Diamond Contractor EliteMulti-Zone Design & Installation
Mitsubishi Multi-Zone Systems & Smart Controls
One outdoor unit, every room at its own temperature. Mitsubishi multi-zone heat pumps, air handlers and Comfort app controls — designed and installed across the San Francisco Peninsula.
One outdoor unit · Multiple zonesMitsubishi multi-zone heating and cooling, explained
A Mitsubishi multi-zone system connects one outdoor heat pump to several indoor units — wall-mounted, ceiling cassette, floor-mounted, ducted concealed or a multi-position air handler — so each room or floor can be heated and cooled to its own temperature. Homeowners control every zone from wall controllers or the Comfort app by Mitsubishi Electric (formerly kumo cloud®). Alternative HVAC Solutions designs and installs Mitsubishi multi-zone systems for Peninsula homes from Burlingame to Palo Alto.
How It Works
How a Mitsubishi multi-zone system works
One outdoor unit, many zones
Up to 8 indoor units on select models
Bedroom
Kitchen
Living
Kids’ rooms
One multi-zone outdoor unitEach zone has its own setpoint
Keep the nursery at 70°, the office at 72° and the guest room off — all on one system.
Mix ducted and ductless
Combine a ducted air handler for a whole floor with ductless units for additions, bonus rooms or problem spaces.
INVERTER efficiency
The outdoor compressor ramps to match only the zones calling for heating or cooling, instead of running the whole house.
Air Handlers & Indoor Units
Mitsubishi air handlers and indoor units you can combine
Multi-position air handler
A ducted Mitsubishi air handler installs in an attic, closet, garage or crawlspace and serves an entire floor through existing or new ductwork — the backbone of many multi-zone systems.
Ducted concealed units
Compact horizontal units hide in a soffit or attic and serve two or three adjoining rooms through short duct runs, with only small grilles visible.
Ductless wall, cassette & floor units
Wall-mounted, recessed ceiling cassette and floor-mounted units add individual zones wherever ducts can’t reach.
Smart Controls
Control every zone with the Mitsubishi Comfort app
The Comfort app by Mitsubishi Electric replaced kumo cloud® as Mitsubishi’s smart-home app. It works with existing Mitsubishi systems and new units with built-in Wi-Fi.
- Set temperature, mode and fan speed for each zone from your phone
- Seasonal schedules — separate summer and winter programs you can switch with the weather
- Control multiple indoor units in your home from one app
- Comfort Connect links you to your contractor for setup and service requests
Prefer a wall control? Mitsubishi wired and wireless wall controllers give each zone a simple thermostat — wireless models mount anywhere without running new wire.
Already using kumo cloud®? We can help move your system to the Comfort app.
Why Zone
Multi-zone vs. a single thermostat
| One thermostat, one system | Mitsubishi multi-zone | |
|---|---|---|
| Temperature control | One setting for the whole house | Each zone set independently |
| Hot and cold rooms | Upstairs too hot, far rooms too cold | Every room conditioned to its own need |
| Empty rooms | Heated and cooled anyway | Turned off when not in use |
| Equipment | Often a furnace plus a separate AC | One all-electric heat pump heats and cools |
Multi-Zone FAQ
Mitsubishi multi-zone & controls FAQs
What is a Mitsubishi multi-zone system?
A Mitsubishi multi-zone system connects one outdoor heat pump to several indoor units so different rooms or floors can be heated and cooled to their own temperatures. Indoor units can be ductless, ducted or a mix of both.
How many zones can one Mitsubishi outdoor unit serve?
Select Mitsubishi multi-zone outdoor units connect up to eight indoor units. The right number depends on the outdoor unit model and the combined capacity of the indoor units, which we size during your in-home assessment.
Can I mix ducted and ductless units on one system?
Yes. A Mitsubishi multi-zone system can combine a ducted air handler or ducted concealed units with ductless wall, ceiling cassette or floor-mounted units on the same outdoor unit.
What is a multi-position air handler?
It is a ducted indoor unit that can be installed upright, horizontally or downflow — in a closet, attic, garage or crawlspace — to deliver heating and cooling to a whole floor through ductwork.
What happened to the kumo cloud app?
Mitsubishi Electric replaced kumo cloud® with the Comfort app by Mitsubishi Electric. The Comfort app works with existing Mitsubishi systems and new units with built-in Wi-Fi, and we can help move your system to it.
Can I control each zone from my phone?
Yes. The Comfort app by Mitsubishi Electric lets you set temperature, mode and schedules for each indoor unit from a smartphone, including separate seasonal schedules for summer and winter.
Do I need a thermostat in every room?
Each zone needs a control. That can be the handheld remote, a Mitsubishi wired or wireless wall controller, or the Comfort app — most homeowners use a combination.
Is a multi-zone system more efficient than central air?
It can be. Multi-zone systems condition only the rooms in use, avoid duct losses for ductless zones, and use INVERTER compressors that ramp to the actual load instead of cycling on and off.
Can I add zones later?
Often, yes, if the outdoor unit has available connections and capacity. Planning for future zones — such as an addition or ADU — during the original design makes later expansion simpler.
Do you service existing Mitsubishi multi-zone systems?
Yes. We service, maintain and upgrade Mitsubishi multi-zone systems across the Peninsula, including controls upgrades and app setup.
Get a Mitsubishi multi-zone estimate
Tell us which rooms and floors need attention. We’ll design a Mitsubishi multi-zone system, choose the right indoor units and set up your controls.
- No-pressure, written proposal
- Rebate paperwork help
- 12-year warranty on qualifying installs*
