Resources
Guides & technical resources
In-depth guides on sizing, selection, compliance, and competitive comparison — plus interactive calculators — written by VoltAire’s engineering team for facilities managers, controls engineers, and panel shops.
Interactive Tools
Calculators & selectors
Size a unit, project lifetime cost, and pick the right enclosure rating — right in your browser.
How to size a unit
Interactive sizing walkthrough — enter your heat load, ambient, and target temperature and get the BTU/hr and a recommended model.
Open the sizing tool10-year TCO calculator
Compare 10-year total cost of ownership — energy, maintenance, and upfront price — across cooling options.
Open the calculatorNEMA rating selector
Answer a few questions about your environment and get the right NEMA enclosure rating for the job.
Open the selectorGuides & Reference
Read up before you spec
Vendor-neutral technical guides, compliance references, and quick lookups.
Fundamentals
The complete guide to enclosure air conditioning
Heat-load math, sizing, NEMA ratings, and how to cross over from a McLean, Hoffman, or nVent unit — start here.
Read the guideComparison
VoltAire vs. nVent (McLean / Hoffman / Pentair)
Side-by-side comparison: same NEMA 4/4X rating, same UL listing, bolt-for-bolt fit — at a lower price.
Read the guideCompliance
BABA compliance for enclosure cooling
Build America, Buy America requirements and how VoltAire qualifies for federally funded infrastructure projects.
Read the guideCompliance
GR-487 compliance for telecom cooling
Telcordia GR-487 / NEBS environmental and mechanical requirements for outdoor telecom enclosures.
Read the guideCompliance
Refrigerant & GWP: R-134a → R-513A
What GWP ≤ 700 screens mean for enclosure cooling, VoltAire’s planned R-513A transition by end of 2026, and refrigerant-free options that pass today.
Read the guideReference
Industry glossary
Plain-English definitions of the enclosure-cooling, NEMA, and HVAC terms used across the site.
Read the guideReference
Competitor cross-reference
Find the VoltAire replacement for a McLean, Hoffman, Pentair, or nVent model number.
Read the guideNot sure which unit you need?
Our engineering team can size a unit, confirm a replacement, or talk through a compliance requirement.