Mechanical Retrofit Solutions
Most contractors replace the component. ACIS evaluates the system, asking why it’s failing before recommending how to fix it.
Mechanical Retrofit Solutions
ACIS delivers commercial mechanical retrofit solutions that help building owners, engineers, and facility managers improve energy performance, extend equipment life, and reduce operating costs without the disruption of full system replacement.
Renovation, retrofit, and modernization projects represent one of the highest-value investments a facility can make. Whether your building needs updated equipment, redesigned ductwork, upgraded controls, or a complete mechanical overhaul, ACIS provides a single source of accountability from design and estimation through project completion.
What Drives a Retrofit Project
Commercial facilities pursue mechanical retrofits for a range of reasons. These include aging equipment approaching end of life, rising energy costs, changing space requirements, sustainability goals, or systems that simply no longer meet the demands of how a building is being used. ACIS works with facility teams to evaluate existing conditions and recommend retrofit strategies aligned with operational needs.
Our approach goes beyond simple equipment swaps. Before recommending a solution, we ask the questions that lead to better long-term outcomes. We consider energy efficiency, future serviceability, controls integration, and total cost of ownership.
Retrofit & Modernization Capabilities
Equipment Replacement & Upgrades
ACIS replaces and upgrades all major commercial HVAC equipment types, including chillers, air handlers, rooftop units, boilers, cooling towers, VRF systems, and more. Our teams manage the full scope, including rigging, piping modifications, electrical coordination, controls integration, and startup, with factory-trained technicians across major equipment manufacturers.
Compressor & Refrigeration Diagnostics
ACIS replaces and upgrades all major commercial HVAC equipment types, including chillers, air handlers, rooftop units, boilers, cooling towers, VRF systems, and more. Our teams manage the full scope, including rigging, piping modifications, electrical coordination, controls integration, and startup, with factory-trained technicians across major equipment manufacturers.
Variable Refrigerant Flow (VRF) Systems
VRF systems offer a modular, energy-efficient alternative to traditional DX cooling and are particularly well suited to buildings with diverse load profiles, space constraints, or noise sensitivity requirements. ACIS evaluates each facility’s operating profile to determine whether VRF is the right technical fit, rather than defaulting to a direct replacement. The ability to ramp refrigerant flow up and down in response to demand delivers measurable energy savings compared to conventional constant-capacity systems.
VRF systems are also a strong option where flexible installation is a priority. Many units are modular in design and can be configured in spaces where larger traditional systems cannot.
For facilities considering VRF, ACIS delivers a true design-build solution, from upfront layout and system design through installation, startup, and ongoing service, backed by comprehensive warranties. That built-in assurance is what makes VRF adoption straightforward. The same team that designs the system installs it, services it, and stands behind it if something needs attention. Because our service organization supports all makes and models, we’re not limited to a single manufacturer’s ecosystem. We design around what’s right for your facility, not what we’re required to sell.
Ductwork Modifications & Airflow Redesign
Facilities evolve through tenant changes, renovations, or occupancy shifts, and HVAC ductwork often lags behind. ACIS redesigns and modifies duct systems to restore proper airflow distribution, address comfort complaints, and support updated equipment or zoning requirements.
Variable Air Volume (VAV) System Upgrades
Upgrading from constant volume to variable air volume systems is one of the most effective ways to reduce energy consumption in commercial buildings. ACIS has extensive experience with VAV terminal system installation and replacement, including the controls integration required to make VAV systems perform as designed.
Retro Commissioning
Not every building needs new equipment. Sometimes existing systems are simply not operating as designed. Retro commissioning is a systematic process for evaluating existing HVAC systems, identifying operational deficiencies, and restoring performance to design intent. For many facilities, retro commissioning delivers significant energy savings with minimal capital investment, making it a high-return first step before pursuing larger retrofit or replacement projects.
Computer Room & Data Center HVAC Retrofits
Data center and computer room environments have specific cooling requirements that standard commercial retrofits do not address. ACIS has experience with CRAC and CRAH unit replacement, precision cooling upgrades, and chilled water plant modifications for technology-critical facilities across the DFW and Houston markets.
Full Retrofit Capability List
- Chiller replacement and additions — water-cooled and air-cooled
- Air handler unit replacement and additions
- Self-contained water-cooled units
- Rooftop unit (RTU) replacement and additions
- Boiler replacement and hot water system upgrades
- Cooling tower retrofits, replacements, and additions
- Variable Refrigerant Flow (VRF) system installation
- Variable Air Volume (VAV) terminal system upgrades
- Ductwork modifications and replacement
- Make-up air systems
- Heat pump systems
- Humidification and dehumidification systems
- Computer room air conditioner (CRAC) replacement and additions
- Retro commissioning and system performance validation
- BAS integration and controls upgrades
Single-Source Project Accountability
Complex retrofit projects rarely involve mechanical work alone. ACIS integrates HVAC, building automation, electrical, and plumbing services through a single-source model — eliminating the coordination gaps that come with managing multiple contractors. The result is projects that stay on budget, meet deadlines, and deliver the performance outcomes facilities expect. Our team has the ability to design, estimate, and manage mechanical retrofit projects from initial assessment through final commissioning.
Key Benefits of a Retrofit with ACIS
- Reduced energy costs and measurable return on investment from energy savings
- Upgraded systems that meet or exceed current environmental and efficiency requirements
- Extended equipment asset life and reduced capital replacement costs
- Minimal operational disruption with work scheduled around facility needs
- Single-source accountability across all trades
- Transparent project communication and electronic documentation
- Reduced kW/ton through tube cleaning, refrigerant optimization, and control tuning
- Significant reduction in unplanned downtime through predictive maintenance and oil analysis
Refrigerant Management & Phase-Out Planning
Refrigerant phase-outs are an active compliance issue for many commercial facilities, particularly those operating older chiller equipment on R-22 or R-123. ACIS helps clients develop long-term refrigerant management strategies that balance compliance, equipment reliability, and capital planning rather than forcing immediate replacement when it may not be necessary.
Our refrigerant services include phase-out assessments, R-22 and R-123 transition planning, retrofit feasibility studies, leak reduction programs, and lifecycle cost analysis. The goal is to give facility teams practical options based on actual equipment condition and budget, not a default recommendation to replace.
- Avoided unnecessary equipment replacement through component-level diagnosis
- Transparent project communication and electronic documentation
