For example, if you have a consistent wall cavity insulation, you only have to enter it once. What makes HVAC-Calc stand out is that many common variables get carried over from entry to entry. Data entry is tedious but unavoidable in all programs of this genre. Rooms are assigned to various zones within a "tree". HVAC-Calc runs quickly on Windows-based machines and is well-organized. For example, you may discover that a proposed addition to your home may not require any additional heating/cooling infrastructure since the previously installed HVAC systems were too large to start with (a common problem, apparently). In other words, even if you don't personally want to complete a Manual-J heat gain/loss calculation yourself, insist on using a contractor that does. There are many problems associated with oversized systems such as short cycling (affects appliance life), excessive humidity in the summertime (because the AC can't stay on long enough to remove latent heat), etc. Having a Manual-J compliant calculation is the best way to ensure that your AC and/or heating systems are sized properly and work at peak efficiency.
#LOOPCAD STAIRWELL LICENSE#
Homeowners who want to buy an non-time-limited license will have to put down about $200, while pros will enjoy the program at nearly $400.
![loopcad stairwell loopcad stairwell](https://i.ytimg.com//vi/eBFJQKPTbyI/sddefault.jpg)
It's probably the best heat gain/heat loss program a homeowner can buy, as a two-month license is only $50. Several months ago, I bought a license for HVAC-Calc to help guide me in a current house renovation.
![loopcad stairwell loopcad stairwell](https://i.ytimg.com/vi/CVXGMuB8wlU/hqdefault.jpg)
Why perform a heat-gain or heat-loss calculation at all? Homeowner Review of HVAC-Calc Originally written March 30, 2004, updated April 18 and June 28, 2004