What Indoor Environmental Services does

Indoor Environmental Services (IES), founded in 1988 and headquartered in Sacramento, California, is a full-service commercial and industrial HVAC mechanical services contractor operating as a subsidiary of Service Logic, a national mechanical services platform. The company serves facility owners and operators across three stated verticals — Commercial, Industrial Manufacturing, and Utilities — through three Northern California offices (Sacramento, Santa Rosa, Pleasanton) with additional national coverage extended via Service Logic's network. Core offerings span the full mechanical lifecycle: system assessments, planned maintenance subscriptions, 24/7 emergency repair, equipment replacement (RTUs, chillers, boilers, VRF/VRV, cooling towers), design-build construction, building controls service across ten automation platforms (Honeywell, Johnson Controls, Tridium/Niagara, Siemens, Carrier, Trane, and others), indoor air quality retrofits, and industrial refrigeration.

IES self-performs sheet metal, piping, process piping, start-up, test and balance, and commissioning with an in-house workforce rather than subcontracting, and staffs dedicated Project Managers, Estimators, Registered Professional Engineers, and Certified Energy Managers. Technology partnerships include the XOi digital documentation platform, Global Plasma Solutions Needlepoint Bipolar Ionization for air purification, and ThermaClear (a registered trademark preventative maintenance product developed with ECM Technologies). Revenue is generated through a mix of recurring service/maintenance contracts and project-based design-build and equipment replacement work, sold primarily through direct field sales and 24/7 emergency response lines. Leadership comprises President Eric Yocum (appointed 2025, twenty-year industry veteran), CFO John Anderson, and regional operations directors Robert Harlow (Sacramento) and Josh Mauer (Bay Area), with safety metrics highlighted as a competitive credential — multiple years of zero recordable incidents and an industry-lowest Experience Modification Rate.

Pricing is quote-based on commercial and industrial project scope and is not publicly disclosed; no customer logos are publicly listed, and revenue figures are not disclosed in available source material.

Name

Indoor Environmental Services

Legal name

Indoor Environmental Services

Website

https://ies-hvac.com

Company type

Private

Founded year

1988

Operating status

Operating

Headcount range

101–250 employees

Short description

Indoor Environmental Services is a commercial and industrial HVAC mechanical services contractor in Northern California, offering design-build, planned maintenance, emergency repair, equipment replacement, and building controls across three offices under Service Logic's national network.

Ownership category

akta.pro rank

Headquarters

HQ city

Sacramento

HQ country

United States

HQ region

North America

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. HVAC Service and Maintenance: Ongoing service and maintenance contracts for commercial and industrial HVAC systems, including planned maintenance programs and 24/7 emergency repair services.
2. Construction and Design/Build Services: Design and construction of HVAC systems, industrial refrigeration systems, and comprehensive facility solution projects. Includes new construction, tenant improvements, remodels, and retrofits.
3. Equipment Replacement: Replacement of RTUs, split systems, cooling towers, chillers, boilers, and other mechanical equipment. Handles both quick turnaround direct replacements and custom engineered solutions.
4. System Assessments: Due diligence services for property purchase/lease transactions, owning/operating cost assessments, and capital planning for future budgeting.
5. Building Controls Services: Service and installation of building automation and control systems including Honeywell, Johnson Controls, Tridium/Niagara, Siemens, Carrier, Trane, and other systems.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels3 records

Core offering

IES is a full-service Facility Solutions Contractor that designs, builds, services, maintains, and repairs commercial and industrial HVAC, mechanical, and industrial refrigeration systems across Northern California. The company delivers single-source mechanical solutions through planned maintenance programs, 24/7 emergency repair, system assessments, equipment replacement, building automation controls, indoor air quality solutions, and turnkey design-build construction projects for commercial, industrial manufacturing, and utility-sector facilities.

Product overview

Indoor Environmental Services (IES) is a full-service Facility Solutions Contractor offering a comprehensive portfolio of HVAC and mechanical services for commercial, industrial, and institutional facilities in Northern California. The core offering centers on HVAC Services encompassing system assessments, planned maintenance, emergency repair, equipment replacement, and building controls. These are complemented by specialized services including Design Build (new construction and tenant improvements with in-house sheet metal fabrication), Construction Services (full project lifecycle management), Indoor Air Quality (air purification and filtration solutions), XOi Technology (equipment management and documentation platform), and ThermaClear® (oil-fouling preventative treatment). The company also provides industrial refrigeration services. IES operates through a network of Sacramento, Santa Rosa, and Pleasanton offices, serving commercial, industrial manufacturing, and utilities sectors.

Differentiator

Problem solved

Functional benefit

Brands

• ThermaClear®: An HVAC preventative maintenance solution that eliminates oil-fouling with one treatment, restoring optimal performance and reducing operational costs. Tested and verified by ASHRAE, UL Solutions, and ASTM International.

Products and services

• HVAC Services Core commercial and industrial HVAC solutions including system assessments, planned maintenance, emergency repair, equipment replacement, and controls services for clients throughout Northern California.
• System Assessments HVAC system evaluation services including owning/operating cost assessments and due diligence assessments for property purchase or lease transactions to help customers plan and budget for the future.
• Planned Maintenance Preventive maintenance programs that protect HVAC and mechanical system investments by increasing equipment life and averting potential failures, supported by 24/7 emergency HVAC services.
• Emergency Repair 24/7 emergency HVAC repair services with rapid response times including pumping systems, packaged cooling and heating units, refrigerated systems, and HVAC controls systems.
• Indoor Air Quality Indoor air quality solutions featuring Global Plasma Solutions Needlepoint Bipolar Ionization technology, filter upgrades, and measurement and verification services to create sustainable indoor environments.
• Equipment Replacement Efficient equipment replacement services for commercial buildings including split systems, packaged rooftop units, water source heat pumps, cooling towers, boilers, chillers, VRF/VRV systems, and custom air handlers.
• Design Build Single-source mechanical design-build services for new or retrofitted HVAC systems, including new construction, tenant improvements, remodels, retrofits, and custom sheet metal fabrication.
• Building Controls Building automation and control system services supporting multiple manufacturers including Honeywell, Johnson Controls, Tridium/Niagara, Siemens, Carrier, Trane, and others for diagnostic reviews and new system installations.
• XOi Technology Technology platform enabling proactive commercial HVAC service with virtual tours, equipment readings documentation, asset collection, equipment management, and digital record sharing for insurance and warranty claims.
• Construction Services Full-service construction project management including project coordination, construction documentation, CPM scheduling, fabrication, delivery, installation, commissioning, testing, balancing, controls, and end-user training.
• ThermaClear HVAC preventative maintenance solution that eliminates oil-fouling with one treatment, restoring maximum energy efficiency, extending system lifespan, and preventing future oil-fouling by forming a permanent protective barrier. Approved by ASHRAE, UL Solutions, and ASTM International.

Quantifiable outcome

• Oil-fouling reduces HVAC efficiency by 7% in the first year, 5% in the second, and 2% annually thereafter (per ASHRAE)
• +3 more outcomes

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration13 records

Feature3 records

Partnerships

Four partnerships are on record, tiered flagship and core.

• Service LogicflagshipStrategic or Co-development PartnerParent company providing national program administration, safety programs, and nationwide service network. IES operates as part of Service Logic's portfolio of HVAC companies, enabling coast-to-coast mechanical services through the Service Logic network.
• XOi TechnologycoreTechnology or IntegrationXOi Technology platform is used by IES to provide digital documentation, asset collection, equipment management, virtual tours, and before/after service call records for customers.
• Global Plasma Solutions (GPS)coreTechnology or IntegrationGPS provides Needlepoint Bipolar Ionization (NPBI) technology for indoor air quality solutions. With 150,000+ installations, GPS technology purifies air by eliminating particulates, odors, and pathogens. All products are UL and CE approved.
• ECM TechnologiescoreTechnology or IntegrationDeveloper of ThermaClear, an HVAC preventative maintenance solution that eliminates oil-fouling. ThermaClear is approved under ASHRAE, UL Solutions, and ASTM International standards.

Scale indicators5 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• ACCO Engineered Systems: California-based commercial HVAC and mechanical contractor offering design-build, service, and building controls across the Western US with a service portfolio and target verticals (commercial, industrial) closely comparable to IES's Northern California operation.
• Southland Industries: Multi-state commercial mechanical contractor with design-build, HVAC service, and building automation capabilities; closely comparable to IES in service mix, customer profile, and Western US footprint.
• Comfort Systems USA: Public national commercial HVAC and mechanical services consolidator with multiple regional subsidiaries; comparable to IES in core service mix and customer profile, with a similar multi-site consolidation playbook applied at scale.
• Limbach Holdings: Public mechanical services firm focused on HVAC, plumbing, and building automation for commercial and institutional customers; comparable to IES in recurring service and design-build exposure across similar end markets.
• Murray Company: Privately held commercial HVAC and plumbing mechanical contractor serving Western US customers; comparable to IES as a regional direct peer with similar commercial and industrial focus and similar scale.

Broad incumbents

• EMCOR Group: Public national mechanical and electrical services firm with HVAC as a core offering; comparable as a broad incumbent providing similar capabilities at much larger scale, broader geographic footprint, and lower cost of capital.
• Trane Technologies: Global HVAC OEM with significant installed-base services and controls offerings; comparable broad incumbent that both manufactures and services commercial HVAC systems overlapping with IES's installed base and controls work.
• Carrier Global: Global HVAC OEM with commercial services and controls presence; comparable broad incumbent with overlapping service capabilities on the controls and equipment replacement side that IES services via partnership.
• Johnson Controls: Global building automation and HVAC leader; comparable as a broad incumbent whose systems IES services and whose controls and HVAC service capabilities partially overlap with IES's offerings.
• APi Group: Public safety, security, and specialty mechanical services consolidator with HVAC services via acquired subsidiaries; comparable as a broad specialty services consolidator with a similar buy-and-build growth model around regional mechanicals.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/indoor-environmental-services

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 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 Indoor Environmental Services