4.4 sec in total
308 ms
3.7 sec
435 ms
Welcome to viessmann.at homepage info - get ready to check Viessmann best content for Austria right away, or after learning these important things about viessmann.at
Heiz-, Kühl- und Lüftungstechnik, die Lebensräume gestaltet und das Klima schont. Entdecke ganzheitliche Lösungsangebote von Viessmann.
Visit viessmann.atWe analyzed Viessmann.at page load time and found that the first response time was 308 ms and then it took 4.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.
viessmann.at performance score
name
value
score
weighting
Value2.7 s
58/100
10%
Value7.9 s
3/100
25%
Value9.7 s
11/100
10%
Value470 ms
61/100
30%
Value0
100/100
15%
Value9.2 s
32/100
10%
308 ms
617 ms
201 ms
695 ms
203 ms
Our browser made a total of 61 requests to load all elements on the main page. We found that 90% of them (55 requests) were addressed to the original Viessmann.at, 5% (3 requests) were made to Google-analytics.com and 3% (2 requests) were made to Stats.viessmann.com. The less responsive or slowest element that took the longest time to load (1.6 sec) belongs to the original domain Viessmann.at.
Page size can be reduced by 948.5 kB (28%)
3.4 MB
2.4 MB
In fact, the total size of Viessmann.at main page is 3.4 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. 30% of websites need less resources to load. Images take 2.1 MB which makes up the majority of the site volume.
Potential reduce by 101.2 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 101.2 kB or 85% of the original size.
Potential reduce by 24.6 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 447.7 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 447.7 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.at 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 12 (21%)
56
44
The browser has sent 56 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.at
308 ms
www.viessmann.at
617 ms
viessmann.base.fonts.latin.min.css
201 ms
viessmann.base.app.min.css
695 ms
global_js_snippet_head.data.js
203 ms
viessmann.base.lib.modernizr.min.js
301 ms
viessmann.base.lib.min.js
1038 ms
viessmann.base.app.min.js
407 ms
global_js_snippet_body.data.js
207 ms
trackingCode.js
106 ms
icon-wohngebaeude-white.png
156 ms
icon-gewerbe-white.png
157 ms
icon-industrie-white.png
152 ms
icon-kommunen-white.png
150 ms
icon-login.png
151 ms
viessmann-logo.png
155 ms
Viessmann-Wohngebaeude-01.jpg
608 ms
Mittelkessel-XL.jpg
932 ms
Kuehlmoebel-Gewerbe-XL.jpg
1222 ms
Kuehl-_Tiefkuehlzellen.jpg
924 ms
Viessmann-Industrie.jpg
815 ms
Kommune-Biogas-XL.jpg
1229 ms
karriere.jpg
809 ms
VN_Wien_312_350.jpg
1013 ms
invitech-online-magazin.jpg
920 ms
Login-Marktpartnerportal.jpg
1025 ms
Fachberatung.jpg
1134 ms
erp-labeling.jpg
1032 ms
Service_Offensive_312x350_f.jpg
1217 ms
Viessmann-App-Angebot.jpg
1226 ms
Welche_Heizung.jpg
1135 ms
Partner-vor-Ort.jpg
1330 ms
Kachel_Community_Image%20Text%20Tile.jpg
1333 ms
referenzen.jpg
1419 ms
edelstahl-waermetauscher.jpg
1420 ms
Bedienungsanleitungen.jpg
1326 ms
messen.jpg
1327 ms
Viessmann-Selection-Shop.jpg
1526 ms
icon-footer-community-xl.png
1430 ms
icon-footer-invitech-magazin-xl.png
1430 ms
icon-footer-facebook-xl.png
1432 ms
icon-footer-twitter-xl.png
1520 ms
icon-footer-youtube-xl.png
1520 ms
icon-footer-google-xl.png
1532 ms
icon-footer-instagram-xl.png
1470 ms
icon-footer-linkedin-xl.png
1471 ms
wtid.js
482 ms
analytics.js
14 ms
icon-footer-xing-xl.png
1480 ms
icon-footer-kununu-xl.png
1480 ms
viessmann_logo_footer.png
1480 ms
UniversLTW01-55.woff
1587 ms
UniversLTW01-45.woff
1618 ms
UniversLTW01-57.woff
1490 ms
collect
13 ms
collect
15 ms
facebooktile.facebookTileContent.htx
1018 ms
dcs.gif
97 ms
twittertile.twitterTileContent.htx
992 ms
icon-kachel-facebook-xl.png
925 ms
icon-kachel-twitter-xl.png
851 ms
viessmann.at 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.at best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Displays images with incorrect aspect ratio
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Page has valid source maps
viessmann.at 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
DE
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Viessmann.at can be misinterpreted by Google and other search engines. Our service has detected that German 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.at 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.at
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: