Straight answers before you send.

A room by room heating and cooling load calculation following the ACCA method, with whole-house totals, modeled in Wrightsoft. You get a permit-ready PDF and 1 revision, delivered in 2 to 3 business days. Starting at $185 up to 2,000 sq ft, plus $0.06 per sq ft above that.

Manual J loads, Manual S equipment selection and Manual D duct design, delivered together in one permit-ready PDF with 1 revision, in 3 to 5 business days. Starting at $395 up to 2,000 sq ft, plus $0.08 per sq ft above that.

Manual S checks equipment against your Manual J loads at real operating conditions. If you already chose a unit, we check that one; if not, we tell you what size fits. Delivered in 2 to 3 business days, starting at $210.

No. Both depend on the loads from a Manual J, so we always do the Manual J as part of the package.

Yes. Manual N covers commercial loads for retail, office and light industrial spaces. It starts at $450 and is priced from your plans.

A list of every fitting, elbow and length of duct the design calls for, built by our AG3 Estimating Platform from the finished Wrightsoft model. It's for HVAC contractors, added to the HVAC Design Package at $95 per engineering hour, and included for partners. Send your supplier price list and we can price it against what you pay.

Usually within one business day after we get your plans.

• Manual J and Manual J & S: 2 to 3 business days
• HVAC Design Package (J, D & S): 3 to 5 business days

Business days count from the day we have complete plans and you've accepted the estimate. Your delivery date is also in the estimate.

Yes. Rush delivery in 24 to 48 hours adds 30% to the project price, counted the same way: from complete plans and an accepted estimate.

Once we have complete plans and the information we asked for, and you've accepted the estimate.

• Property address and floor plans
• Window and insulation specs
• Equipment info, if it's already chosen
• Preferred duct layout, if any

Send what you have. We'll ask for anything missing before we start.

PDF floor plans with dimensions work best. The form also takes JPG, PNG and ZIP, up to 10 files and 200 MB in total. For a bigger set, paste a Drive, Dropbox or WeTransfer link, or email office@ag3services.com.

Yes. Tell us what you know and we'll agree on the values to use with you before we model, so nothing is a surprise in the report.

We send the invoice when we deliver the design, due in 15 days. You can pay by Zelle, bank transfer or check payable to AG3 Home & Commercial Services LLC.

No. You pay when the design is delivered.

Final design files are released once the invoice is paid in full.

15 days from the estimate date. After that, the price may change.

1 revision per deliverable, as long as the plans haven't changed. More revisions or design changes are billed at $95 per engineering hour.

We quote the change before doing the extra work, so you decide first.

It's the HVAC design document that homes in the ENERGY STAR Single Family New Homes program need. We build it from the same Manual J, S and D models used for your design.

It's a $125 add-on to the HVAC Design Package (J, D & S).

No. The report needs the full design, so it's only offered with the HVAC Design Package.

The area is charged once for the whole house, and each additional system adds $150.

A 5,000 sq ft house with two systems on the HVAC Design Package starts at $785: $395 + $240 for the 3,000 sq ft over 2,000 + $150 for the second system. Your exact price is in the estimate.

Yes. We're based in Dallas-Fort Worth and do the design work online, so we take projects across the US.

Yes. We work in English or Spanish.

No. AG3 does HVAC design only. Installation stays with your HVAC contractor.

Our calculations are ACCA aligned (Manual J, S, D and N), modeled in Wrightsoft, and checked against ANSI and ASHRAE methods.