One room
A bedroom, office or other individual comfort problem. The one-zone configuration uses one indoor unit with the matched outdoor equipment.
Discuss one room
Practical system configuration guide
Plan the rooms.
Then plan the system.
One-, two- and three-zone descriptions explain a matched arrangement. They do not tell us how many units your building needs. We start with the rooms and their heating and cooling loads.
Three useful starting points
How many rooms are you discussing?
Two rooms
Two indoor units share compatible outdoor equipment. The two-zone match has different ratings from the one-head arrangement on the same outdoor model.
Discuss two roomsThree rooms
The three-zone outdoor model serves a compatible two- or three-head combination. The table below describes the three-zone rated match.
Discuss three roomsMore rooms can require multiple outdoor units. A room count is a conversation starter, not a design selection.
Matched performance
Keep the rating with the configuration.
| Configuration | One zone | Two zones | Three zones |
|---|---|---|---|
| Connected rooms | 1 | 2 | 3 |
| SEER2 | 21 | 25 | 25.3 |
| HSPF2 • Region IV | 10 | 12 | 12 |
| Rated cooling at 95°F | 8,000 BTU/h | 16,000 BTU/h | 24,000 BTU/h |
| Rated heating at 47°F | 9,000 BTU/h | 18,000 BTU/h | 27,000 BTU/h |
| Heating capacity at 5°F | 12,000 BTU/h | 18,000 BTU/h | 30,000 BTU/h |
| Heating capacity at −13°F | 8,600 BTU/h | 16,000 BTU/h | 23,900 BTU/h |
| Outdoor model | QO1-M2Z18-NC-NA | QO1-M2Z18-NC-NA | QO1-M3Z27-NC-NA |
Source: Quilt configuration sheets Rev 4 and technical brochure Rev 15, reviewed October 12, 2026. Cooling rated at 95°F; heating rated at 47°F. Read the manufacturer specifications (PDF).
Rated output is different from maximum output. These figures compare equipment combinations; they do not size your home or promise the same result in every room.
Missouri winter planning
Capacity at a temperature is only half the question.
The other half is how much heat the home loses at that temperature.
Quilt lists cold-weather capacity at 5°F and −13°F. We compare the applicable system output with the building’s calculated load and discuss the coldest design conditions for your project.
Do not assume every home can remove its existing heating equipment. Supplemental heat, the rooms served, electrical capacity and the homeowner’s resilience needs belong in the design discussion.
Indoor units sharing an outdoor unit have heating/cooling mode constraints. Separate room setpoints do not mean unrestricted simultaneous heating and cooling.
Before we recommend equipment
What the assessment needs to settle.
- Room-by-room heat loss and gain, insulation, glass and sun exposure.
- Indoor placement, airflow and access for care.
- Outdoor placement, sound and required clearances.
- Electrical supply and the work needed for the selected equipment.
- Refrigerant lines, elevation and condensate drainage.
- Existing equipment, future expansion and the limits of each matched combination.
We verify current manufacturer documents before using a match for equipment selection or incentive eligibility. A published seasonal efficiency figure is not proof of a particular rebate.
Freedom HVAC • Joplin region
Let’s talk about your rooms.
Tell us where you are, what feels uncomfortable and what you want to change. We’ll confirm service availability and help you take the next step.