Top commercial HVAC contractors in Texas, ranked by ChatGPT answers

Places ChatGPT showed

• Kilgore Industries · 4.3★ · Mechanical contractor
• Custom Air Products & Services, Inc. · 4.9★ · local_business
• Gray Mechanical Contractors, LLC · 4.8★ · HVAC contractor
• Shafer Mechanical · 4.8★ · Mechanical contractor
• Holts Mechanical · 4.8★ · Air conditioning contractor
• Prodigy Commercial HVAC · 4.4★ · HVAC contractor
• Local Refrigeration and HVAC · 5.0★ · Commercial refrigerator supplier
• Century Mechanical Contractors · Mechanical contractor

If by “best” you mean strong commercial/industrial capabilities, established operations, service coverage, and credible customer/reputation signals, I’d put these Texas contractors on a shortlist rather than treating any single ranking as definitive:

• Kilgore Industries — Houston / statewide. Particularly suited to large commercial and industrial projects, with HVAC/mechanical construction plus 24/7 service and planned maintenance.
• Custom Air Products & Services, Inc. — Houston / industrial Texas. Strong fit for engineered HVAC, custom equipment, industrial facilities, hazardous-location/explosion-proof applications, retrofits, and ongoing service.
• Gray Mechanical Contractors, LLC — Houston, Austin & San Antonio. Commercial HVAC/mechanical construction, maintenance and emergency service; useful if you need both HVAC and plumbing/mechanical capabilities.
• Shafer Mechanical — San Antonio / Central Texas. Commercial HVAC and plumbing, including chillers, cooling towers, boilers, pumps and controls; lists 24/7 availability.
• Holts Mechanical — San Antonio. Commercial-focused contractor covering new construction, tenant finish-outs, repairs and preventive maintenance.
• Prodigy Commercial HVAC — DFW / North Texas. Commercial-first HVAC/R contractor covering installations, retrofits, replacement and refrigeration.
• Local Refrigeration and HVAC — DFW. Commercial HVAC plus refrigeration, with 24/7 service and a particularly relevant fit for restaurants, food service and temperature-controlled facilities.
• Century Mechanical Contractors — Fort Worth / DFW. Long-established mechanical contractor with commercial HVAC, industrial mechanical, plumbing and geothermal capabilities.

How I'd narrow it down

There are hundreds of commercial HVAC contractors in Texas, so geography and project type make a major difference. BBB, for example, currently lists hundreds of commercial HVAC/air-conditioning contractors across the state, while Dallas-specific directories identify dozens of contractors explicitly serving commercial buildings.

If you tell me the Texas city/metro, building type (warehouse, office, hospital, restaurant, manufacturing, etc.), and approximate project size, I can narrow this to 5–10 contractors and compare their commercial capabilities, service areas, licensing/reputation, and contact information.

Places ChatGPT showed

• Venture Mechanical Inc · 4.3★ · Mechanical contractor
• Kilgore Industries · 4.3★ · Mechanical contractor
• RDI Mechanical · 4.7★ · Mechanical contractor
• Hunton Services · HVAC contractor
• NTD Mechanical · 4.9★ · Mechanical contractor
• Kahn Mechanical Contractors · 4.5★ · HVAC contractor
• Shafer Mechanical · 4.8★ · Mechanical contractor
• Holts Mechanical · 4.8★ · Air conditioning contractor

For office buildings and light-industrial facilities in Texas, I’d build an RFP shortlist around contractors with demonstrated commercial/industrial mechanical work, not residential HVAC companies. I wouldn’t call any one company objectively “best” without knowing your metro, building size, and scope, but these are strong candidates to investigate:

• Venture Mechanical Inc — DFW/Carrollton. Commercial mechanical construction, renovations, service/maintenance, BIM, commissioning and larger HVAC systems. A good candidate for larger office or industrial projects.
• Kilgore Industries — Houston. Broad commercial/industrial mechanical capabilities, with HVAC, electrical and plumbing plus 24/7 service and planned maintenance.
• RDI Mechanical — Houston area. Particularly relevant to owners needing commercial/industrial HVAC service, retrofits, replacements or new construction.
• Hunton Services — Houston/Southeast Texas. Strong fit for larger commercial facilities, campuses and industrial environments, including ongoing service and emergency response.
• NTD Mechanical — DFW. Commercial HVAC construction, ductwork, piping and preventative maintenance; worth considering for office/industrial facilities requiring broader mechanical work.
• Kahn Mechanical Contractors — DFW. Focuses on commercial/industrial HVAC and serves offices, warehouses, healthcare and other facilities.
• Shafer Mechanical — San Antonio/Central Texas. Commercial HVAC and mechanical/plumbing work with maintenance and service capabilities.
• Holts Mechanical — San Antonio. Commercial-focused HVAC contractor covering new construction, tenant finish-outs, repairs and preventive maintenance.

A statewide option worth putting on the RFP

TDIndustries is particularly notable if you have multiple buildings, a large facility, major replacement work, or want one provider for construction plus ongoing maintenance. TD lists commercial HVAC construction, design-build/design-assist, service, replacement and preventive maintenance, and has Texas locations in Dallas, Fort Worth, Houston, Austin, San Antonio, Amarillo, Lubbock and Midland. Its project portfolio includes both commercial/office and industrial work.

If you want a manufacturer-backed option

Trane Technologies has commercial teams in multiple Texas markets and offers commercial HVAC systems, repairs/maintenance, controls/building automation, energy services and contracting. That can be attractive when the project involves chillers, controls, energy optimization or a major equipment modernization.

How I'd narrow the field

For an office/light-industrial RFP, I'd ask each contractor for:

1. 3–5 comparable projects — ideally similar square footage, equipment and occupancy.
2. Service response commitments — especially after-hours response and critical-equipment escalation.
3. Preventive-maintenance pricing separately from repair labor.
4. Controls/BAS capabilities and experience integrating existing controls.
5. Experience with RTUs, VAV systems, AHUs, chillers, cooling towers and industrial ventilation, as applicable.
6. Energy-reduction recommendations rather than simply replacing equipment like-for-like.
7. Licensing, insurance, safety record and relevant certifications.
8. Whether service is self-performed or subcontracted.
9. A clear schedule for equipment replacement, including lead times.
10. References from facility managers/property managers, rather than only general contractors.

If you tell me which Texas metro (Dallas–Fort Worth, Houston, Austin, San Antonio, etc.), approximate building square footage, and whether this is ongoing maintenance or a construction/replacement project, I can narrow this to a 5–7 contractor shortlist with service area, capabilities, comparable projects, and contact information.

Places ChatGPT showed

• Kahn Mechanical Contractors · 4.5★ · HVAC contractor
• Polk Mechanical Co LLC · 3.9★ · Mechanical contractor
• M Tech Comfort Systems, USA · 4.0★ · Mechanical contractor
• Shafer Mechanical · 4.8★ · Mechanical contractor
• Gray Mechanical Contractors, LLC · 4.8★ · HVAC contractor
• HB Mechanical Services Inc. · 4.3★ · HVAC contractor
• South Texas Boiler Industries · 4.7★ · Heating contractor

If you need both commercial rooftop units (RTUs) and boiler systems, I’d focus on contractors with demonstrated experience in both air-side and hydronic/steam equipment—not just general commercial AC.

Here’s a Texas shortlist based on the capabilities I found:

• Kahn Mechanical Contractors — Dallas–Fort Worth. Particularly broad scope: RTUs, boilers, chillers, VRF, controls, preventive maintenance, repair and replacement. Kahn says it has served DFW since 1974 and handles everything from individual rooftop units to central plants.
• Polk Mechanical Co LLC — DFW / Grand Prairie. A strong fit when the project is more substantial or industrial: boilers, burners, chillers, AHUs/RTUs, pumps, hydronic and steam systems, controls, balancing and mechanical retrofits.
• M Tech Comfort Systems, USA — Central Texas / Austin–Round Rock. Commercial mechanical contractor with retrofit/replacement capabilities ranging from individual rooftop units through boiler and chiller plants, plus automation and larger whole-building projects.
• Shafer Mechanical — San Antonio / Central Texas. Commercial mechanical specialist with boiler and pump expertise alongside broader HVAC, chilled-water and controls work.
• Gray Mechanical Contractors, LLC — Houston. Commercial mechanical contractor with RTUs, chillers, cooling towers, AHUs, VRF and retrofit/replacement work; worth considering for larger Houston-area facilities.
• HB Mechanical Services Inc. — Houston-area / Porter. Commercial-focused contractor covering HVAC, boilers, automation, construction and even temporary boiler/chiller equipment.
• South Texas Boiler Industries — Houston / Gulf Coast. If the boiler side is especially important, this is a specialist worth including in the bid set. It focuses on commercial/industrial steam and hot-water boiler rooms, service, turnkey installation, rentals, parts and engineering.
• Direct Service — Houston. Its commercial offering explicitly covers RTUs, boilers, chillers, VAV systems, maintenance, emergency repairs and controls.

How I'd narrow the field

One important distinction: RTU work is relatively common among commercial HVAC companies; boiler work—especially steam, combustion, burners, pumps, condensate return and boiler-room controls—is a more specialized capability. For a facility that has both, I'd favor a contractor that can take responsibility for the complete mechanical system rather than splitting the RTU and boiler scopes between vendors.

If you tell me the Texas city/metro, building type, approximate RTU sizes/count, and whether the boilers are steam or hot-water, I can narrow this to a 3–5 contractor bid list and compare licenses, service coverage, emergency response, boiler capabilities, and relevant project experience.

Places ChatGPT showed

• Kahn Mechanical Contractors · 4.5★ · HVAC contractor
• Gray Mechanical Contractors, LLC · 4.8★ · HVAC contractor

Yes. I found several Texas contractors that explicitly advertise 24/7 emergency commercial HVAC service. Coverage varies by metro, so the service area is important.

• Kahn Mechanical Contractors — Dallas–Fort Worth. Commercial-only mechanical contractor; advertises 24/7/365 emergency HVAC response, including direct dispatch.
• Gray Mechanical Contractors, LLC — Houston. Commercial/industrial HVAC and mechanical contractor offering 24/7 emergency mechanical service.
• ACIS / affiliated service teams — Dallas-Fort Worth, Houston, Austin, and San Antonio. ACIS states that its commercial emergency service is available 24/7, with local teams covering each of those markets.
• Buffalo Mechanical & Refrigeration — Houston, Dallas-Fort Worth, and East Texas, with service extending to 20 Texas communities. Commercial/industrial only and explicitly advertises 24/7 emergency HVAC and refrigeration repair.
• OnPoint Mechanical — Greater Houston plus Central/East Texas. Commercial HVAC/mechanical contractor offering 24/7/365 emergency service and advertising a four-hour response-time guarantee.
• Neva Corporation — Houston and South-Central Texas. Commercial/industrial HVAC contractor with technicians on call 24/7.
• Traylor Mechanical — Greater Houston and South Texas. Commercial/industrial HVAC specialist advertising 24/7 emergency service, particularly for schools, office campuses, and other institutional facilities.
• Mueller & Wilson (MWI) — Central and South Texas. Commercial HVAC/mechanical emergency service 24 hours a day, 7 days a week, including holidays; the company states a two-hour response guarantee.
• Accurate Air Solutions — Abilene, Lubbock, and Dallas. Commercial/industrial HVAC and MEP contractor with 24/7 emergency dispatch.
• TFC Mechanical / DFW Mechanical Group — Texas-wide/DFW and Houston-area operations. Both advertise 24-hour emergency commercial HVAC service.

A few particularly broad-coverage options

If you need a contractor capable of handling commercial/industrial equipment rather than residential AC, I'd start by contacting Buffalo Mechanical & Refrigeration, ACIS, OnPoint Mechanical, or Kahn Mechanical, depending on your facility's location. Their published service descriptions specifically cover commercial systems and emergency response.

If you tell me the Texas city/ZIP code and type of facility (warehouse, office, restaurant, manufacturing plant, hospital, data center, etc.), I can narrow this to contractors that actually cover your area and compare their 24/7 response, commercial specialties, licensing, and contact information.

Places ChatGPT showed

• Kahn Mechanical Contractors · 4.5★ · HVAC contractor
• Bellomy Industries & Mechanical Services - B.I.M.S., Inc · 4.3★ · HVAC contractor
• Polk Mechanical Co LLC · 3.9★ · Mechanical contractor
• Venture Mechanical Inc · 4.3★ · Mechanical contractor
• Quantum North America · 4.5★ · Tradesmen
• New Generation Mechanical · 4.3★ · Mechanical contractor
• RushCo Energy Specialists · 3.0★ · Air conditioning contractor
• Alliance Mechanical Services, LLC · 4.9★ · Mechanical contractor
• Dynamic Mechanical Solutions · 4.7★ · Mechanical contractor

If you mean commercial-focused HVAC contractors—rather than residential companies that also take commercial jobs—there are several DFW firms worth putting on your bid list. I’d evaluate them by commercial specialization, longevity, technical scope, emergency response, and the ability to handle both maintenance and major equipment work.

Strong DFW options

• Kahn Mechanical Contractors — Dallas
• Family-owned and operating since 1974.
• Commercial-only focus, including offices, healthcare, warehouses, data centers and multi-tenant properties.
• Handles rooftop units, chillers, VRF, controls/building automation, refrigeration, preventive maintenance and mechanical construction.
• Advertises 24/7 emergency response for contract customers.
• Good fit: Facilities that want one long-term commercial mechanical/HVAC partner.
• Bellomy Industries & Mechanical Services - B.I.M.S., Inc — Grapevine
• Particularly oriented toward commercial and industrial HVAC-R.
• Services chillers and complex mechanical systems; its site says it is certified by Trane, Carrier, York and Daikin for chiller work.
• Also handles controls, industrial HVAC, refrigeration and preventative maintenance.
• Good fit: Industrial facilities, larger commercial buildings and facilities with chilled-water systems.
• Polk Mechanical Co LLC — Grand Prairie
• Large commercial/industrial mechanical contractor with HVAC, plumbing, piping and sheet-metal capabilities.
• Particularly relevant for major construction, healthcare, industrial and complex facility projects.
• Good fit: Large capital projects where HVAC is part of a broader mechanical scope.
• Venture Mechanical Inc — Carrollton
• Commercial mechanical construction, renovations and ongoing service/maintenance.
• Has experience with major DFW projects, including large office and hotel developments.
• Good fit: Developers, general contractors and owners with substantial construction or retrofit projects.
• Quantum North America — Fort Worth
• Commercial/industrial MEP contractor with capabilities involving chillers, boilers, cooling towers, air handlers and building automation.
• Particularly oriented toward complex facilities and central utility systems.
• Good fit: Industrial, institutional and critical-facility applications.
• New Generation Mechanical — Dallas
• Full-service commercial mechanical contractor covering HVAC, plumbing, maintenance, replacement and emergency service.
• Advertises 24/7 service and work throughout the DFW area.
• Good fit: Commercial property managers wanting ongoing maintenance plus emergency response.

Also worth considering

• Trane Commercial — and. This is worth considering when you want manufacturer-backed expertise, particularly for Trane equipment. Their DFW operation lists repairs, maintenance, contracting, controls/building automation, energy services and rentals.
• RushCo Energy Specialists — especially relevant for chillers, cooling towers, pumps and industrial/process HVAC, with emergency and rental capabilities.
• Alliance Mechanical Services, LLC — a smaller Euless-based commercial HVAC/mechanical firm with a maintenance and rapid-response orientation.
• Dynamic Mechanical Solutions — commercial mechanical contractor serving facilities including manufacturing, distribution, healthcare, education and data centers.

How I'd narrow the field

For a typical office/retail/warehouse facility, I'd solicit proposals from Kahn, New Generation Mechanical, and one of the larger mechanical contractors such as Polk or Venture.

For a facility with chillers, cooling towers, boilers or sophisticated controls, I'd put BIMS, Kahn, RushCo and Trane on the shortlist.

For a large construction/renovation project, I'd look particularly at Polk, Venture, Quantum and Kahn.

One important caveat: “reliable” is difficult to establish from online ratings alone, especially for commercial HVAC. A contractor can have excellent residential reviews but little experience maintaining a 500-ton chiller plant. For a serious commercial contract, I'd ask each bidder for 3–5 references for facilities similar to yours, their response-time SLA, technician staffing, after-hours coverage, licensing/insurance documentation, preventive-maintenance scope, and examples of comparable equipment they've serviced.

If you tell me what kind of building you have, approximate square footage, location within DFW, and whether you need maintenance, repairs, replacement, or new construction, I can narrow this to a 3–5 contractor bid list and compare their capabilities.

Places ChatGPT showed

• Kilgore Industries · 4.3★ · Mechanical contractor
• Custom Air Products & Services, Inc. · 4.9★ · local_business
• Gray Mechanical Contractors, LLC · 4.8★ · HVAC contractor
• RDI Mechanical · 4.7★ · Mechanical contractor
• K&R Mechanical Services · 4.4★ · HVAC contractor
• The Way Companies · 4.9★ · HVAC contractor
• Vista Air Services · 5.0★ · HVAC contractor
• Coopwood's Air Conditioning, Inc. · 5.0★ · Air conditioning contractor

If by “best” you mean commercial-focused contractors with substantial Houston-area capabilities, rather than residential HVAC companies that also take commercial jobs, I’d put these on the shortlist:

• Kilgore Industries — Broad commercial/industrial mechanical contractor with HVAC construction, fabrication, service, maintenance, plumbing, and electrical capabilities. Particularly relevant for large or complex facilities and projects requiring multiple trades.
• Custom Air Products & Services, Inc. — Strong fit for industrial/commercial HVAC, custom air-handling equipment, retrofits, hazardous-location applications, installation, and ongoing service.
• Gray Mechanical Contractors, LLC — Commercial mechanical contractor with HVAC, chillers, cooling towers, building automation, preventive maintenance, and emergency service capabilities.
• RDI Mechanical — Good candidate for larger commercial construction, renovations, equipment replacement, and ongoing mechanical/HVAC service; its stated markets include data centers, healthcare, education, government, retail, and industrial facilities.
• K&R Mechanical Services — Commercial HVAC plus plumbing, refrigeration, controls/building automation, and sheet-metal fabrication; useful if you want a broader mechanical-services relationship.
• The Way Companies — Commercial/industrial HVACR and facility-services contractor, with particular relevance to industrial/process cooling and environmental-control applications.
• Vista Air Services — Commercial/industrial-focused HVAC contractor with preventive-maintenance capabilities; potentially worth considering for ongoing facility maintenance.
• Coopwood's Air Conditioning, Inc. — Long-running Houston commercial/industrial HVAC contractor that handles design-build and construction-support work in addition to service.

There are hundreds of companies listed under commercial HVAC in the Houston market, so the right shortlist depends heavily on the building and scope. BBB, for example, currently lists hundreds of commercial air-conditioning contractors in the Houston area.

How I'd narrow it down

I wouldn't choose purely on online star ratings—the commercial HVAC job may involve RTUs, AHUs, chillers, BAS controls, TAB/commissioning, emergency response, and preventative-maintenance contracts, where relevant experience matters considerably more than a large collection of residential reviews.

If you tell me what type of building you have (office, warehouse, retail, restaurant, multifamily, medical, industrial, etc.), approximate square footage, and whether you need installation, replacement, or maintenance, I can narrow this to 3–5 Houston contractors specifically suited to your project and compare their capabilities, reviews, licensing/credentials, and service areas.

Places ChatGPT showed

• Modern Mechanical Services · 4.6★ · HVAC contractor
• Reliable Plant Maintenance, Inc · 5.0★ · HVAC contractor
• Gray Mechanical Contractors, LLC · 4.8★ · HVAC contractor
• Holts Mechanical · 4.8★ · Air conditioning contractor
• Shafer Mechanical · 4.8★ · Mechanical contractor

If by “best” you mean the strongest preventive-maintenance capabilities and program structure, rather than simply the highest-rated contractor, I’d look closely at these Texas options. I’m basing this on the published scope of their PM programs—scheduled inspections, predictive/remote monitoring, reporting, parts/labor coverage, and lifecycle management—not on an overall “winner” ranking.

Strong Texas options

• Modern Mechanical Services — DFW / statewide Texas
• Commercial-only contractor.
• Offers custom PM plans matched to equipment, budget, operating schedule, and multi-site portfolios.
• Particularly interesting if you manage several properties and want one maintenance provider across DFW, Austin, San Antonio, and Houston.
• Reliable Plant Maintenance, Inc — North Texas
• Commercial/industrial HVAC maintenance with a strong emphasis on preventive/predictive maintenance and building automation.
• Worth considering for facilities where uptime and controls/automation are important.
• Gray Mechanical Contractors, LLC — Houston
• Commercial mechanical contractor with preventive-maintenance and planned service programs, plus emergency response.
• A reasonable candidate for Houston-area facilities wanting HVAC alongside broader mechanical services.
• Holts Mechanical — San Antonio / Central Texas
• Commercial-focused HVAC contractor offering ongoing service, repairs, and preventive maintenance.
• Could be a good fit when you want a local commercial contractor rather than a national OEM service organization.
• Shafer Mechanical — San Antonio / Central Texas
• Commercial HVAC maintenance and diagnostics, including cooling-tower preventive maintenance.
• Especially relevant for facilities with more complex central-plant equipment.

Also consider the major OEM service organizations

For larger buildings, hospitals, campuses, industrial facilities, or portfolios, I would get bids from the major manufacturers as well:

• Trane — Its commercial agreements can include scheduled preventive maintenance, predictive diagnostics, energy assessments, BAS support, refrigerant tracking, and continuous remote monitoring.
• Carrier — BluEdge agreements combine preventive maintenance with continuous monitoring, predictive insights, 24/7 support, and lifecycle planning; Carrier says it services equipment across brands.
• Johnson Controls — Particularly notable for condition-based/predictive maintenance, remote diagnostics, connected equipment, and tiered planned-service agreements.
• Daikin Applied — Offers inspection, labor, and comprehensive PM plans, with factory-trained technicians, seasonal startups/shutdowns, detailed reporting, and options covering parts, labor, materials, and refrigerant.

What I would require in the RFP

Don't compare these companies solely on the number of scheduled visits. Ask each contractor to quote the same PM scope and specifically spell out:

1. Equipment inventory and asset-level PM schedule
2. Seasonal startup/shutdown procedures
3. Coil, condenser, evaporator and heat-exchanger cleaning
4. Electrical/mechanical inspections and measurements
5. Refrigerant/leak management
6. Filter and belt management
7. Vibration/oil analysis where appropriate
8. BAS/controls inspection and calibration
9. Trend-based or predictive monitoring
10. Written inspection reports with photos and measured readings
11. Deficiency prioritization (critical / near-term / monitor)
12. Repair recommendations separated from PM work
13. Emergency response SLA
14. Parts/labor/refrigerant coverage options
15. Asset-life and replacement planning
16. Customer portal and maintenance history
17. Named technician/account manager
18. Pricing for adding/removing equipment

The distinction is important: a basic twice-a-year “tune-up” is very different from a genuine asset-management program. Trane, Carrier, Daikin and Johnson Controls all currently advertise capabilities that go beyond conventional PM into predictive monitoring and lifecycle management.

If you tell me which Texas metro (Dallas, Houston, Austin, San Antonio, etc.), building type, approximate square footage, and HVAC equipment (RTUs, chillers, VRF, cooling towers, etc.), I can narrow this to 5–8 contractors and compare their actual PM programs, service coverage, reviews, and likely fit.

Places ChatGPT showed

• Kahn Mechanical Contractors · 4.5★ · HVAC contractor
• Chapa Service Co · 4.7★ · HVAC contractor
• Gray Mechanical Contractors, LLC · 4.8★ · HVAC contractor
• G & W Service Company Inc · 4.9★ · Air conditioning repair service
• Holts Mechanical · 4.8★ · Air conditioning contractor
• Alliance Mechanical Services, LLC · 4.9★ · Mechanical contractor
• Cold Tex Refrigeration LLC · 4.3★ · Air conditioning contractor

Yes. If by “trusted” you mean locally/family owned, established in Texas, commercial-focused, and showing credible evidence of repeat facility/property-manager relationships, I’d put these firms on a facility manager’s initial RFP list.

I’m not treating review scores alone as proof of trust; I weighted ownership, longevity, commercial specialization, maintenance/service capabilities, and evidence of commercial-client relationships.

Strong Texas candidates

• Kahn Mechanical Contractors — Dallas–Fort Worth
• Family-owned since 1974, now second-generation.
• Commercial/industrial HVAC and mechanical work, including preventive maintenance, controls/building automation, emergency service, refrigeration and larger mechanical construction.
• Particularly relevant for office, healthcare, industrial, data-center and multi-tenant properties.
• Kahn publishes testimonials from a distribution-center director, a Colliers property manager/lead engineer, and a facilities manager, which is unusually relevant evidence for your question.
• Current business-search data shows 4.5/5 from 14 reviews.
• Chapa Service Co — Dallas–Fort Worth
• Family-owned and locally operated for 30+ years.
• Commercial-focused, with maintenance, repair, retrofit, medical-facility HVAC, tenant finish-outs, remodels and new construction.
• This is the sort of smaller contractor I'd investigate when a facility manager wants direct owner/local-management access rather than a national service organization.
• Current business-search data shows 4.7/5 from 6 reviews.
• Gray Mechanical Contractors, LLC — Houston
• Houston-based commercial mechanical contractor established in 2008.
• HVAC/plumbing construction plus ongoing facility service, preventive maintenance and emergency response.
• Current business-search data shows 4.8/5 from 31 reviews.
• I'd investigate them particularly for facilities that need more than just HVAC service—e.g., mechanical/plumbing coordination.
• Coopwood's Air Conditioning — Houston / Texas Gulf Coast
• Second-generation family-owned and operated, founded in 1980.
• Commercial and industrial work is a major part of the business, with an explicit emphasis on complex projects, safety, budgets and delivery.
• Their stated service history covers the Texas Gulf Coast for more than four decades.
• G & W Service Company Inc — Houston
• Long-running family-owned Houston contractor.
• Commercial HVAC service/installation includes RTUs, air handlers, chillers, boilers, controls/automation, exhaust and other commercial equipment.
• Current business-search data shows 4.9/5 from 13 reviews.
• Worth considering where the facility has older or mechanically complicated equipment rather than just standard rooftop units.
• Air Texas Mechanical — Houston / Dallas / Fort Worth / Austin
• Privately owned and operated since 1984.
• Unusually clear commercial orientation: it says it focuses exclusively on commercial, industrial and institutional organizations, with an emphasis on operating cost and energy efficiency.
• That makes it especially interesting for larger facilities where energy management and lifecycle cost matter.
• Holts Mechanical — San Antonio
• Long-established, locally based commercial HVAC contractor.
• Focuses on commercial work including new construction, tenant finish-outs, service, repairs and preventive maintenance.
• Current business-search data shows 4.8/5 from 21 reviews.
• This would be one of the San Antonio companies I'd investigate for a conventional facility-management relationship.
• Alliance Mechanical Services, LLC — Euless / DFW
• Commercial HVAC/mechanical contractor serving DFW.
• Emphasis on rapid-response service, repair and maintenance; customer testimonials specifically mention responsiveness and knowledgeable technicians.
• Current business-search data shows 4.9/5 from 9 reviews.
• Smaller review base means I'd validate references directly rather than relying heavily on the rating.
• Cold Tex Refrigeration LLC — Terrell / DFW
• Family-owned, founded in 2010, with a specifically commercial orientation.
• HVAC plus refrigeration, RTUs, split systems, exhaust/make-up air, controls and VRF/VRV.
• Particularly relevant for foodservice, grocery, cold storage or other refrigeration-heavy facilities.

A particularly interesting statewide option

Air Texas Mechanical stands out for a different reason: it isn't simply a family HVAC company that also does commercial work. Its published positioning is specifically around commercial, industrial and institutional facilities, and it has operations in Houston, Dallas, Fort Worth and Austin.

That's an important distinction if you're managing a portfolio rather than a single small building.

How I'd vet these before awarding a contract

For a facility manager, I'd ask each finalist for:

1. Three current commercial references — preferably facility managers, property managers or chief engineers rather than homeowners.
2. A sample preventive-maintenance report showing what the technician actually documents.
3. Average emergency response time for contracted customers, not their advertised maximum.
4. Technician staffing — employees vs. subcontractors and how many commercial technicians are actually in your market.
5. After-hours escalation process — who answers at 2 a.m. on a July Saturday?
6. Controls/BAS capability if you operate a larger facility.
7. Manufacturer certifications relevant to your equipment: Trane, Carrier, Daikin, York, Lennox, Mitsubishi, etc.
8. Parts inventory and truck stock for your major equipment.
9. PM agreement pricing and exclusions — especially refrigerant, controls, belts, filters and emergency labor.
10. A customer retention/reference list for facilities they've serviced for 5+ years.

One caution: “family-owned” and a high Google rating aren't enough to establish that facility managers trust a contractor. The strongest signal is a contractor that can give you several named commercial references with comparable facilities and demonstrate consistent service documentation.

If you tell me which Texas market(s) you're responsible for (DFW, Houston, Austin, San Antonio, statewide, etc.) and roughly what type/size of facilities you manage, I can narrow this to a 5–10 contractor shortlist and compare ownership, years in business, commercial specialties, service-area coverage, reviews, certifications, and apparent facility-management fit without simply ranking them by star rating.