Builder & GC Services
New Construction HVAC for Builders and General Contractors Load Calcs to Final Inspection, On Your Schedule
Reliance Air Services handles the full new construction HVAC scope for custom homes, production builds, multifamily and light commercial projects, from Manual J load calculations and permits through rough-in, trim-out and final inspection.
- ✅ License #CAC1819474
- 🏆 BBB Accredited
- 🔧 ACCA Member
- ★★★★★ 4.9 · 500+ Reviews
- 🏠 Family-Owned · Sarasota Based
- ⚡ Manatee Chamber Member
Why Bring Us In Early
New Construction HVAC Starts at Plan Review, Not Framing
The cheapest time to get a home's mechanical system right is before the first stud goes up. When we see drawings during design development, we can size equipment from real loads, flag chases and soffits that need room for duct trunks, and confirm the air handler location works for service access and condensate routing.
Late involvement usually means compromises: ducts squeezed into whatever cavity is left, returns that are too small, or equipment picked from a rule of thumb. Those shortcuts show up later as noisy registers, hot bonus rooms and humidity complaints from new homeowners, which tend to land on the builder's phone.
We work as your licensed mechanical sub under Florida license CAC1819474, and our goal is simple: a system that passes inspection the first time and keeps buyers comfortable long after closing. If you are budgeting a single custom home rather than a whole community, our residential HVAC installation team can also walk owners through equipment choices.
Sizing
Manual J Load Calculation: The Foundation of Every Build
A Manual J load calculation is the ACCA method for working out how much heat a specific house gains and loses, room by room. It accounts for wall and attic insulation, window area and orientation, ceiling heights, infiltration and the local design temperatures. From there, Manual S guides equipment selection and Manual D sizes the duct system so each room gets the airflow it needs.
In a Gulf Coast climate, oversizing is the more common mistake. A unit that is too big cools the air quickly, shuts off before it pulls moisture out, and leaves the house feeling clammy. Tight new envelopes with good windows often need less tonnage than people expect, which is why we size from the plans rather than square footage. Florida's energy code also expects equipment to be sized to the calculated load, so the paperwork supports your permit package.
For a deeper look at the engineering side, read our article on load calculations for Florida new builds.
How a Build Runs
Our New Home AC Installation Timeline
Every project is sequenced around your superintendent's schedule. Here is how a typical residential build moves from drawings to certificate of occupancy.
Plan review and load calculations
We review architectural drawings, run Manual J, S and D, and return an equipment schedule and duct layout so you can lock pricing and lead times early.
Permits and scheduling
We pull the mechanical permit ourselves, confirm material availability, and agree on rough-in dates with your super so nothing waits on us at framing.
Rough-in
Our crew sets duct trunks and branches, refrigerant line sets, condensate drains, equipment platforms and thermostat wiring, then calls for the rough mechanical inspection.
Trim-out and startup
After drywall and paint, we set the condenser and air handler, install registers, grilles and thermostats, charge the system and verify airflow and temperature split.
Final inspection and handoff
We close out the permit, work the punch list, register equipment with the manufacturer and leave the homeowner with a short orientation on filters and controls.
Project Types
HVAC for Builders in Florida, Sized to the Job
The process scales from a single infill home to a phased multifamily project. What changes is coordination, not quality.
Custom homes
Zoning, multiple air handlers, whole-home dehumidification and fresh-air ventilation for larger floor plans with high ceilings and lots of glass.
Production communities
Repeatable layouts and equipment packages for each plan, with crews ready to roll through lots as framing releases them.
Multifamily and townhomes
Individual systems per unit, stacked chases and phased schedules that work around occupied buildings when needed.
Light commercial build-outs
Offices, medical suites and retail spaces with ventilation and humidity needs beyond comfort cooling.
Commercial HVAC →Additions and ADUs
Ductless systems for garage apartments, additions and spaces the main ductwork cannot reach.
Ductless options →Air quality upgrades
UV lights, media filtration and dedicated dehumidifiers specified at rough-in instead of retrofitted later.
Indoor air quality →Coordination
Built to Work Inside Your Project Workflow
Reliance Air Services is listed on the Procore network, so general contractors who manage jobs there can bring us into RFIs, submittals and close-out documents without another login to chase. If your team runs on a different platform, we will work inside it.
You get one point of contact who knows the job, not a dispatch queue. We communicate directly with your superintendent about rough-in dates, inspection results and any conflicts with plumbing or electrical, and we keep our scope tidy so the next trade is not cleaning up after us.
Duct design gets the same attention. We route and seal trunks and branches to minimize leakage and pressure drop, which matters more in an attic that reaches extreme temperatures in summer. Learn more about our duct sealing and design work.
Scope of Work
What Our New Construction Package Covers
- Manual J, S and D calculations from your plans
- Equipment schedule and duct layout drawings
- Mechanical permit application and inspections
- Duct design, fabrication and sealing
- Refrigerant line sets and condensate drains
- Thermostat and control wiring
- Equipment set, charge and commissioning
- Ventilation and dehumidification where specified
- Punch list and final permit close-out
- Manufacturer warranty registration
- 10-Year Comfort Guarantee on our workmanship
- Homeowner orientation at turnover
Common Questions
New Construction HVAC for Builders and General Contractors — FAQs
When should a builder bring an HVAC contractor into a new construction project?
Ideally during design development, before construction documents are final. That gives us time to run load calculations while the plan can still change, reserve space for duct chases and the air handler, and lock equipment before lead times stretch. Production builders can bring us in as late as permit submission, but earlier involvement usually saves money and avoids field changes.
Do you pull the mechanical permits for new construction HVAC?
Yes. We prepare and submit the mechanical permit, schedule the rough and final inspections, and handle close-out. You receive the permit records at the end of the job. Builders working anywhere in Sarasota, Manatee, Pinellas or Hillsborough counties can hand us the full permitting scope so the superintendent has one less thing to track.
How does the 10-Year Comfort Guarantee protect a builder?
Every new system we install is backed by our 10-Year Comfort Guarantee. If the system breaks down because of our workmanship within the first decade, we fix it at no labor cost. Equipment parts are covered separately by the manufacturer's warranty, which we register at installation. Homeowners call us directly, so HVAC callbacks do not land on your desk after closing.
Can you handle multifamily or light commercial new construction?
Yes. Along with single-family homes we work on townhomes, apartment and condo projects, and light commercial spaces such as offices, medical suites and retail build-outs. Multi-unit projects get phased scheduling and a single contact who coordinates with your project manager. Tell us the unit count and timeline and we will discuss crew planning with you.
Do you install high-efficiency or heat pump systems in new homes?
Yes. Many new Florida homes use heat pumps because they cool efficiently and handle the region's mild winters without a furnace. We help you balance first cost against efficiency targets and buyer expectations. Our SEER2 rating guide explains how efficiency ratings work if your buyers ask about them.
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