Custom HVAC- soundbloc enclosures

Who asks us for these enclosures

The calls we get usually start with a complaint. A facilities manager in San Antonio had rooftop units sitting close to a neighbor’s property line. A developer in Raleigh kept hearing from ground-floor tenants about side-yard condensers every move-in season. A restaurant owner in Chattanooga had condensers on the roof right above the outdoor patio, and guests noticed the hum whenever the dining room got quiet. An architect in Austin was designing a rooftop mechanical yard on a mixed-use building, and because the condensers sat close to apartments next door, local rules called for both visual and acoustic screening.

Different buildings, same story. The equipment has to stay where it is, it has to keep breathing, and somebody still needs to service it twice a year. What the owner wants is for the noise to stop being a topic, and for the box around the unit not to look like an afterthought.

That’s why most of our clients fall into a few groups: developers and property managers of multi-family buildings, HOA boards, architects working on rooftop mechanical yards, general contractors who need mechanical screening on commercial jobs, and homeowners whose condenser or pool pump sits a few feet from the patio.

Why don’t standard enclosures work?

Most standard noise-reduction solutions, from open hvac screens to heavy masonry walls, have two critical drawbacks:

• Weight and size. Concrete or metal sides require sturdy foundations. Placing enclosures on a terrace or flat roof overloads the load-bearing structures.
• Material degradation. Many options suffer from this issue as well. Wood dries out, plastic cracks under UV exposure, and the mesh in EIFS systems can delaminate due to equipment vibrations.

There’s a practical side to this, too. Block enclosures built on site take crew time, curing time, and a few trips back to fix what didn’t line up. One contractor in Columbus told us our panels went together faster than the block enclosures his team used to build, mostly because they arrived already sized to the equipment footprint. Our panels are about 90% lighter than concrete sound walls, which matters a lot once you start putting them on a roof.

Our choice of material combination (EPS + mineral wool + polyurea) absorbs a wide spectrum of sound waves, effectively functioning as a sound silencer and adding a layer of HVAC sound insulation around the unit.

Analyzing effectiveness by layer

We design our soundproof enclosures as architectural elements built to last for decades. Here’s what they consist of:

• Core. It consists of high-density architectural EPS. Unlike standard enclosures, we tailor the design to the specific conditions of each site, sizing every acoustic enclosure to the specific air conditioner, compressor, or pool pump. We include the necessary channels for proper hot-air exhaust, without compromising acoustic performance, and without blocking the unit’s HVAC vents.
• Protective coating. The surface is protected from moisture and UV exposure with a 6–8 mm thick industrial polyurea coating. The coating is high density and viscosity, which results in less structural vibrations in the equipment. Unlike standard paints or mesh, polyurea does not crack due to thermal expansion.
• Acoustics. We take advantage of the opportunity to engineer the shape to minimize wind resistance. This is important because a properly calculated hull geometry creates an acoustic trap, preventing sound from propagating directly.
• Service access. Access panels can be built into the enclosure, so service technicians can reach the equipment without dismantling it.

What an enclosure can and can’t do about noise

We’d rather be straight about this part. The enclosure walls carry an STC 38–40+ rating, but a condenser still needs open air to run, so the box can never be sealed like a studio. The sound that people notice most is the part that travels in a straight line from the fan and compressor to a window, a patio, or the property line. Blocking that line is where an enclosure does its job as an HVAC sound trap.

So the actual HVAC sound reduction you get on site depends on the unit, how close the listeners are, and what’s around it. A wall of the building behind the condenser can bounce sound back toward the neighbors. A gap under the panels can let it leak out. We look at these details before we draw anything, and that’s also why we ask for photos of the spot, not just the model number.

In the projects we’ve done, the result people describe is simple: the complaint goes away. An HOA board in Myrtle Beach, SC, had residents near the clubhouse’s mechanical yard complaining about condenser noise for a couple of summers. After the enclosure went in, the issue dropped off the board’s agenda. A property manager in Overland Park, KS, had a generator and condensers that were both loud and visible from the street, and one enclosure took care of both.

Compliance with building codes

Our HVAC enclosures are designed in accordance with current ASTM standards. We specifically adapt components to non-standard installation conditions, including wind loads and fire resistance requirements (Class A per ASTM E84). This makes our products ideal for modern development projects, where not only quiet operation but also the legal soundness of all decisions is crucial.

Sizes, styles, and finishes

Standard sizes run from 4 to 24 feet in length and from 48 to 72 inches in height, and we have more than 30 design options to start from, from plain stacked panels to fluted and spiral profiles. If none of them fits, we make the enclosure to your drawing.

The finish is where the enclosure stops looking like equipment. We can make the panels look like stone, brick, or stucco, and we offer a range of textures, including Sandblast, Freestyle, Quarzputz, Sandpebble, Sandpebble Fine, Mojave, Finesse, Coral, and Coral Light. Most clients match the enclosure to the wall right behind it. On a stucco house, that usually means the same texture and color as the facade, so from the street the box reads as part of the building.

Pool equipment enclosures

Pool pumps and filters have the same problem as condensers, just closer to where people actually sit. A homeowner in Sarasota, FL, had the pool equipment and condenser right next to the patio where the family entertains, and the hum was hard to ignore over dinner. Putting them behind a modern pool equipment enclosure noticeably cut down what they hear from the patio.

For pool equipment, we plan the enclosure around the plumbing and the valves, since those are what the pool service company needs to reach every week. Access panels go on the side the technician will actually use. The EPS core doesn’t absorb water, and the polyurea coat handles splashes, sprinklers, and sun without peeling.

This matters most in HOA communities, where outdoor condensers and pool pumps often need to be screened from view. For HOA community projects, see also our subdivision entrance designs kits.

Before you order: what to measure

A good quote starts with good numbers. Here’s what we usually ask for:

• Measure the unit’s length, width, and height, and include the pipes, the electrical disconnect, and anything else that sticks out.
• Write down the brand and model number as well, since the spec sheet shows us where the unit pulls air in and pushes it out.
• Check the installation manual for the service clearance the manufacturer recommends around the unit; the enclosure has to respect it.
• Take photos of the spot from a few sides, plus one from where the noise bothers people most, whether that’s a bedroom window, a patio, or the neighbor’s fence.
• Tell us if the unit sits on a roof, a slab, or a pad, and whether the enclosure needs to match an existing finish.

If you already have drawings, send them in whatever form you have: CAD files, BIM models, permit sets, marked-up PDFs, or a hand sketch with dimensions all work for us. Not sure about a number? A photo with a tape measure in the frame helps us more than a guess.

How an order moves through our shop

First, we go through your plans and photos with you and agree on scope, size, and finish. Then we prepare a 3D visualization and an itemized proposal, so you can see what you’re paying for before anything is cut. Nothing goes into production until you approve it. Design support is free on every project, and one project manager stays with you from the first call to delivery.

The enclosures are cut on CNC equipment in our 45,000 sq. ft. workshop, coated with polyurea, and checked before they leave. After approval, production usually takes 2–5 days. The panels ship in custom crates, pre-assembled where possible, and if your crew has questions during installation, we can walk them through it on Zoom.

Professionals choose us

Transparency in all processes with no hidden conditions — this is one of the main reasons why architects and developers are eager to work with us. You’ll know exactly what we do and how we do it, and why the result will last for many years. Our products make a property more marketable and comfortable: the box integrates into the facade, becoming a stylish decorative element rather than just a technical component. The enclosures come with a 20-year structural warranty.

We always take full responsibility for the outcome, so when you choose Decorative Architectural Shapes, you’re choosing a conscientious partner who works with integrity and values its reputation. We create an architectural environment where engineering systems operate discreetly and efficiently.

Got a noisy unit and a photo of it? Send them our way and request a free quote. Our engineers will look at the site and suggest a layout that fits both the look of the building and your outdoor noise control needs.