Analyze Dé terrasverwarmingsspecialist van Nederland

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Page load speed analysis

  • 46/100

    Normal result
  • 5

    Successful tests
  • 3

    Failed tests
  • First response

    957 ms

  • Resources loaded

    33.7 sec

  • Page rendered

    14.2 sec

  • Total page load time

    48.9 sec

Click here to check amazing Terrasverwarming content. Otherwise, check out these important facts you probably never knew about

We analyzed page load time and found that the first response time was 957 ms and then it took 47.9 sec to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster. Unfortunately, there were 30 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Page optimization

  • HTML 116.4 kB
    Images 547.9 kB
    Javascripts 664.1 kB
    CSS 473.5 kB

    In fact, the total size of main page is 1.8 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. 65% of websites need less resources to load. Javascripts take 664.1 kB which makes up the majority of the site volume.

    • Original 116.4 kB
    • After minification 105.1 kB
    • After compression 15.3 kB

    HTML optimization

    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 101.1 kB or 87% of the original size.

    • Original 547.9 kB
    • After optimization 487.2 kB

    Image optimization

    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. Obviously, Terrasverwarming needs image optimization as it can save up to 60.6 kB or 11% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

    • Original 664.1 kB
    • After minification 634.5 kB
    • After compression 199.0 kB

    JavaScript optimization

    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 465.1 kB or 70% of the original size.

    • Original 473.5 kB
    • After minification 414.2 kB
    • After compression 79.7 kB

    CSS optimization

    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. needs all CSS files to be minified and compressed as it can save up to 393.8 kB or 83% of the original size.

Network requests diagram

  • style.css
  • jquery.fancybox-1.3.4.css
  • modal.css
  • bootstrap.min.css
  • bootstrap-responsive.min.css
  • bootstrap-extended.css
  • calendar-jos.css
  • style.css
  • jquery.min.js
  • jquery-noconflict.js
  • jquery-migrate.min.js
  • mootools-core.js
  • core.js
  • mootools-more.js
  • punycode.js
  • validate.js
  • keepalive.js
  • modal.js
  • vmsite.js
  • jquery.fancybox-1.3.4.pack.js
  • vmprices.js
  • bootstrap.min.js
  • owl.carousel.min.js
  • calendar.js
  • calendar-setup.js
  • general.js
  • modal.js
  • slider.js
  • drag_refactor.js
  • avfind.js
  • update_cart.js
  • ie9-10.css
  • text.css
  • layout.css
  • nav.css
  • typography.css
  • template.css
  • responsive-template.css
  • vm-impress.css
  • style5.css
  • superfish.js
  • supersubs.js
  • webfont.js
  • print.css
  • ga.js
  • loading8.gif
  • bootstrap.css
  • responsive.css
  • camera.css
  • wsk_ls1_small-j
  • tv3_zon-logo.png
  • terrasverwarming-nl.png
  • showroom-265.jpg
  • tv3_cat_template.jpg
  • tv3_cat_gas.jpg
  • tv3_cat_merken.jpg
  • tv3_cat_schakelen.jpg
  • tv3_cat_lampen.jpg
  • solamagic-s2-color-variations_229x229.jpg
  • solamagic_s1_2000_actie_229x229.jpg
  • BTURCAC200V_sm_229x229.jpg
  • solamagic-inbouwframe-5-kleuren_229x229.jpg
  • ntc_229x229.jpg
  • 91003371_229x229.jpg
  • smart2024_bt_229x229.jpg
  • smart2024_bt_black_229x229.jpg
  • smart2024_bt_white_229x229.jpg
  • solamagic-inbouw-9010_229x229.jpg
  • term2000_ip24_229x229.jpg
  • rca200v_new_229x229.jpg
  • 9300011%20s1-anthrazit_229x229.jpg
  • img_3106_229x229.jpg
  • img_3082_229x229.jpg
  • zwenkarm_229x229.jpg
  • schakelaar_3500_229x229.gif
  • 20170725_145714_B_50_229x229.jpg
  • tvhet868a04_229x229.jpg
  • teleco_het6_229x229.jpg
  • s1-afstandsbediening_229x229.jpg
  • hulp-telefoon-icon.png
  • bg-theme-5.jpg
  • cart-icon.png
  • css
  • __utm.gif
  • search-icon.png
  • collect
  • arrows_exp.png
  • open-url.png
  • product-details.png
  • add-to-cart-button.png
  • quantity-arrows-plus.png
  • quantity-arrows-minus.png
  • ga-audiences

Our browser made a total of 94 requests to load all elements on the main page. We found that 93% of them (87 requests) were addressed to the original, 2% (2 requests) were made to and 1% (1 request) were made to The less responsive or slowest element that took the longest time to load (20.8 sec) belongs to the original domain

Additional info on


The browser has sent 61 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Terrasverwarming. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 27 to 1 for JavaScripts and from 22 to 1 for CSS and as a result speed up the page load time.









Possible request optimization











Normal result

IP address

This IP address is dedicated to This is the best domain hosting practice .

Normal result

IP Trace

DNS records

Type Host Target/ip TTL Other
A 145
NS 149
NS 149

3599 Mname:
Serial: 2017022000
Refresh: 86400
Retry: 7200
Expire: 604800
Minimum-ttl: 7200
MX 149 Pri: 5

Language and encoding

Good result


NL nl language flag


NL nl language flag





Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise can be misinterpreted by Google and other search engines. Our service has detected that Dutch is used on the page, and it matches the claimed language. Our system also found out that 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.

HTTPS certificate

SSL Certificate has no SSL certificate. Web browsing can be safer with HTTPS connection, so we suggest that it should be obtained for this site.

Poor result

Visitor World Map

The server of is located in Germany, but, unfortunately, we cannot identify the countries where the visitors come from and thus it’s impossible to define if the distance can potentially affect the page load time.

Good result

Poor result

Social Sharing Optimization

Open Graph description is not detected on the main page of Terrasverwarming. 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:

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