Forsyth County · Climate zone 4A

Manual D Duct Design in Winston-Salem, NC for $100.

Manual D duct design for Winston-Salem, NC: supply and return sizes per room, airflow, friction rate and total effective length, ready for the permit and the install crew. $100 with Manual J and S included.

  • J + S + D for $100
  • Permit-ready PDF
  • 2–3 business days
  • No subscription
New two-story home nearly finished on a construction site
Manual J + S + D · $100 per house

Free quote confirmation, no account needed. You pay per house, no subscription.

Winston-Salem at a glance

Load calculations for Winston-Salem.

4A

Winston-Salem is in IECC climate zone 4A (mixed, moist).

Heating and cooling are both significant. The heat pump balance point and backup heat need attention. Humid air: dehumidification and latent capacity must be checked in Manual S.

Climate zone by county (Forsyth County) per the DOE / IECC county assignment. Your jurisdiction’s adopted code edition decides; we use the local design temperatures for the project address.

Population
255,769
County
Forsyth County
IECC climate zone
4A
Area
133.7 sq mi

Winston-Salem issues permits for new homes, additions and HVAC replacements every week. Plan reviewers in larger cities often check Manual J inputs closely, so the report has to match the drawings.

Population: US Census Bureau estimates. Winston-Salem is a major city in Forsyth County, North Carolina.

Pricing

J, S & D for $100 in Winston-Salem. All three.

One price for every builder and every contractor, from the first house. No subscription, no software license, no minimum order.

Full permit set

Manual J + S + D

$100 / house

All three reports for one house, matched to each other, in one PDF package.

Order for $100
Load calculation

Manual J

✓ included

Room-by-room heating and cooling loads (sensible and latent) to ACCA Manual J 8th Edition.

Equipment selection

Manual S

✓ included

Checks the furnace, heat pump or AC you plan against the Manual J loads and manufacturer data.

Duct design

Manual D

✓ included

Duct sizing per room: airflow (CFM), supply and return sizes, friction rate and static pressure.

$100 per dwelling unit for all three reports, also if you need only one of them. Confirmed before we start. Unusual projects (very large custom homes, more than two systems) are quoted first.

What you get

A report your plan reviewer recognizes.

Every report is built from your actual plans and the design conditions for Winston-Salem, and delivered as one PDF you can upload with the permit application.

Room by roomHeating, sensible and latent cooling load and airflow for every room.
Code referencesPrepared to ACCA Manual J 8th Edition, Manual S and Manual D.
Matched equipmentManual S check against manufacturer data for the unit you plan.
Duct sizesManual D supply and return sizes, friction rate and static pressure.

Example screen with sample numbers (heating / cooling Btu/h per room). Your report uses your plans.

Why Manual J

Square feet per ton is not a calculation.

Two houses with the same floor area can need very different equipment. Windows, orientation, insulation, air leakage, duct location and climate change the load. Codes require ACCA Manual J and Manual S because rules of thumb usually oversize.

Order a Manual J for $100

Oversized equipment short-cyclesMore wear, more noise, worse humidity control and a higher price for the unit.
Undersized equipment falls behindRooms cannot hold temperature on the hottest and coldest days, and callbacks follow.
Plan review wants the reportIRC M1401.3 and IECC R403.7 require Manual S sizing based on Manual J loads.
Built for the trade

For builders and HVAC contractors in Winston-Salem.

We work as your back office for load calculations: you build and install, we deliver the numbers and the paperwork.

Row of new homes in a growing subdivision

Home builders & developers

  • Manual J, S and D with every permit set
  • Same $100 price for one house or a whole subdivision
  • Repeat plans: we keep your models on file
  • One contact for all your projects
New two-story home nearly finished on a construction site

HVAC contractors

  • Size equipment right and win the bid on facts
  • Load calc for replacement permits and rebates
  • Manual D before the duct crew starts
  • No software license, pay only when you have a job

Partner program

How it works

Manual J in Winston-Salem in three steps.

  1. Send your plansAnswer four questions, then email or upload floor plans, elevations, window schedule and insulation specs.
  2. We calculateManual J loads, Manual S equipment check and Manual D duct design, matched to each other.
  3. Permit-ready PDFDelivered in 2–3 business days. If plan review asks for changes to our report, we revise it free.
Builder and contractor reviewing construction plans
Your plansPDF, CAD or photos of the plan set are fine.
Floor plan with a pen and ruler
Room by roomEvery room, window and wall entered from the plans.
Roof trusses of a new house against a blue sky
Ready before rough-inEquipment and ducts sized before the crews start.
What we need

Send the plan set. We do the rest.

  • Floor plans of every level with dimensions
  • Elevations or the direction the front door faces
  • Window and door schedule (sizes, U-factor, SHGC)
  • Insulation levels: walls, ceiling/attic, floor, slab or basement
  • Ceiling heights and any vaulted areas
  • Duct location (attic, crawlspace, conditioned space)
  • Planned equipment type: heat pump, AC + furnace, mini-split
  • Air leakage target if known (ACH50)

Missing something? We tell you before we start and use code minimums only if you confirm.

Floor plan with a pen and ruler
FAQ

Manual D Duct Design in Winston-Salem, answered.

What does a Manual D report include?

Design airflow for every room, supply and return duct sizes, the available static pressure and friction rate, and the longest run (total effective length). It is based on the blower data of the equipment you select.

Do you need to visit the site in Winston-Salem?

No. We work from your plans and specifications, so a project in Winston-Salem is handled remotely like any other. If a detail is missing, we ask before we start.

What climate zone is Winston-Salem in?

Winston-Salem is in Forsyth County, which is assigned to IECC climate zone 4A. Your local building department’s adopted code edition is what counts, and we use the design temperatures for the project location.

How much does a Manual J cost?

$100 per house for Manual J, Manual S and Manual D together. No subscription and no minimum order.

How fast do I get the report?

Usually 2–3 business days after we receive complete plans and specs.

Will the building department accept it?

Reports follow ACCA Manual J 8th Edition, Manual S and Manual D and use the plans you send. Acceptance is up to your building department; if plan review asks for corrections to our report, we revise it at no charge.

Do you work with builders and contractors on many houses?

Yes. Builders and HVAC contractors are our main customers. The price stays $100 per house for J, S and D, and repeat plans are kept on file.

Sunny suburban street with new homes

Your next permit, sized right.

Manual J, S and D together for $100 in Winston-Salem. Send the plans today.

Order now
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