A
Plenum-to-equipment transitions
The piece that lets a new air handler bolt onto an existing plenum cleanly. Sized to preserve the system's static pressure budget.
When off-the-shelf doesn't fit, we make what does.
In-house custom sheet metal fabrication for adobe homes, mobile homes, additions, and any retrofit where stock transitions and trunks don't work. Cut to fit, mastic-sealed, built to survive the attic heat.
When fabrication matters
If your home is any of these, off-the-shelf parts will compromise the install.
A duct system is only as good as its weakest transition. We'd rather make the part right than force a stock piece into a place it doesn't belong.
Adobe or historic Mesilla home
Thick walls and non-standard ceiling heights mean stock plenums and trunks rarely fit. Fabricated transitions are routine here.
Mobile home crossover or rooftop unit
Mobile-home duct geometry is its own world. Crossover transitions and rooftop curb adapters get fabricated to match.
Addition or converted garage
The original system was sized for the original house. We fabricate transitions and tap-ins to extend it without choking the existing supply.
New equipment, old plenum
New furnace and AC almost never bolt straight onto the existing plenum. The fabricated transition is what makes the swap fit.
Tight attic, crawlspace, or knee wall
Standard parts don't make tight turns. Custom transitions and shorter, properly-sized boots are how we keep airflow on a tight retrofit.
What we fabricate
Built for the install, not pulled from a shelf.
B
Custom trunks and branches
For adobe ceilings, knee walls, and tight chases where standard trunk sizes won't pass. Cut, formed, and sealed in our shop.
C
Boots, takeoffs, and end caps
Where the supply meets the register. Right-sized boots are a small part with a big airflow impact.
D
Roof curbs and adapters
For rooftop units on mobile homes and small commercial. Adapters fabricated to existing curb dimensions.
E
Filter racks and access doors
Filter racks sized for the actual filter you can buy locally, not whatever shipped with the air handler. Hinged access doors where serviceability matters.
F
Mastic-sealed assemblies
Every joint sealed with water-based mastic, not foil tape. Foil tape fails in attic heat. Mastic doesn't.
How fabrication fits in
From measurement to installed part.
1
On-site measurement.
Existing plenum, ductwork, framing, and clearances measured. Photos taken. Airflow target documented.
2
Shop fabrication.
Galvanized cut, formed, and assembled to spec. Joints prepped for mastic seal.
3
Install on site.
Part trial-fit, adjusted on the spot if the framing surprises us, mastic-sealed at every joint.
4
Verify airflow.
Static pressure and register airflow re-checked after install. The fabricated piece has to make the system better, not just fit.
Frequently asked
Sheet metal questions, answered.
Why fabricate in-house instead of using off-the-shelf?
Adobe homes, historic Mesilla properties, mobile homes, and additions almost never accept stock transitions. Forcing an off-the-shelf piece into a place it doesn't belong creates static pressure problems and noisy registers. Fabricating in-house means the install fits right the first time and the airflow design isn't compromised by what the supply house had on the shelf that morning.
Do you only fabricate for jobs you install?
Mostly. Sheet metal is part of our install and retrofit work, not a standalone product line. We'll occasionally take on fabrication for trade partners on a case-by-case basis if it pairs with a job we're doing.
What gauge and material do you use?
Standard 26-gauge galvanized for most residential trunks and transitions. Heavier gauge where vibration, span, or pressure call for it. Mastic-sealed joints throughout, no foil tape on anything that lives in an attic, because foil tape's adhesive fails in attic heat and the joint comes apart.
Can you match my existing plenum exactly?
Yes. We measure the existing plenum on site, fabricate the transition to match the existing geometry and the new equipment's flange, and install. No "close enough" gaps, no compromise on airflow.
How does this affect cost?
On most retrofits, fabricated transitions cost a little more than stock parts up front and save more than that in airflow performance, fewer callbacks, and longer-lived ductwork. We line-item it on the quote so you can see exactly what the fabrication adds.
Do you do commercial sheet metal work?
Light commercial, small office, retail, restaurant rooftops, yes, on a case-by-case basis. Larger commercial work isn't our focus, and we'll point you to the right contractor for it.
What customers say
Recent custom installs.
"I can't say enough wonderful things about Angel. His work is impeccable."
Lou Martinez · Google Review
"Angel was amazing, easy to talk to, and super responsive. He answered all my questions explaining what's going on with the unit and what the fix was as he did it."
Mileena Sanchez · Google Review
"Best service in town! Came out earlier than the ETA, quickly diagnosed the problem AND had all the needed parts on hand."
Josh Miranda · Google Review