HVAC Construction
Design-Build HVAC: One Team From Concept to Commissioning
Split responsibility between an engineer and a contractor creates gaps. Design-build eliminates them. Circulating Air provides single-source HVAC — mechanical design, engineering, installation, and commissioning under one contract. Faster timelines. Clearer accountability. Better-performing systems.
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60 Years Serving Los Angeles
NATE, STAR, and TAB Certified Technicians
24/7 Emergency Dispatch
The Problem
The Problem With Splitting Design and Installation
In a traditional design-bid-build process, the mechanical engineer designs the system and a contractor bids to install it. This creates a built-in gap: the designer doesn’t control the installation, and the installer didn’t influence the design. When issues arise — and on complex commercial HVAC, they always do — each side points to the other.
The result is change orders, schedule delays, and systems that meet the spec on paper but underperform in practice. Design-build closes this gap by putting design authority and installation accountability in one set of hands.
Designer and installer pointing at each other
Change orders from coordination gaps
Schedule delays between design and field
Systems that meet spec but underperform
What We Do
Design-Build HVAC: Unified Design and Construction
Design-build works because the designer and the builder are the same team. From schematic design through commissioning, one contract covers mechanical design, engineering, installation, and verification.
Commercial Office and Institutional
Full mechanical design-build for offices, schools, government facilities, and mixed-use developments. Load calculations, equipment selection, distribution design, and controls specification — all integrated with the architectural team from day one.
Healthcare and Lab Environments
Specialized design-build for facilities requiring precise environmental controls, redundancy, and code-driven ventilation. Cleanroom HVAC, surgical suite air handling, and lab exhaust systems.
Retail, Restaurant and Hospitality
Kitchen ventilation design-build, high-occupancy cooling, and make-up air systems engineered for the specific heat and moisture loads of food service and hospitality environments.
Industrial and Manufacturing
Process cooling, high-volume ventilation, and temperature-controlled environments designed and built for production requirements, not just comfort.
Why Circulating Air
Why Owners and GCs Choose Circulating Air for Design-Build
Six decades of commercial mechanical work in Los Angeles — we understand the local code environment, utility programs, and building conditions that affect mechanical design decisions. In-house engineering, project management, and installation crews. No subcontracted design, no outsourced installation. Named project experience includes LAUSD, UCLA, and major commercial property groups.
60
Years in Commercial HVAC
150+
Employees
Certified
NATE, STAR & TAB Certified Technicians
24/7
Emergency Dispatch
1 Year
Warranty on New Installs
Proven
UCLA, LAUSD, Westfield & 100s more
Ready to Eliminate the Design-Install Gap?
Free estimates. Honest assessments. No pressure.
How Design-Build HVAC Works
What to Expect
1
Programming and Schematic Design
We work with the owner and architect to define mechanical requirements, evaluate system options, and establish the design direction. Early involvement means HVAC drives the schedule instead of chasing it.
2
Design Development and Engineering
Detailed mechanical design, load calculations, equipment selection, and energy code compliance documentation. Value engineering integrated throughout — not bolted on after bid day.
3
Permitting and Installation
Mechanical permit applications, equipment submittals, and coordination drawings prepared by our PM. Ductwork, piping, equipment setting, and controls installation by our in-house crews.
4
Testing and Balancing
TAB-certified air and hydronic balancing to verify every zone meets design intent. Performance data documented for owner records.
5
Commissioning and Transition
Design-Build HVAC — Common Questions
What owners and developers ask when considering a single-source approach to HVAC design and installation.
What's the advantage of design-build over traditional design-bid-build for HVAC?
Single-source accountability. The team that designs the system also installs and commissions it, eliminating the coordination gap between engineer and contractor. This typically results in faster delivery, fewer change orders, and systems that perform closer to design intent because the designers understand constructibility and the builders understand the design rationale.
Do you provide engineering stamps on design-build mechanical drawings?
Yes. Our design-build projects include stamped mechanical engineering documents suitable for permit applications and construction. All engineering meets California Professional Engineer requirements.
Can we bring in design-build HVAC on a project that's already in architectural design?
How does design-build handle change orders compared to traditional delivery?
Design-build significantly reduces change orders because the team controlling the design also controls the budget and constructability assessment. When changes are needed, they’re resolved internally rather than triggering formal change orders between separate parties. Most design-build clients see 60–80% fewer mechanical change orders compared to traditional delivery.
Is design-build appropriate for complex facilities like healthcare or laboratories?
It’s often the preferred method for complex facilities precisely because it eliminates the designer-contractor gap. Healthcare HVAC requires precise coordination between air handling, pressurization, redundancy, and infection control — areas where the design and construction team being aligned from the start prevents costly rework.
What happens after the design-build project is complete?
Related Services
New Construction HVAC
Ground-up HVAC installation for commercial and institutional construction projects.
Tenant Improvements
HVAC design and installation for tenant build-outs and space renovations.
Commercial Installation
Equipment replacement and new installations for existing commercial facilities.
Service Agreements
Ongoing maintenance plans that preserve system performance after project completion.
Let's Build It Right
From design through commissioning — one team, one point of accountability. 60 years of commercial HVAC experience across Los Angeles.