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Comprehensive Mechanical Contracting Solutions

When you want more than just a bid - think Jarrell

We have acquired H&A Mechanical Services, a commercial refrigeration service and installation company, bringing this complex industry into our in-house design build capabilities.

Intelligent Solutions Yield Better Control

When you work with Jarrell you get more than just a bid. We provide comprehensive, intelligent solutions that ensure consistent, comfortable temperatures in a cost-effective and energy efficient manner.

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Single Source For Time + Cost Savings

We are your single-source mechanical contractor dedicated to providing quality service and value to every project since 1954. Our specialty lies in developing creative Design/Build solutions that maximize value for general contractors, building owners and building managers alike.

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Our design team is focused on "Value Engineering".
  • 15 Engineers
  • 8 P.E.s
  • 4 CAD/BIM specialists
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Our controls team can help save as much as 20% on energy.
  • Utilize an Open Protocol approach
  • NEBB Certified
  • Specialists in Direct Digital Control systems
  Prefab Shops
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Prefab Shops

Our prefab shops allow us to manufacture in a controlled environment.
  • 21,500 square foot sheet metal shop
  • 16,000 square foot pipe fabrication shop
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Our monitoring team can spot issues before they become problems.
  • 24/7 Automated Monitoring
  • Experience in over 250 buildings
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Our service teams handle everything from start up to warranties.
  • 100+ Service Vans
  • 654 Service Contracts
  • NEBB Certified
  Energy Optimization
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Energy Optimization

Our entire team helps customers save energy and money.
  • Energy Audits
  • Retro-Commissioning
  • Energy Rebates
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When you want to ensure tenant comfort

Think Jarrell

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When you want to operate as efficiently as possible

Think Jarrell

Jarrell Employee

When you need a team you can rely on

Think Jarrell


Our Work

Terra at the Grove

Terra at the GroveSt. Louis, MO

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100 Above the Park

100 Above the ParkClayton, MO

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Delmar Divine

Delmar DivineSt. Louis, MO

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15 Engineers

Experienced, intelligent in-house engineers with a focus on "value engineering".

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NEBB Certified

Our NEBB certified installers and technicians are experts in performing in-house testing and balancing.

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100+ Service Vans

With Jarrell, you can rest easy knowing we have one of the cities largest fleets of vehicle service technicians.

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24/7 Monitoring

Our 24/7 remote monitoring ensure total comfort for over 250 buildings and counting...

Specialists in Saving Energy

Jarrell's Green Energy Management Solutions (GEMS) team works with building owners and managers to find cost effective solutions to reduce energy usage, improve occupant comfort, cut costs and qualify for rebates and incentives.

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Continutal Improvements