REM/Design logo.

User-friendly, yet highly sophisticated, residential energy analysis and code compliance software which eliminates the uncertainty and guesswork from energy design and code compliance decisions. Developed specifically with the needs of homebuilders, remodelers, energy consultants and designers in mind, REM/Design calculates heating, cooling, hot water, lights and appliance loads, consumption and costs for single and multi-family designs in over 250 North American cities. This Windows-based software automatically analyzes the energy and economic performance of numerous energy design features including envelope insulation, air leakage control, duct leakage control, active and passive solar systems, heating and cooling equipment, mechanical ventilation and more. In addition to calculating energy performance, REM/Design sizes heating and cooling equipment, and automatically determines compliance with the CABO Model Energy Code (1992, 1993, 1995) the International Energy Conservation Code (1998, 2000), ASHRAE 90.2, and the EPA's Energy Star Home program. Screen Shots


energy simulation, residential buildings, code compliance, design, weatherization, equipment sizing, EPA Energy Star Home analysis



Expertise Required

Medium level of computer literacy required.


Used by energy consultants, homebuilders, designers, utilities, weatherization professionals and researchers throughout the U.S. and Canada.


Energy consultants, homebuilders, designers, and utility and weatherization professionals.


Two levels of input: simplified and detailed. Simplified inputs use general building design characteristics (e.g., house type) and built-in algorithms to determine building shell areas and other characteristics. Detailed inputs provide the user greater control over calculational values. Inputs include, opaque wall construction details, window conduction and solar gain values, HVAC efficiencies, duct system characteristics, passive and active solar design features, infiltration rates (measured or estimated).


22 preformatted reports, available for viewing on screen or printing. Reports include energy use, energy cost, normalized energy use, design loads, code compliance, and economic analysis of energy upgrades.

Computer Platform

PC-compatible, Windows 95/98/NT/2000/ME, 8 MB disk space

Programming Language



Considered one of the easiest residential energy analysis tools to use. One of the only tools that allows side-by-side comparison of two homes, making analysis of energy upgrades easy. Automatic improvement analysis makes automated design optimization possible. Multi-purpose tool brings together in a single package the capability to perform design optimization, improvement analysis, compliance analysis and equipment sizing. Explicit modeling of duct conduction and leakage.


Single zone model. Seasonal methodology cannot predict hourly values. Unsophisticated HVAC equipment modeling.



Architectural Energy Corporation


2540 Frontier Avenue, Suite 201
Boulder, Colorado 80301
United States


(303) 444-4149


(303) 444-4304




$297.00, includes 247 North American climate sites and Users Guide. Architectural Energy Corporation offers a 30 day money-back guarantee on the purchase of REM/Design. To order REM/Design or to receive a free demonstration disk please contact Dave Roberts at the above address, or you may download a demo from the web site.