Delray Beach · Manual J & D Design
Manual J Load Calculation & Manual D Duct Design in Delray Beach, FL
In-house Manual J load calculations and Manual D duct designs, so your system is right-sized and every room gets the air it needs. Serving Delray Beach, FL. 4.8★ on Google with 229+ reviews.
18+
Years in business
4.8★
229+ Google reviews
Licensed
FL #CAC1820211
A+
BBB Accredited
24 / 7
Emergency response
Why Swift AC
What you get with our manual j load calculation & manual d duct design.
Four things we don't compromise on, every job, every customer.
Why this matters
Built for the home you live in.
Your AC is not a piece of equipment. It is the difference between kids sleeping through hot August nights and a hallway fan war at 2 a.m.
We treat every install and repair the way we would want our own family taken care of. Properly sized systems. Honest diagnostics. Clean work that lasts. Because the people you love deserve a home that stays cool, dry, and comfortable, year after year, without you having to think about it.
Why Swift AC
The standard South Florida homeowners trust.
We earn our reputation one job at a time. Every system we install, every repair we make, every customer we serve carries our 100% satisfaction guarantee.
Offers for Delray Beach customers
Save on quality HVAC service.
Real, simple deals on the work you actually need. No mystery pricing, no bait and switch.
What customers say
4.8★ on Google with 229+ reviews.
We earn our reputation one job at a time. Here's what your neighbors are saying.
“When you are looking for a reliable, quick and honest HVAC team this is the company you want to deal with. Reach out, you will be wowed. Also, they are nice guys and will spend the time to explain your needs.”
David Ragheb
West Palm Beach
...and 226+ more on Google.
Book your manual j & d design in under 30 seconds.
A real Swift AC team member answers, every time. Same-day service across South Florida.
About Delray Beach
Manual J Load Calculation & Manual D Duct Design in Delray Beach, FL.
Delray Beach homes are hard to size with a rule of thumb. A renovated cottage near Pineapple Grove with new impact windows and a sealed attic can need much less cooling than the house it used to be, while a mid-century home in Lake Ida with an enclosed porch and an older roof may need more than its square footage suggests. Swift runs Manual J load calculations in-house for the systems and duct projects we install in Delray Beach, so the equipment matches the house in front of us. The calculation goes room by room, which is what lets a Manual D duct design send the right amount of air to each space. That is how we hold every bedroom within 3°F of the thermostat. Getting the size right also helps with humidity. An oversized system in a coastal Delray Beach home cools quickly, shuts off and leaves moisture behind, while a correctly sized one runs long enough to dry the air.
About this service
Manual J Load Calculation & Manual D Duct Design in Delray Beach
Most air conditioners in South Florida were sized with a rule of thumb, so many tons for so many square feet, or simply matched to the unit they replaced. That shortcut ignores what really drives the load in a Florida home: window area and direction, glass type, shading, insulation, ceiling heights, duct location, air leakage and the moisture the system has to remove. An oversized system cools fast, shuts off and leaves the house clammy. An undersized one runs nonstop. And without a duct design, even a perfectly sized system can't get the right amount of air to each room.
Swift Air Conditioning does this work in-house, using the ACCA standards. Manual J is the room-by-room heating and cooling load calculation. Manual S uses those loads to select equipment with the right capacity and enough moisture removal for our climate. Manual D designs the duct system, sizing each supply, trunk and return so the blower can deliver the airflow each room needs. Manual T guides the choice of registers and grilles so the air mixes well in every room.
The design target is the comfort guideline in ACCA's Manual RS: each room within 3°F of the thermostat while cooling. We build every replacement and duct project to the design, then measure airflow and temperatures after installation to confirm it performs.
Florida's energy code calls for heating and cooling equipment in new homes to be sized with Manual S from a Manual J load calculation, and the residential code points to Manual D for duct design. We bring the same discipline to replacements, additions and renovations, because it's what makes a home comfortable. Call (561) 685-8408 to schedule an in-home visit.
Ruud Pro Partner
Real Swift work in Delray Beach.
Watch what to expect when our team shows up. Honest installs, careful technicians, the same standard on every Delray Beach job.
Neighborhoods we serve
Local areas in Delray Beach.
Load calculations and duct design for Delray Beach homes in Lake Ida, Delray Shores, Tropic Isle, Pineapple Grove, the Atlantic Avenue and Swinton Avenue area, the neighborhoods east of Federal Highway, and the planned communities west of I-95 off Linton Boulevard, Military Trail and Jog Road.
Local details
Manual J Load Calculation & Manual D Duct Design details for Delray Beach.
During the Manual J visit, we measure each room in your Delray Beach home and note the details that change its load: window size and direction, glass type, shading, ceiling height, attic insulation and whether the ducts run through a hot attic. Additions get their own line in the calculation, since they often have more glass and less insulation than the original house. Manual S then narrows the equipment choices to systems that handle both the heat and the humidity load, with attention to how well the system dehumidifies at lower speeds. Manual D turns the room loads into a duct layout: trunk and branch sizes, return locations and the total pressure the blower can handle. Manual T guides which registers and grilles to use so the air mixes well instead of dumping in one corner. For townhomes and smaller cottages, the design may be compact, but it is still done room by room. We share the numbers with you and build to them.
Coverage map
Serving Delray Beach.
Same-day service across every neighborhood and ZIP code below. No travel surcharges.
Neighborhoods we serve
- Pineapple Grove
- Atlantic Avenue
- Lake Ida
- Tropic Isle
- Delray Shores
ZIP codes we cover
6 ZIP codes across Delray Beach.
Nearby cities
Manual J Load Calculation & Manual D Duct Design in nearby cities.
We service these neighboring cities with the same standard, same response time, and no travel surcharges.
Got questions?
Frequently asked questions
Square-footage rules assume every house is the same. Manual J looks at your actual Delray Beach home: window area and direction, insulation, shading, ceiling heights, duct location and occupants. Two homes of the same size can need very different equipment, and the room-by-room numbers are what make a good duct design possible.
They can. Impact windows with better glass usually cut solar heat gain and air leakage, which can lower the cooling load. If you've upgraded windows, doors, insulation or the roof on your Delray Beach home since the last system went in, a new Manual J will show whether a smaller, better-matched system makes sense.
Yes. Manual D sizes each duct for the airflow its room needs, so an addition with lots of glass gets a supply big enough to handle its load, plus a return path. Most Delray Beach additions were tied into existing ducts without a design, which is why they lag behind the rest of the house.
Manual J is the ACCA standard for calculating how much heating and cooling each room of a home needs. It accounts for walls, windows and their direction, glass type, shading, insulation, ceiling heights, duct location, air leakage and occupants, and it calculates the moisture load as well as the heat load.
Manual J calculates the loads. Manual S selects equipment that matches those loads, including enough moisture removal. Manual D designs the duct system that delivers the right airflow to each room, and Manual T guides register and grille selection. Used together, they produce a system that's sized right and delivers air evenly.
Related services
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Air Conditioning Installation
Expert AC installation with top-rated equipment and warranty-backed workmanship.
Learn moreDuct Replacement
Whole-home duct replacement designed in-house with Manual J and Manual D, then sealed, insulated and balanced. Free in-home quote.
Learn moreAirflow Diagnostic & Duct Balancing Assessment
A measured airflow diagnostic for hot and cold rooms: static pressure, room-by-room airflow, duct leakage and thermal imaging, then balancing.
Learn more
Ready when you are
Comfort done right. Let's get started.
Free estimates on installs. Honest diagnostics on repairs. Same-day service across South Florida and a real human on the other end of the line, every time.
Service area
Palm Beach · Broward · Martin · St. Lucie
Licensed FL #CAC1820211