Custom Air Conditioning Enclosure for Large HVAC Outdoor Units

As a manufacturer’s representative for air conditioning products, this customer regularly specifies and sells outdoor pump packages as part of larger HVAC systems. Most of those packages are small — dual-pump units between two and 10 horsepower with a footprint of roughly 2'x3'. An off-the-shelf aluminum enclosure can handle those.

The challenge arises with the larger jobs. Occasionally, this customer works with duplex and triplex pump packages running at 20, 30, 40 and sometimes 50 horsepower. These outside units are mechanically complex, physically large and not something a standard catalog product is built to protect.

Two requirements drove the enclosure specification on every large project: weather protection across all seasons and noise reduction. Large pump packages generate significant sound — enough that enclosure sound dampening is often a baseline requirement on commercial installations. Exposure to rain and winter freeze cycles makes an unprotected outdoor unit a liability.

The assumption most engineers and project managers carry into custom enclosure conversations is that custom means expensive and slow. In practice, that’s rarely true when the manufacturer uses a modular aluminum design.

Safe-T-Cover’s modular construction approach makes it practical to customize dimensions, access configurations, penetrations and climate control features without the cost premiums or extended lead times associated with one-off fabrication.

Because the system is engineered for adaptability, the move from a standard enclosure to a fully custom air conditioning pump enclosure is more straightforward than most buyers expect. The same modularity that simplifies engineering also makes on-site assembly easier — panels fit together predictably, and the installation process doesn’t require specialized tools.

For large enclosures, the modular design also solves a logistics problem. Units that approach the footprint of a small garage can’t reasonably ship assembled. A flat-pack approach — made possible by the modular panel system — reduces freight costs significantly and simplifies delivery and on-site assembly. Color and finish options, including standard white and a range of custom colors, let the enclosure match the surrounding building or outdoor area without a separate finishing step.

For this customer’s large pump packages, Safe-T-Cover designed custom aluminum enclosures configured to protect each outdoor unit from the elements, reduce noise and accommodate the access needs of a working HVAC installation. Each unit was built to withstand winter freeze conditions and summer heat without degraded performance.

Key specifications and features included:

• Insulation and slab-mounted heaters to maintain operating temperatures through winter and extend equipment life
• Exhaust fans and louvers sized for adequate airflow and thermal management in summer
• Removable and hinged panels for multi-side maintenance access
• Custom cutouts for process piping and supply and return line penetrations
• Skid or slab mounting configurations
• Color and finish options to match the building or outdoor space

The large enclosures on these jobs are substantial structures, comparable in scale to a small garage. Designing for maintainability meant including access from multiple sides, with removable panels that let service crews reach the AC unit and surrounding equipment without obstruction. That level of access planning is a standard part of Safe-T-Cover’s engineering process on large pump packages.

This customer first connected with Safe-T-Cover through a pump manufacturer he works with as a representative. The relationship started with the large, custom pump packages. The result was a long-term working relationship.

The result was a long-term working relationship. The enclosures performed as specified in the field: seasonal climate control held, sound dampening met project requirements and access for maintenance was straightforward. The customer found the process reliable — communication, documentation and construction quality — and kept coming back without worry.

That consistency is what led him to expand use of Safe-T-Cover’s products to the smaller end of his work as well. He now evaluates Safe-T-Cover standard-size aluminum enclosures for the 2–10 HP dual pump packages that make up the majority of his volume.