VRX Reverse Polarity · Multi-Zone Electrification
All‑electric replacement for multi‑zone gas/electric rooftops with eight zones or more — heating some zones while cooling others, at the same time, on the connected power the building already has.
01 / The trap
A conventional all‑electric conversion is sized as though every zone might demand full heating and full cooling in the same moment. Design for that and you end up with something close to two full‑capacity systems, and an electrical ask that roughly doubles.
Real multi‑zone buildings do not behave that way. When most of the building wants cooling, a minority of zones want heat. In winter it reverses. The simultaneous worst case that drives the electrical design is a condition the building almost never actually reaches — but you pay for it in feeder, breaker, switchgear and utility service anyway.
Reverse Polarity is built around what the building actually does, not around the worst case a spreadsheet can imagine.
02 / Watch it happen
03 / What the occupants get
Zones calling for cooling get cooling. Zones calling for heating get heating. At the same time, from one unit, through the thermostats already on the wall.
That is the part occupants notice and the part facilities stops getting called about. No one in the building has to learn a new system, adjust their expectations, or accept that their corner of the floor is simply the side that loses in shoulder season.
04 / What the electrical room gets
That is the whole point. Reverse Polarity is engineered to land inside the connected power of the gas/electric unit it replaces — so the electrical scope of the project is, as far as the service is concerned, unchanged.
No new feeder to pull. No breaker to upsize. No switchgear decision. No utility service application, and no interconnection date sitting on your critical path that you do not control.
05 / What the project skips
The zone dampers stay where they are and stay wired the way they are.
No second full‑capacity system to buy, rig, find roof space for, or maintain for twenty years.
Built around the opening that is already there, so the building is opened as little as the geometry allows.
06 / Where it applies
Units reaching end of useful life in occupied buildings, where the decarbonization plan has stalled because the electrical service cannot take a conventional conversion.
New multi‑zone applications where holding down connected load is worth more than the simplicity of oversizing, and simultaneous heating and cooling is a real operating condition.
Applies to multi‑zone units with zone dampers in the unit itself rather than remote terminal boxes. Fewer than eight zones? Pressure De-Coupled is usually the better fit. Dual deck? Look at PowerGuard.
07 / Patent pending
Reverse Polarity is the subject of a United States patent application. What it delivers — simultaneous heating and cooling across many zones, all‑electric, inside the existing service — is what a website can usefully tell you.
How it does that is what we walk your engineer through, on your equipment schedule, in a meeting. That is not evasion; it is the part worth your engineer’s time and ours.
We will not tell you a product is code‑compliant. Adoption, amendments and local enforcement vary, and every project needs its own engineering validation and authority review.
A multi-zone gas/electric unit, its zone count, and what the electrical room has left. We will tell you whether Reverse Polarity fits and what the connected load looks like when it is done.