MEP (Mechanical, Electrical & Plumbing) / [HVAC (incl. Manual J & D of ACCA) Title 24 Energy Calcs]

AT Engineering Services is a California based consulting engineering firm with capability of providing in-depth innovative quality consulting services that are based on the most current technologies available. AT Engineering Services is a registered consulting firm with the State of California. We provide state-of-the-art designs and engineering services in MEP (Mechanical, Electrical & Plumbing) fields.

AT Engineering's professional engineering team, with years of strong technical experience, has earned an exceptional reputation for customer satisfaction. Projects are delivered in a timely manner with major emphasis placed on coordination with other trades. Our commitment to our clients goes beyond providing quality drawings. Our objective is to be an integrated business partner. We accomplish this by listening to our clients, by understanding their unique business needs, and by providing solutions to help them meet their objectives.
AT Engineering relies heavily on computer technology to produce design and construction documents as well as energy simulations.


Your design and build drawings can be stamped by one of AT Engineering's

in-house registered mechanical and/or electrical professional engineers, State of California.


Construction Types: New Construction, Retrofit & Upgrades


To effectively meet the needs of our valued customers, AT Engineering offers a unique service that is surpassed by no one. Our full-service capabilities include all aspects of MEP (Mechanical, Electrical and Plumbing) design for commercial, industrial, institutional, and residential:
Mechanical Engineering Design Services

HEATING, VENTILATING & AIR CONDITIONING (HVAC) Design (Design & perform cooling & heating load calculations, duct/air distribution design) AT Engineering is an authorized user of the most current software available for design and analysis, such as:

TRANE (Trace 700 Load, Duct Designer, Pipe Designer): For the design of HVAC systems

Right-Suite Universal 7.0: For the design of HVAC systems (including Manual J & D of ACCA)

EnergyPro 4.4: For Title 24 energy calculations


  • VAV (Variable air volume)
  • Constant air volume
  • Chilled water and cooling tower systems
  • Primary and secondary pumping systems
  • Central plant chiller upgrades
  • Chilled water system energy analysis (incl. Hydraulic Calculations)
  • Hot water heating systems
  • Steam distribution systems
  • Mechanical ventilation and exhaust systems
  • Prepare and submit mechanical Title-24 calculations
  • Energy Management Design & Energy conservation / evaluation studies
  • Energy Compliance Codes
  • Heat reclamation / recovery systems
  • Heat pump systems
  • Thermal storage systems
  • Provide stamped plans for plan check and approval (State of California).

Electrical Engineering Design Services:

  • Power, Lighting plan, and Energy compliance ( Electrical Title 24 Calculations)
  • High & Low Voltage Distribution System Design
  • Building & Safety Department Plan Check
  • Electrical Power Quality, Reliability and Safety
  • National Electrical Code (NEC) Compliance
  • HVAC and Plumbing equipment electrical connections and controls.
  • Backup Generation
  • Single Line Diagram Development, Load Calculations and Panel Schedules.
  • Motor Sizing and Protection
  • Fault Calculations and Protective Relay Coordination Studies
  • Electrical Transmission & Distribution
  • Power System Analysis
  • Electrical Power Transformers, Switchgear and Controls
  • Energy Management
  • Electric Utility Deregulation
  • Battery Backup Systems
  • Construction Management
  • Process Controls
  • (P&IDs) Process and Instrumentation Diagrams
  • Construction Administration & Support
  • Provide stamped plans for plan check and approval (State of California).

Plumbing Design Services:

  • Domestic Hot and Cold Water Distribution
  • Hot Water Heating and Circulation Systems
  • Storm and Sanitary Drainage Systems
  • Gas Piping Systems (natural gas, propane gas, oxygen, nitrogen)
  • Chemical Waste Disposal Systems
  • Provide stamped plans for plan check and approval (State of California).



Huntington Beach/Long Beach, CA.: (562) 439-9000


Mailing Address:
AT Engineering Services
P.O. Box 3501, Long beach, CA 90803, USA

Leave a Reply