Commercial HVAC Load & Energy Code Calculation

Florida Building Code 8th Ed. (2023) Chapter C4 · ACCA Manual N / ASHRAE block load · ASHRAE 62.1 ventilation · offices, medical, retail, restaurants, warehouses, tenant build-outs

Enter the building envelope and one row per zone / space type. People, lighting and plug loads default from the space type and can be overridden. Blank fields are defaulted and listed in the report. Duct layout is not included. Projects with systems over 15 tons or requiring sealed mechanical plans are finalized by a Florida-licensed engineer as a follow-up.

1. Project

Title block / cover sheet.

Project name *

Street address *

City *

ZIP

County *

Design location (weather)

Owner / tenant

Contractor / architect

Permit office

Permit #

Occupancy (IBC)

Project type

2. Building geometry

Gross conditioned floor area, ft² *

Stories (conditioned)

Floor-to-floor / wall height, ft

Slab perimeter (exterior), ft

Roof area, ft² (blank = footprint)

Indoor cooling / heating setpoint °F

Exterior walls by orientation (gross length × height)

Orientation	Construction	Length ft	Height ft

3. Envelope

Default wall construction

Roof assembly

Roof surface

Floor

Skylight area, ft²

Skylight U / SHGC

Infiltration, cfm per ft² of wall

Vertical fenestration (storefront, windows, curtain wall)

Orient.	Qty	Width ft	Height ft	Glazing	U	SHGC	Overhang ft	Sep. ft

Exterior doors

Orient.	Qty	Type	Width ft	Height ft

4. Zones / spaces

One row per zone or space type. Leave people / LPD / plug blank to use the space-type defaults (ASHRAE 62.1, FBC C405.3.2).

Zone name	Space type	Area ft²	People (opt.)	Lighting W/ft² (opt.)	Plug W/ft² (opt.)

Process / hood load, Btuh sensible (opt.)

Process latent, Btuh

Process description

5. Mechanical

System type

Number of units

Make / model(s)

Total cooling capacity, Btuh (all units)

SEER2 (≤65 kBtuh) / EER2

IEER

Heating type

Heating capacity, Btuh

HSPF2 / COP / AFUE

Duct location

Outdoor air cfm (blank = ASHRAE 62.1)

Energy recovery (ERV) on outdoor air

Economizer

Demand-control ventilation

6. Lighting & service water

Exterior lighting

Lighting controls

Water heater

UEF / thermal efficiency

7. Contact & delivery

Your name *

E-mail *

Phone

E-mail me a copy of the PDF

Notes for the engineer (sheet references, special conditions, hours of operation)