2.3 sec in total
145 ms
957 ms
1.2 sec
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Visit hvacclasses.orgWe analyzed Hvacclasses.org page load time and found that the first response time was 145 ms and then it took 2.2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.
hvacclasses.org performance score
name
value
score
weighting
Value2.5 s
69/100
10%
Value3.5 s
63/100
25%
Value4.7 s
68/100
10%
Value2,560 ms
4/100
30%
Value0.007
100/100
15%
Value7.1 s
52/100
10%
145 ms
425 ms
34 ms
91 ms
95 ms
Our browser made a total of 32 requests to load all elements on the main page. We found that 88% of them (28 requests) were addressed to the original Hvacclasses.org, 6% (2 requests) were made to Google-analytics.com and 3% (1 request) were made to Stats.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (425 ms) belongs to the original domain Hvacclasses.org.
Page size can be reduced by 147.9 kB (39%)
376.1 kB
228.2 kB
In fact, the total size of Hvacclasses.org main page is 376.1 kB. 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 195.4 kB which makes up the majority of the site volume.
Potential reduce by 112.0 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 112.0 kB or 76% of the original size.
Potential reduce by 34.9 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. Obviously, HVAC Classes needs image optimization as it can save up to 34.9 kB or 18% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 850 B
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. This website has mostly compressed JavaScripts.
Potential reduce by 124 B
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. Hvacclasses.org needs all CSS files to be minified and compressed as it can save up to 124 B or 26% of the original size.
Number of requests can be reduced by 8 (31%)
26
18
The browser has sent 26 CSS, Javascripts, AJAX and image requests in order to completely render the main page of HVAC Classes. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and as a result speed up the page load time.
hvacclasses.org
145 ms
www.hvacclasses.org
425 ms
analytics.js
34 ms
cssua.min.js
91 ms
html5shiv.js
95 ms
jquery.js
163 ms
functions.js
127 ms
search-box.js
127 ms
wp-embed.min.js
129 ms
jquery-validate.js
128 ms
jquery.ui.totop.js
129 ms
logo.png
160 ms
map-home-462x328.png
193 ms
s.png
159 ms
Untitled-3.jpg
190 ms
Screen-Shot-2021-10-07-at-2.56.47-PM-1.png
194 ms
ac-technician-274x178.jpg
193 ms
refrigeration-technician-247x178.jpg
223 ms
hvac-installer-274x178.jpg
193 ms
pennfoster-logo-300x100.png
194 ms
hcc-421x299.jpg
220 ms
boiler-room-heating-system-200x200.jpg
222 ms
collect
16 ms
collect
28 ms
ga-audiences
60 ms
top-booten.png
35 ms
webkit-speed.css
34 ms
roboto-regular-webfont.woff
34 ms
roboto-light-webfont.woff
33 ms
opensans-regular_0.woff
64 ms
akzidenzgroteskbe-lightcn.woff
34 ms
877807618-akzidenzgroteskbe-lightcn.svg
68 ms
hvacclasses.org 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.
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Heading elements are not in a sequentially-descending order
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.
hvacclasses.org 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
hvacclasses.org SEO score
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
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Hvacclasses.org can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Hvacclasses.org 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.
hvacclasses.org
Open Graph data is detected on the main page of HVAC Classes. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: