Gyms, theaters and shops: the secondary-campus building mix
A secondary campus is a collection of very different rooms under one fence line. The mechanical question is rarely 'how old is the campus' and more often 'which space is failing, and how does it interact with the rest.' The table below is how we think about the usual space types when we walk a school of this kind.
| Space | Typical equipment | What tends to go wrong |
|---|---|---|
| Gymnasium and locker rooms | Large rooftop or suspended units, exhaust fans, domestic hot water | High-volume air that is hard to condition; humidity and odor in locker rooms; water heater scale |
| Theater or performing-arts space | Dedicated air handler or packaged unit, quiet-duct requirements | Noise complaints, poor distribution, units shared with lobbies and dressing rooms |
| Career-technical shops | Dust and fume exhaust, make-up air | Exhaust and make-up air out of balance, leaving rooms negative with doors hard to open |
| Cafeteria and culinary rooms | Walk-in cooler or freezer, reach-ins, ice, kitchen exhaust and make-up air | Condenser fouling, door gaskets, drain lines, exhaust that fights the dining area |
| Classroom wings | Rooftop packaged units or wall-mounted units, thermostats | Uneven comfort, stuck dampers, schedule drift on the controls |
| Administration and library | Split systems or packaged units on longer schedules | Run time far beyond the instructional day; early compressor wear |
Because the district's campuses serve older students, the sheer size of individual buildings is larger than at most elementary sites. That favors rooftop equipment sized in the larger tonnages, which in turn means crane scheduling, rooftop screening and structural verification show up in the project plan earlier than they would on a small campus.
How a secondary district buys mechanical work
California school districts generally buy construction work under the Public Contract Code, which sets competitive-bidding requirements above statutory thresholds. Below those thresholds, districts commonly use informal quotes, and for repeating needs they may set up on-call or master agreements with pre-qualified contractors. Some districts also use job-order-contract style vehicles or cooperative purchasing contracts, which let a district use a pricing arrangement another public agency has already competed. Which of these a given district uses, and at what dollar thresholds, changes over time, so confirm current requirements with the agency.
For this district, start at the purchasing or business-services pages and the facilities, maintenance and operations pages. Look for three things: whether the district posts bids on its own site or a hosted portal, whether it keeps a pre-qualified or approved-contractor list that you apply to separately, and whether any multi-year on-call pool is open for applications. Our public agency and school HVAC procurement guide walks through those mechanisms in more detail, and the K-12 sector overview covers what is common across districts.
A competitive bid that is posted publicly has a hard deadline, a mandatory job walk in many cases, and addenda that change scope. Missing one addendum is the most common way a qualified contractor ends up non-responsive.
Scheduling realities for a secondary campus
Summer is the main window for anything that takes classrooms offline, but secondary campuses have a wrinkle the elementary world does not: summer school, athletics conditioning, band and marching programs, and sports camps can keep a gym, a locker room or a theater active well into July. A rooftop replacement over the gym may be easy to schedule on paper and impossible in practice if the building is hosting summer programs.
School-year work is possible when it is isolated: a rooftop unit swap on a building whose classrooms can be temporarily relocated, an after-hours kitchen refrigeration repair, or a weekend crane pick. Expect the district to ask for work during evenings, weekends and breaks, and to want noisy or disruptive tasks sequenced away from testing windows and major events. Build a calendar with the facilities contact before you price anything, because the dates that are truly available drive crew size and equipment lead-time decisions.
Paperwork on a public school job
School construction in California sits under the Division of the State Architect for many alterations, particularly where structure, accessibility or fire and life safety are touched. A like-for-like rooftop replacement may or may not require DSA review depending on how the curb, structure and anchorage are affected; the district's architect or DSA-certified inspector of record will tell you, and you should not assume either way.
- Public-works registration with the Department of Industrial Relations and prevailing-wage compliance, including certified payroll submitted as the awarding body requires.
- Contractor license verification, workers' compensation and general liability insurance, usually with the district named as additional insured. Bonds where the bid documents call for them.
- Fingerprinting or background clearance for personnel who may be on campus while students are present. Requirements and timing vary, so ask early.
- Title 24 acceptance testing and documentation where the work triggers it, and refrigerant handling records consistent with current state rules.
Davinci Mechanical holds California contractor license #1083101, uses UA Local 250 union labor, and is prepared for PLA and prevailing-wage work with certified payroll. We confirm each agency's specific registration and paperwork requirements before pursuing a bid, and we meet them as that bid requires. See our prevailing wage guide for how that works in practice.
Where mechanical work shows up most on campuses like these
- Packaged rooftop units serving classroom wings, gyms and multipurpose rooms, as replacements and as repairs of aging compressors and economizers. See RTU and split installs.
- Cafeteria and culinary refrigeration, including walk-in coolers and freezers and reach-ins. See refrigeration and coolers.
- Ice machines serving athletics and training rooms as well as food service. See ice machines.
- Water heaters for locker rooms and kitchens, where scale and recirculation problems are the usual culprits. See commercial water heaters.
- Kitchen ventilation and make-up air, where imbalance affects both comfort and kitchen performance. See kitchen ventilation.
- Controls and schedules, where drift quietly wastes run time. See building controls.
Portable classrooms are a separate category on most campuses. They usually carry wall-mounted heat-pump style units that fail more often than a built-up system and deserve their own inspection routine.
Our approach to secondary-campus scopes
We are a commercial-only contractor, the union commercial division of Scottish Tom's Heating & Air, based in Orange County. On a campus, that means we send people who understand that a school is a working building with a schedule. We diagnose the cause of a failure instead of replacing parts until the complaint goes quiet, and we record what we find. Every serviced asset gets an entry in the DaVinci Portal, with service history, readings and photos, so the person who inherits the equipment next year is not starting from zero.
We are interested in bid-level and project work, not one-off cheap fixes. For districts building or renewing maintenance coverage, our maintenance plans give a defined cadence by equipment type. If you want a second set of eyes on a failing unit before a district commits to a replacement, the second-opinion diagnostic exists for that.
Information that makes a bid package answerable
- The bid documents or scope, including all addenda and the DSA application number if one exists.
- Site name, building and room numbers, and the age and model plates of the equipment if you have them.
- The available work windows, and any athletics, testing or summer-program blackout dates.
- Access rules: badging, fingerprint clearance, escort requirements, parking and laydown area for a crane.
- The submittal and closeout requirements, including as-builts and warranty documentation.
If you are an architect, program manager or general contractor putting together a bid package that includes mechanical, start with our bid projects page and call (714) 594-9194.
Frequently asked questions
Which Anaheim Union spaces cause the most mechanical trouble?
Gyms, theaters and shop exhaust. Gyms because of volume and humidity, theaters because of noise and shared units, shops because exhaust and make-up air drift out of balance. Those are the first places to ask about on a walk.
Is the district's purchasing process different because it only serves secondary grades?
The legal framework is the same as for other California school districts. What differs is the work itself: larger buildings, gyms, theaters and shops. Check the district's purchasing pages for its current thresholds and portal.
Can you work around summer programs and athletics?
Yes, if we know the calendar early. We plan crew and crane dates around the windows the facilities team can actually give us.
Will DSA approval be needed for a rooftop replacement?
It depends on how the structure, curb and anchorage are affected. The district's architect or inspector of record decides; we build the schedule to allow for the review if it applies.