Although the primary objective of Phase 1 of the AkWarm Modernization Project was to replicate the functionality of the original AkWarm software program (version 1.03d) using modern software development tools, some new features are available in the AkWarm 2 release. A listing of most of those features is below.
Unlike the AkWarm 1.03d, AkWarm 2 runs on the Microsoft Vista operating system, as well as running on Windows XP Service Pack 2 (SP2) or later.
From the opening screen in AkWarm 2 where you can start a new Rating or open an existing one, you also have the option to pick which Energy Library you want to use when calculating Ratings. This feature is available as the "Switch Library ..." option on the File menu. If you don't utilize this option, the most recent Energy Library will be used for calculations. However, see the next paragraph for a situation where using an older Energy Library is useful.
The new 3/13/2009 Energy Library for AkWarm 2 (and the 2/12/2009 Library for AkWarm 1.03d) has a more accurate efficiency rating for a Conventional Natural Gas Boiler. For a rating done with a prior version of the Library involving this type of heating system, the Rating Points will be different if calculated with AkWarm 2. To be fair, you can use the older library efficiency values to do a Post rating on such a home. The "Switch Library" feature makes it easy to utilize an older Energy Library in a rating.
File names are no longer limited to only 8 characters. Up to 255 characters can be used for the directory path plus file name.
More than one home can be open simultaneously in the AkWarm program. This facilitates comparisons between different homes.
The Retrofit Reporter software, which allows creation of a detailed and nicely formatted Improvement Options report in Microsoft Word format, is now built into the main AkWarm software instead of being a separate add-on program.
As one of the standard improvement options, you can analyze the addtion of a ventilation system without heat recovery or a heat recovery ventilator.
The Shell Component Area and Home Volume input boxes have a number of new useful features. First, you are not limited to two lines of entry; expressions can be entered on many separate lines for clarity. Second, labels ending in a colon can appear at the beginning of each line to help you remember what part of the component or home the expression refers to. Finally, feet and inches can be used in the expressions using the standard ' and " notations. An example of a valid Volume entry is:
First Floor: 40 * 30 * 8 Second Floor: 30 * 30 * 8'6" Third Floor: 20'4" * 24'6" * 8'3"
The Garage Wizard now creates all of its components at the Living Space temperature, in compliance with Rating policy. Relative to AkWarm 1, this reduces workload and diminishes the chance for error.
Instead of Air-change-per-hour being the primary blower door test input, CFM at 50 Pascals is used. Changes in the volume input will not cause the CFM @ 50 Pa input to change.
All editing of Shell components now occurs on the main screen, without the need for pop-up editing dialogs. Components are now organized by type; for example, all Wall components appear together in the list of shell components. Also, the list of shell components contains calculated R-values and areas, performing the function of the "Summmarize" button in the old AkWarm.
The list of space heating and domestic hot water heating systems are now organized into categories (e.g. forced air, hydronic, direct) to facilitate finding the correct system. Also, a preview of the assumed AFUE or Energy Factor for each system is shown.
The description of the Location of an improvement can now be edited by the user. Also, Notes, Location, and Boilerplate to include can be edited from both the input screens and from the list of improvements on the output screen.
Plus levels are now shown on the Rating Number Line graphic shown on the output screen and on the Rating Certificate, making it easier to see how close a home is to the next higher Rating level.
Any printer can be selected prior to printing AkWarm reports. The Energy Cost and Features report now fits on one page in most situations. The Energy Flows report is now nicely formatted with clear column alignment. Reports are more ink-efficient through use of cross-hatching instead of solid fills for bar graphs.
A log-in screen does not appear at start up. Instead, log-in is only required when you attempt to save a rating as an Official Rating, which is accomplished through a button on the Rating output screen. Also, there is no need to manually enter an Official Rating Point total.
If an unexpected error occurs in the application, the user is given a chance to enter a comment and send the problem file to the developers. Also, the user can return to the program and save their work.
Also, rating inputs are checked real-time for validity; improper inputs are marked with red exclamation points if they need attention.
Energy library files are now only about 100 KB in size, instead of nearly 1 MB, facilitating faster download and e-mail of the files.