Washington · 639 cities and towns

Heat Load Calculation in Washington for $100.

Heat load calculation for houses in Washington: design heat loss and heat gain to Manual J, the basis for sizing furnaces and heat pumps correctly. $100 per house, J, S and D 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.

Climate zones in Washington

Washington spans 3 climate zones.

Design conditions change across the state, so the same house plan can need different equipment in different cities. Places by IECC climate zone (county assignment):

  • Zone 4C · 414 places
  • Zone 5B · 176 places
  • Zone 6B · 49 places
Pricing

J, S & D for $100 in Washington. 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 Washington, 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.

Largest cities

Heat Load Calculation in the biggest cities of Washington.

All cities and towns

Every place in Washington.

Built for the trade

For builders and HVAC contractors in Washington.

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

FAQ

Heat Load Calculation in Washington, answered.

Heat load or heat loss?

Heat loss is the winter side: how much heat the house loses at the heating design temperature. Heat gain is the summer side. A Manual J report gives both, room by room.

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.

What do I need to send?

Floor plans, elevations or orientation, the window and door schedule, insulation levels, duct location and the equipment you plan to install.

Sunny suburban street with new homes

Your next permit, sized right.

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

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