Size a Mini-Split for How the Room Is Used, Not the Brochure

A South Florida ductless head should match occupancy, glass, and drain path. Size from how Miami-Dade and Broward rooms are lived in, not from a brochure that assumes an empty bedroom.

Cooling equipment related to ductless comfort planning for a South Florida room

Ignore the brochure square-footage until you know the hours

A-Max sizes a ductless head from the hours people occupy the room, not from the empty-wall photo in a product sheet. A guest suite that sits closed all week is a different load than a Kendall home office with computers and west glass. A converted garage gym is not a Florida room with sliders into the yard. Occupancy, door habits, and heat sources beat the square footage on a listing sheet.

We service ductless systems through mini-split repair. Central cooling questions still belong on A/C repair when the rest of the house is the complaint. Do not ask one head to hide a failed outdoor unit serving the main living spaces.

Write when people are in the room, whether the door stays open, and what else makes heat. Afternoon sun on Miami-Dade and Broward glass is a different note from an interior den with no windows. Those two rooms should not get the same default head.

Put the sensor where people actually sit

The indoor unit reads the air in front of it. A head blowing across a doorway into a hotter hall will chase the hall. A head over a west window will call for more cooling than the seating area needs. Furniture layout belongs in the first sketch, not after the line set is brazed.

If the family lives in the room with the door open to a lanai, say so. Open sliders dump outdoor humidity into the same air the head is trying to dry. Closed-door use is a cleaner job. Mixed use needs a honest load description, not a wish that the head will ignore the yard.

Wall controls and remotes should land where the occupant can reach them. Photos of the finished furniture plan beat a blank floor plan. Related control location issues on central systems are in where the thermostat sits in a Miami home.

Drain, electrical, and the outdoor pad are the install

Condensate has to leave. Gravity drains need slope. Pumps need power and a discharge that will not stain stucco. Finishing a Florida room and then asking where the water goes is how you get a stained wall six weeks later. Photograph the indoor location, the chase, and the outdoor pad before finish work closes.

Panel capacity, disconnect location, and line-set length belong in the same drawing. A condo closet with no spare breaker is a different project than a house with room in the panel. Permits and association rules should appear before equipment is ordered, not after the crane is scheduled.

Outdoor units need service clearance and a pad that is not the gardeners dump zone. Salt air and tight side yards in coastal Broward and Palm Beach change placement. Inland lots still need airflow around the cabinet. Coverage notes live on service area.

A new head does not automatically fix the rest of the house

Adding ductless to a closed-off wing can be the right move when that wing never had a return path. Adding a head because one bedroom is hot, while the ducts to that room are crushed, still leaves a duct job. Browse air-duct and vent repair when the central system is the real restriction.

Humidity can stay high in a tight new room if the head short-cycles. Sticky air with a normal temperature reading is a moisture conversation through dehumidifier services, not another two-degree drop on the remote.

Water under an existing head is often a drain issue, not refrigerant. See when a mini-split water leak is not refrigerant if an older head is already dripping.

What the proposal should list separately

Name indoor location, outdoor location, line-set route, condensate method, electrical work, and start-up readings. Painting, carpentry, and optional extra heads stay on their own lines until you confirm them. Multi-head systems need a note about which room matters most at which hours.

Indoor air questions that go beyond one room still belong under indoor air assessment. A cleaner in the return will not size a head. A diagnostic visit on the central system still belongs on what happens during an A-Max AC diagnostic when both systems share the property.

We have served South Florida since 2004 with 24/7 live answering. Call (305) 255-6671 or use contact us. Send room photos, glass notes, and a panel picture. We would rather hang a head for the way you live than for the wall that was empty.

After start-up

Keep head filters on a real schedule. A gym or shop office loads faster than a guest room. Ice, water at the wall, or a head that never stops are service calls. Lowering the setpoint until the coil ices is not a plan.

Maintenance timing for the rest of the house still belongs on maintenance plans and how we think about plan visits. Company background is on about. More notes sit on the blog.

A mini-split that matches the room is useful. A head hung because it was convenient, with no drain plan and no occupancy note, becomes the next humid-season callback.

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