Heat-Load USA

ACCA Manual J load calculation - Manual S - Manual J HVAC - Manual J Calculation Service - Heat Load Calculation - Residential Load Calculation - Manual J Services - What is a Manual J - manual j hvac residential load calculation

- load calculation - Manual N - Commercial load calculation = HVAC ENGINEERS - HVAC CONSULTANTS

- ACCA Manual N Commercial load calculation - Manual D - Manual D calculation - Manual J & D Calculations

Manual N

Commercial Heat Load Services

Professionally Prepared For You

Manual N is the heat load calculations for a non-residential or commercial buildings.

Call us today: 973-544-6800 

or email us: Info@HeatLoadUSA.com


When a load calculation is done for a residential property it is known as a Manual J.  When it is done for a commercial property - like a church or office, it is known as a Manual N. 

The same principles are used for residential or commercial. The laws of physics do not change by property type or by political boundary.  It's just that for a commercial property we need a lot more information. 

Information like how many occupants by hour and by day? How many machines will be operational? At what time? How many times per hour will the front door open and close? Often the owner many not know, and we then have to take an educated guess. But the more accurate information you can provide us, the more accurate your load calculation will be.   

We provide Manual N services for clients all over the US. Most of our customers are architects, engineers, contractors and business owners.  

We can prepare Manual N reports for the following types of buildings:

  • Churches
  • Restaurants, cafeterias, diners and fast-food chain stores
  • Banquet Halls
  • Schools from Kinder garden to high school 
  • Retailers: small ma-pa shops, supermarkets to big-box retailers
  • Office buildings
  • Banks
  • Gyms 
  • Government buildings like city-hall buildings

Other non-residential buildings.  The physics of heat loss remain the same as in residential but the use varies significantly.  These activities and occupancy can significantly shift the cooling loads up and heating loads down.

Our reports are guaranteed to be: 

  • Accepted by your building department or your money back                              (certain restrictions apply)

  • Accurate and applicable to the building needs.  Heat Load USA  can do your commercial heat load calculations for you. Our reports utilize the Manual N or ASHRAE RTS method. 

  • Reports take 4 business days & are sent to you via email in PDF format.

What We Need In Order To Prepare Your Manual N

  1. Floor Plan

  2. Estimate business occupancy by hour (how many people in the business by hour)

  3. Electrical lighting load (display lighting etc)

  4. Electrical equipment (computers, machines, motors, refrigerators, freezers etc)

  5. Coverage area and location of each HVAC system

  6. Insulation levels of building


Call Us:  973-544-6800

Email us:  info@HeatLoadUSA.com