8.9 sec in total
449 ms
7.9 sec
560 ms
Welcome to viessmann.it homepage info - get ready to check Viessmann best content for Italy right away, or after learning these important things about viessmann.it
Viessmann produce innovativi sistemi di riscaldamento e climatizzazione per applicazioni residenziali, industriali e commerciali
Visit viessmann.itWe analyzed Viessmann.it page load time and found that the first response time was 449 ms and then it took 8.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.
viessmann.it performance score
name
value
score
weighting
Value2.5 s
67/100
10%
Value8.7 s
1/100
25%
Value7.7 s
25/100
10%
Value1,580 ms
12/100
30%
Value0.006
100/100
15%
Value9.5 s
30/100
10%
449 ms
600 ms
201 ms
702 ms
208 ms
Our browser made a total of 50 requests to load all elements on the main page. We found that 88% of them (44 requests) were addressed to the original Viessmann.it, 4% (2 requests) were made to Stats.viessmann.com and 4% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (6.2 sec) belongs to the original domain Viessmann.it.
Page size can be reduced by 1.1 MB (24%)
4.4 MB
3.4 MB
In fact, the total size of Viessmann.it main page is 4.4 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 20% of websites need less resources to load. Images take 3.2 MB which makes up the majority of the site volume.
Potential reduce by 69.4 kB
HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 69.4 kB or 83% of the original size.
Potential reduce by 191.6 kB
Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Viessmann images are well optimized though.
Potential reduce by 441.7 kB
It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 441.7 kB or 70% of the original size.
Potential reduce by 375.0 kB
CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Viessmann.it needs all CSS files to be minified and compressed as it can save up to 375.0 kB or 74% of the original size.
Number of requests can be reduced by 7 (16%)
44
37
The browser has sent 44 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Viessmann. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for JavaScripts and as a result speed up the page load time.
viessmann.it
449 ms
www.viessmann.it
600 ms
viessmann.base.fonts.latin.min.css
201 ms
viessmann.base.app.min.css
702 ms
global-js-snippet-head.data.js
208 ms
viessmann.base.lib.modernizr.min.js
320 ms
viessmann.base.lib.min.js
702 ms
viessmann.base.app.min.js
439 ms
global-js-snippet-body.data.js
212 ms
trackingCode.js
111 ms
icon-wohngebaeude-white.png
122 ms
icon-gewerbe-white.png
123 ms
icon-industrie-white.png
104 ms
icon-kommunen-white.png
105 ms
icon-login.png
122 ms
654x359_XL_1-2Image_PoPupCheck.png
848 ms
viessmann-logo.png
3217 ms
Viessmann-Wohngebaeude-01.jpg
3911 ms
Mittelkessel-XL.jpg
4261 ms
Viessmann-Industrie.jpg
4180 ms
1920x600_XL_StageImage_Teleriscaldamento.jpg
6222 ms
Login-Marktpartnerportal.jpg
3337 ms
box1-blog-viessmann.png
3825 ms
312x350%20TileImage1Col_Convegno.jpg
3553 ms
garanzia_plus_viessmann_312x350%20TileImage1Col.jpg
3669 ms
Vitotrol-Plus-App.jpg
3883 ms
erp-labeling.jpg
3928 ms
Welche_Heizung.jpg
3995 ms
check_energetico_viessmann_312x350%20TileImage1Col.jpg
4115 ms
partner_efficienza_viessmann_312x350%20TileImage1Col.jpg
4137 ms
312x350TileImage1Col_Detrazioni.jpg
4214 ms
Service_Offensive_312x350_f.jpg
4321 ms
312x350%20TileImage1Col_AppVIE.jpg
4342 ms
Bedienungsanleitungen.jpg
4394 ms
referenzen.jpg
4324 ms
messen.jpg
4469 ms
catalogo_viessmann_312x350%20TileImage1Col.jpg
4526 ms
viessmann_logo_footer.png
4432 ms
wtid.js
427 ms
analytics.js
20 ms
UniversLTW01-55.woff
4464 ms
UniversLTW01-45.woff
4529 ms
UniversLTW01-57.woff
4457 ms
collect
24 ms
collect
63 ms
facebooktile.facebookTileContent.htx
4912 ms
twittertile.twitterTileContent.htx
4827 ms
icon-kachel-facebook-xl.png
4080 ms
icon-kachel-twitter-xl.png
4074 ms
dcs.gif
117 ms
viessmann.it accessibility score
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Internationalization and localization
These are opportunities to improve the interpretation of your content by users in different locales.
Impact
Issue
<html> element does not have a [lang] attribute
Names and labels
These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.
Impact
Issue
Image elements do not have [alt] attributes
Links do not have a discernible name
Best practices
These items highlight common accessibility best practices.
Impact
Issue
[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.
viessmann.it best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Page has valid source maps
viessmann.it SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Image elements do not have [alt] attributes
Mobile Friendly
Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).
Impact
Issue
Document uses legible font sizes
IT
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Viessmann.it can be misinterpreted by Google and other search engines. Our service has detected that Italian is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Viessmann.it main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.
viessmann.it
Open Graph description is not detected on the main page of Viessmann. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: