3.2 sec in total
362 ms
2.6 sec
278 ms
Click here to check amazing Viessmann content for Spain. Otherwise, check out these important facts you probably never knew about viessmann.es
El Grupo Viessmann es uno de los líderes mundiales en la fabricación de sistemas de calefacción y climatización para el residencial, comercial e industrial.
Visit viessmann.esWe analyzed Viessmann.es page load time and found that the first response time was 362 ms and then it took 2.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.
viessmann.es performance score
name
value
score
weighting
Value2.4 s
69/100
10%
Value9.6 s
0/100
25%
Value11.0 s
6/100
10%
Value500 ms
58/100
30%
Value0
100/100
15%
Value8.7 s
36/100
10%
362 ms
519 ms
190 ms
680 ms
193 ms
Our browser made a total of 36 requests to load all elements on the main page. We found that 92% of them (33 requests) were addressed to the original Viessmann.es, 6% (2 requests) were made to Stats.viessmann.com and 3% (1 request) were made to Fast.fonts.net. The less responsive or slowest element that took the longest time to load (1.1 sec) belongs to the original domain Viessmann.es.
Page size can be reduced by 870.5 kB (30%)
2.9 MB
2.0 MB
In fact, the total size of Viessmann.es main page is 2.9 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. 15% of websites need less resources to load. Images take 1.7 MB which makes up the majority of the site volume.
Potential reduce by 55.6 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 55.6 kB or 83% of the original size.
Potential reduce by 30.1 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 409.9 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 409.9 kB or 71% 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.es 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 6 (19%)
31
25
The browser has sent 31 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 7 to 1 for JavaScripts and as a result speed up the page load time.
viessmann.es
362 ms
www.viessmann.es
519 ms
viessmann.base.fonts.latin.min.css
190 ms
viessmann.base.app.min.css
680 ms
global-js-snippet-head.data.js
193 ms
viessmann.base.lib.modernizr.min.js
314 ms
viessmann.base.lib.min.js
547 ms
viessmann.base.app.min.js
325 ms
global-js-snippet-body.data.js
195 ms
trackingCode.js
75 ms
icon-wohngebaeude-white.png
102 ms
icon-gewerbe-white.png
112 ms
icon-industrie-white.png
100 ms
icon-kommunen-white.png
99 ms
viessmann-logo.png
120 ms
Viessmann-Wohngebaeude-01.jpg
861 ms
Mittelkessel-XL.jpg
1051 ms
Viessmann-Industrie.jpg
773 ms
Kommune-Biogas-XL.jpg
1053 ms
Login-Marktpartnerportal.jpg
317 ms
Service_Offensive_312x350_f.jpg
333 ms
Welche_Heizung.jpg
426 ms
edelstahl-waermetauscher.jpg
581 ms
Partner-vor-Ort.jpg
636 ms
erp-labeling.jpg
655 ms
Viessmann-App-Angebot.jpg
848 ms
Heizkosten.jpg
871 ms
referenzen.jpg
965 ms
Bedienungsanleitungen.jpg
1061 ms
Viessmann-Selection-Shop.jpg
963 ms
viessmann_logo_footer.png
978 ms
wtid.js
464 ms
UniversLTW01-55.woff
1101 ms
UniversLTW01-45.woff
1094 ms
UniversLTW01-57.woff
1024 ms
dcs.gif
107 ms
viessmann.es 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.es best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Missing source maps for large first-party JavaScript
viessmann.es SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Links do not have descriptive text
Image elements do not have [alt] attributes
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
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
Tap targets are not sized appropriately
ES
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Viessmann.es can be misinterpreted by Google and other search engines. Our service has detected that Spanish 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.es 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.es
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: