About Energydesignsystems
EDS is the easiest, fastest, and most accurate residential heat loss and heat gain block Load Calculator on the planet.

Founded in 2001, Energy Design Systems (EDS), an industry leader in providing and implementing HVAC engineering and sales systems; and ground-breaking marketing programs for over 20 years. EDS serves manufacturers, distributors, and contractors associated with the HVAC industry in North America. EDS allows service contractors to operate their business from anywhere. With the help of Load Calculator and Home Auditor, the company has revolutionized the way of carrying out HACK system calculations.
The fastest load calculator available. Heating systems sized in accordance with ACCA Manual J 8th edition Heat Loss Load Calculation formulas. This intuitive sales tool can be mastered in minutes and help differentiate you from your competition when utilized appropriately as part of an integrated Buyer Guidance (Sales) Process. This is a critical step in the Buyer Guidance Process that over 80% of all salespeople fail to do. This simple step will help you legally and ethically discredit contractors that size systems based on existing equipment, square footage or unreliable and inaccurate rules of thumb. The process can be performed remotely to estimate the load and then trued-up once in the home.
Show your customer exactly how and where they can save money by using your services. EDS Auditor is the quickest, most contractor and consumer friendly, supremely accurate heat loss/heat gain load calculation and home performance modeling software on the planet! All the calculations are based on industry standards from ACCA, AHRI, and the DOE. It is one of the only software programs that allows a user to calibrate and true up energy calculations to the customer’s actual utility bills.
Know more https://www.eds.tech
Featured articles and news
Classroom electrician courses a 'waste of money'
Say experts from the Electrical Contractors’ Association.
Wellbeing in Buildings TG 10/2025
BSRIA topic guide updates.
With brief background and WELL v2™.
From studies, to books to a new project, with founder Emma Walshaw.
Types of drawings for building design
Still one of the most popular articles the A-Z of drawings.
Who, or What Does the Building Safety Act Apply To?
From compliance to competence in brief.
The remarkable story of a Highland architect.
Commissioning Responsibilities Framework BG 88/2025
BSRIA guidance on establishing clear roles and responsibilities for commissioning tasks.
An architectural movement to love or hate.
Don’t take British stone for granted
It won’t survive on supplying the heritage sector alone.
The Constructing Excellence Value Toolkit
Driving value-based decision making in construction.
Meet CIOB event in Northern Ireland
Inspiring the next generation of construction talent.
Reasons for using MVHR systems
6 reasons for a whole-house approach to ventilation.
Supplementary Planning Documents, a reminder
As used by the City of London to introduce a Retrofit first policy.
The what, how, why and when of deposit return schemes
Circular economy steps for plastic bottles and cans in England and Northern Ireland draws.
Reporting on Payment Practices and Performance Regs
Approved amendment coming into effect 1 March 2025.