Your G521216G700 has an adapter-fit replacement.
8,000 BTU/hr at 115V — the closest 115V option VoltAire builds. The capacity difference is spelled out below, in numbers.
Also sold as McLean · Hoffman · Pentair · nVent — G521216G700 — 12,000 BTU/hr · 115V · NEMA 4 · R-134A
Yours
G521216G700
Ours, in production
VoltAire AT08RMWXX
43.99″ H × 12.30″ D × 16.39″ W · 94.6 lbs
You'll order: 1× AT08RMWXX + 1× adapter plate — $4,313 total.
Verified fit path — so you're not the one explaining a wrong-fit order.
Where distributors publish pricing for the nVent equivalent, VoltAire runs 48% less on average — 21–70% by model (sourced July 2026).
Not a like-for-like — capacity step-down
Your G521216G700 is rated 12,000 BTU/hr at 115V. VoltAire doesn't build a 115V unit at that capacity. The closest 115V option, the AT08RMWXX, is 8,000 BTU/hr (about −33% cooling). If you can find a 115V 12,000 BTU/hr unit elsewhere, that's the true like-for-like — if you can't, this one fits with the adapter plate and runs on your voltage.
Your Replacement
AT08RMWXX
Adapter Fit8,000 BTU/hr • 115V • NEMA 4
−33% capacity vs your G521216G700 — the closest 115V option VoltAire builds. Not like-for-like.
Your order total
$4,313
Adapter plate included in this price.
Backed by VoltAire’s 12-month warranty (PDF) · UL 484 · Made in Orlando, FL
G521216G700
Where distributors publish pricing for the OEM equivalent, VoltAire runs 48% less on average (21-70% by model).
What You'll Order
Popular options
Screens sawdust, filings & insects off the condenser coil — not an enclosure air filter; cabinet air stays sealed.
Need a different voltage or capacity? Configure your AT08 / AT10 / AT12 →
Built to Order • 4-6 weeks
Fit Details
Adapter FitSame 115V supply as your G521216G700 — but 8,000 BTU/hr vs your 12,000 BTU/hr (see the capacity note above). Cabinet cutout dimensions differ, so an adapter plate is required to bridge the mounting pattern between the existing opening and the VoltAire AT08RMWXX — so you're not fabricating a new opening. Plan on some fitting work during the swap; we'll spec the exact adapter for your installation at order review.
Not sure? Talk to a fit specialist — (844) 925-5668.
G521216G700 replacement — common questions
What replaces the McLean G521216G700?
Will the VoltAire AT08RMWXX fit my G521216G700 cutout?
How much does a G521216G700 replacement cost?
How fast can I get a replacement for my G521216G700?
Is the VoltAire AT08RMWXX an original McLean part?
Why switch to VoltAire?
Engineered Replacement
Matched voltage and NEMA 4 protection, with the capacity difference stated in plain numbers above — with a clear fit path for your enclosure: direct, adapter plate, or template-guided modification. Built to replace McLean, Hoffman, Pentair, and nVent.
Built & Tested in the USA
Manufactured in Orlando, FL with a 5-point pressure and leak test. In-stock models ship fast from East Coast (VA) and Rocky Mountain (ID) warehouses; built-to-order configurations ship in 4-6 weeks.
48% Below Published Online Pricing, on Average
No distribution markup. Transparent pricing. Volume discounts at 4+ and 7+ units. Integrator pricing available for panel shops.
Need heat, stainless, 230V, or remote monitoring?
The AT08 is available with electric heat, stainless steel NEMA 4X, 48VDC, and factory ethernet controllers with Lead-Lag, SNMP, and BACnet.
Configure Your AT08 / AT10 / AT12 →Related models
VoltAire Cooling is an independent party and is not affiliated with or endorsed by McLean, Hoffman, Pentair, or nVent. All competitor brand names and model numbers are the property of their respective owners and are used here for identification and compatibility purposes only.