prefab shop enables efficient component fabrication. Projects range across institutional, commercial, healthcare, industrial, and educational sectors, with notable expertise in complex healthcare facilities like UVA Hospital and sustainable buildings featuring geothermal systems.

Differentiator

Problem solved

Functional benefit

Products and services

• Construction Services Full mechanical, electrical, and plumbing (MEP) construction services for institutional, commercial, healthcare, industrial, and educational projects, including new construction and renovation work. Customers include universities, hospitals, schools, water parks, and commercial facilities.
• Service & Maintenance 24/7 service, repair, and maintenance operations for mechanical and plumbing systems, providing prompt response and ongoing operational solutions for institutional, commercial, and healthcare customers.
• Indoor Air Quality Services Services focused on improving and maintaining indoor air quality for commercial and institutional facilities, supporting occupant comfort, energy efficiency, and code compliance.
• Visual Intelligence (XOi Field Documentation) Field technology platform for capturing visual documentation of service work, including before-and-after reporting and safety documentation, enabled through XOi technology used by RBI's service technicians.
• Geothermal HVAC Systems Design and installation of geothermal heat pump loops and heat pump equipment as part of energy-efficient building HVAC solutions, applied to schools, commercial, and institutional facilities.
• Building Automation Controls Building automation and control systems integration for maximizing HVAC efficiency and operational reliability in commercial and institutional buildings.
• Prefab Shop Services In-house fabrication and pre-construction manufacturing capabilities for mechanical and plumbing components, enabling quick response to customer needs and supporting RBI's construction and service operations.

Quantifiable outcome

• Surpassed 1,000,000 safe work hours without lost-time incident
• +2 more outcomes

Named customers7 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Nine partnerships are on record, tiered minor and core.

• Southern RefrigerationminorStrategic or Co-development Partner · 1 May 2026RBI partnered with Southern Refrigeration to coordinate supply of HVAC equipment for Valley Career & Technical Center students, supporting technical education and future careers in the skilled trades.
• Valley Career & Technical CentercoreStrategic or Co-development Partner · 1 February 2025RBI partners with Valley Career & Technical Center in Fishersville to supply HVAC equipment for students and support technical education programs. The partnership helps educate the next generation of skilled trades professionals.
• Trumbo ElectriccoreStrategic or Co-development Partner · 22 April 2019RBI and Trumbo Electric jointly support Massanutten Technical Center's Youth Apprenticeship Program, providing paid on-the-job training. Participants receive training and become full-time employees upon graduation, eligible to sit for VA Journeyman license tests.
• James Madison UniversityminorGTM or Marketing Partner · 8 April 2019RBI sponsors the JMU Top Dog Experience, giving local youth the opportunity to go behind the scenes at games, meet players, and experience university athletics firsthand.
• United Way of Harrisonburg & Rockingham CountyminorOthersRBI participates in annual United Way campaigns, exceeding fundraising goals of $3,500 to support local community services.
• Central Valley Habitat for HumanityminorOthersRBI is a proud supporter of Habitat for Humanity, having contributed resources to multiple Habitat houses including a duplex project.
• The First Tee Shenandoah ValleyminorOthersRBI sponsored The First Tee Shenandoah Valley Golf Classic, supporting youth educational programs through First Tee.
• Valley Scholars ProgramminorOthersRBI sponsors the Valley Scholars Program, supporting local youth educational initiatives.
• Massanutten Technical CentercoreStrategic or Co-development PartnerRBI partners with Massanutten Technical Center for Youth Apprenticeship Program, attending career events and promoting work-based learning opportunities in electricity, welding, and HVAC programs.

Scale indicators6 records

Recent moves6 records

Expansion highlights4 records

Direct peers

• ColonialWebb Contractors: Virginia-based mechanical and plumbing contractor with a comparable institutional, healthcare, and commercial customer mix. Like RBI, it offers design-build MEP construction plus 24/7 service and serves universities, hospitals, and commercial clients across the Mid-Atlantic.
• Limbach Holdings: Publicly-traded (NASDAQ: LMB) mechanical contractor focused on HVAC, plumbing, and building automation for institutional and commercial customers. Closest publicly-traded comp to RBI given similar MEP scope, recurring service mix, and institutional/healthcare/education orientation.
• Lee Company: Tennessee-based mechanical, plumbing, and electrical contractor serving commercial, institutional, healthcare, and industrial clients across the Southeast. Comparable mid-size private mechanical contractor with similar MEP construction and recurring service model.
• Haynes Mechanical Systems: Colorado-based full-service mechanical contractor providing HVAC, plumbing, and building automation for commercial, healthcare, and institutional clients. Similar size, service offering, and customer profile to RBI.
• TDIndustries: Texas-based mechanical contracting and service firm serving commercial, institutional, and industrial clients. Comparable private, employee-owned mechanical contractor with strong apprenticeship and training culture.
• U.S. Engineering Company Holdings: Employee-owned mechanical contractor headquartered in Kansas City serving healthcare, higher education, and industrial clients. Comparable mid-size private MEP contractor with a similar institutional and recurring-service orientation.

Broad incumbents

• EMCOR Group: Largest publicly-traded mechanical and electrical services contractor in the U.S. (NYSE: EME), with broad institutional, commercial, healthcare, and industrial coverage. A scaled incumbent whose operating subsidiaries compete with RBI on large institutional projects and service contracts.
• Comfort Systems USA: NYSE-listed (FIX) parent of RBI and ~40 mechanical contracting subsidiaries across the U.S. Relevant as the parent platform that sets strategy, capital allocation, and operational standards for RBI and its sister operating companies.
• APi Group: NYSE-listed (APG) holding company that owns multiple mechanical, life safety, and specialty services businesses. Provides a broader, more diversified public-market reference for RBI's mechanical services model.

Regional players

• John E. Green Company: Michigan-based mechanical and plumbing contractor serving institutional and commercial customers in the Midwest. Comparable in scope and customer mix but geographically distinct from RBI's Virginia footprint.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/RBIvaCareers

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 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 Riddleberger Brothers