Zone Theory Climate Co. · Zoning, controls & ventilation science · Pellworth, Grange Heights & the Millyard · Lic. HV-6608
One thermostat is a coin flip. Eight zones is a science.
We fix the house that fights itself: bedrooms over garages, west-facing kitchens that cook at 4 p.m., finished basements that never agree with the floor above. Damper-by-damper zoning, sensor-driven controls and balanced heat-recovery ventilation — designed on paper, proven by the numbers, and warrantied as a system.
2,140 zone systems commissioned · Manual J on every design · sensors calibrated to ±0.5°F · (555) 926-4178
THE AUDIT GUARANTEE: the zone audit ends with a temperature map of your house and a design you can hand to any installer. If our design does not close the spread it promised, the commissioning visit is free.
Services & rates
The spec sheet, published.
A controls company that hides its prices is doing controls wrong. Every line is the installed figure — design, panel, dampers, wiring and the commissioning report that proves the spread closed.
Zone audit & temperature map$210
Seventy-two hours of logged room data, then the design
Two-zone retrofit, damper-drivenfrom $2,850
Panels, dampers, thermostats — design included
Multi-zone system, up to eight zonesfrom $5,900
Each room its own setpoint and schedule
Heat-recovery ventilator, balancedfrom $3,400
HRV installed, commissioned and documented
Controls & sensor packagefrom $740
Smart schedules, humidity, remote monitoring
Seasonal balancing visit$129
Dampers re-verified, sensors recalibrated
Most “problem rooms” are control problems wearing an equipment costume. The audit exists to find out which one yours is before anyone sells you a compressor.
The commissioning path
From coin flip to closed loop
Four passes, the same every time — because a zone system is an instrument, and instruments are built to procedure.
The audit
Sensors in every problem room for seventy-two hours: when it drifts, by how much, and against what the thermostat claimed was happening.
The design
Manual J per room, damper schedule drawn, control logic written — a document you can hand to any installer in the country.
The build
Dampers and panel installed, sensors placed where the audit says air actually lives, wiring labelled for the next decade of service.
The proof
The same sensors, re-logged after commissioning. The spread that motivated the call goes on the report — closed, in writing, or the visit is free.
Room-by-room zoning
Damper motors on a designed schedule: the bedroom sleeps at 66 while the kitchen holds 70 through the afternoon sun, and nobody touches a thermostat to do it.
Controls that earn their screen
Schedules, humidity, setbacks that respect thermal mass — wired so the schedule survives a power cut and the logic survives the next owner.
Ventilation, balanced
HRVs commissioned with a spreadsheet, not a guess: supply and exhaust matched to the room, so fresh air arrives without arriving as a draft.
Selected systems
The commissioning book
Three companies bid us a new furnace, a bigger furnace and the biggest furnace. Zone Theory logged our house for a weekend, zoned the ducts we already owned, and the room that started this is now the warmest one in January. The furnace never changed.
The temperature map was the moment. Seeing the west rooms hit 79° while the east sat at 68 — on one thermostat — ended a decade of thermostat warfare in this house.
Our HRV was installed by the builder and never balanced. Zone Theory measured it, matched supply to exhaust per room, and the upstairs stopped feeling like a wind tunnel with the windows shut.
They designed it, documented it, then handed me the drawings and said any installer could execute it. I hired them instead — but I have never been trusted with the paper like that before.
Asked with the map open
Can my existing system be zoned?
Usually, yes — that is the finding seven audits in ten reach. If the duct trunk can carry it, dampers and a panel convert one coin-flip system into a designed one for a fraction of new equipment. If it cannot, the audit will say so before a single damper is ordered.
What does the temperature map actually show?
Seventy-two hours of logged data per room, overlaid: which rooms drift, when, by how much, and against what the thermostat believed. It converts “the bedroom is cold” into “the bedroom runs 6°F under setpoint from 2 to 5 a.m.” — a sentence a design can answer.
Why zone before replacing equipment?
Because comfort complaints are usually distribution complaints. A right-sized, zoned system on sound ducts beats an oversized replacement on bad ones — and if replacement does become the honest answer, the zone design makes the new equipment smaller, cheaper to run and longer-lived.
What is an HRV and why does balancing matter?
A heat-recovery ventilator brings fresh air in and exhausts stale air while recovering most of the heat between the streams. Balanced badly, it pressurises some rooms and starves others — the exact problem it was bought to solve. Commissioned to the sheet, it is invisible, silent and worth every degree it recovers.
Do you sell thermostats and smart home gear?
We sell outcomes that happen to include hardware. The controls package is specified by the design — schedules, sensors, humidity logic — and the equipment list names what each part does. Nothing is in the quote because it connects to an app.
Stop negotiating with your thermostat.
The audit is a fixed price and the map is yours whoever installs the design.
Zone Theory Climate Co. · 44 Millyard Lane, Pellworth · maps@zonetheory.example