25+ Years of Experience
Over two decades providing load calculations to contractors and homeowners across the Sumter area.
Load Calculations
Do It the Right Way the First Time — Professional Load Calculations in Sumter, SC
Most contractors order duct fittings from a wholesaler — generic sizing, lead times, and a markup baked into your invoice. We cut and seam them ourselves in our Sumter shop, sized to your actual chase, usually within 24–48 hours.
Repair cost approaching replacement? Ask about financing.
In-House Fabrication
See how we approach every project →
South Carolina Code Requires a Licensed Load Calculation
Skipping a proper load calculation is one of the most common — and most expensive — mistakes in HVAC replacement and new construction. An oversized unit short-cycles and wears out early; an undersized one never keeps up. Either way, you pay for it every month. SC code exists to prevent exactly that.
- A SC Licensed Contractor or SC Licensed Professional Engineer must perform the load calculation. Must be licensed in South Carolina.
- Manual J & S are required for all unit change-outs. Manual J, S & D are required for new homes and additions.
- Code requires ACCA Manual J, S & D or other approved calculation methodologies to be used.
Why Us
25+ Years of Getting the Sizing Right
Contractors and homeowners across Sumter trust us for load calculations that hold up to code review.
Licensed in South Carolina
Every calculation is performed by a professional contractor licensed in SC — meeting code requirements from the start.
Quick Turnaround
Easy to work with, with a fast turnaround so your permit or install timeline doesn’t stall.
Family Owned & Operated
A local, family-run business that treats every job like it’s our own home.
Ready to get your home or project sized correctly? A proper load calculation protects your comfort, your budget, and your permit.
Our Process
From Site Visit to Code-Compliant Report
Same process whether it's a single unit replacement or a full room-by-room design for new construction.
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Request Your Calculation
Tell us whether it’s a unit change-out or new construction / addition, and we’ll scope the right calculation type.
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Site Survey or Construction Drawings
For replacements, we complete a site survey to capture real construction details. For new construction, we work from your drawings and a completed survey sheet.
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Manual J, S & D Calculation
We run the ACCA Manual J (load), Manual S (equipment selection), and Manual D (duct design, when required) calculations — not shortcuts.
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Licensed Review & Report
Every calculation is completed by a SC licensed contractor, so it meets code requirements for permitting.
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Deliver Your Report
You receive a detailed, code-compliant report ready for your permit application or equipment order.
General Pricing
Straightforward Pricing for Every Job Type
Pricing may vary depending on job complexity — site surveys and construction details determine the exact scope.
Block Loads for Unit Replacement
Site survey required to properly acquire construction details.
- One Unit: $450
- Two Units (same house): $625
- Larger than 2,000 sq ft per unit: add a 10% premium
Alternate pricing is available if the site survey is completed by a licensed contractor.
Request a quote →Room-by-Room Load Calculation with Duct Design
New construction drawings provided & survey sheet completed.
- One Level Home / One System: $300
- Two Level Home / Two Systems: $550
- Two Level Home / One System with 2 Zones: $650
- Homes larger than 3,000 sq ft: add a 10% premium
- Homes larger than 4,000 sq ft: add a 20% premium
Sized Right, the First Time
Get a Load Calculation You Can Build On
Code-compliant, professionally licensed, and priced upfront — schedule your load calculation today.