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deljoheating.com screenshot

Report Summary

  • 91

    Performance

    Renders faster than
    91% of other websites

  • 66

    Accessibility

    Visual factors better than
    that of 31% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 78

    SEO

    Google-friendlier than
    39% of websites

deljoheating.com

Deljo Heating and Cooling - A Century of Chicago HVAC

Page Load Speed

244 ms in total

First Response

30 ms

Resources Loaded

214 ms

Page Rendered

0 ms

deljoheating.com screenshot

About Website

Welcome to deljoheating.com homepage info - get ready to check Deljo Heating best content right away, or after learning these important things about deljoheating.com

Deljo Heating & Cooling has kept Chicagoans comfortable since 1922. With thousands of 5-star reviews, Deljo is the only HVAC company you'll ever need.

Visit deljoheating.com

Key Findings

We analyzed Deljoheating.com page load time and found that the first response time was 30 ms and then it took 214 ms 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.

Performance Metrics

deljoheating.com performance score

91

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.3 s

98/100

10%

LCP (Largest Contentful Paint)

Value2.8 s

83/100

25%

SI (Speed Index)

Value1.3 s

100/100

10%

TBT (Total Blocking Time)

Value180 ms

91/100

30%

CLS (Cumulative Layout Shift)

Value0.072

96/100

15%

TTI (Time to Interactive)

Value4.2 s

85/100

10%

Network Requests Diagram

deljoheating.com

30 ms

deljoheating.com

96 ms

plugin.contractorcommerce.com

101 ms

blank.png

16 ms

logo.png

55 ms

Our browser made a total of 6 requests to load all elements on the main page. We found that 83% of them (5 requests) were addressed to the original Deljoheating.com, 17% (1 request) were made to Plugin.contractorcommerce.com. The less responsive or slowest element that took the longest time to load (101 ms) relates to the external source Plugin.contractorcommerce.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 144.7 kB (72%)

Content Size

200.4 kB

After Optimization

55.8 kB

  • HTML
  • Images

In fact, the total size of Deljoheating.com main page is 200.4 kB. This result falls within a vast category (top 1 000 000) of heavyweight, probably not optimized, and thus slow loading web pages. Only a small number of websites need less resources to load. HTML takes 167.5 kB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 133.9 kB

  • Original 167.5 kB
  • After minification 161.8 kB
  • After compression 33.6 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 133.9 kB or 80% of the original size.

Image Optimization

-33%

Potential reduce by 10.7 kB

  • Original 32.9 kB
  • After minification 22.2 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, Deljo Heating needs image optimization as it can save up to 10.7 kB or 33% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

Requests Breakdown

We found no issues to fix!

Requests Now

4

After Optimization

4

  • Images
  • JavaScript

The browser has sent 4 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Deljo Heating. According to our analytics all requests are already optimized.

Network Requests Diagram

deljoheating.com

deljoheating.com

30 ms

deljoheating.com

deljoheating.com

96 ms

plugin.contractorcommerce.com

plugin.contractorcommerce.com

101 ms

blank.png

blank.png

16 ms

logo.png

logo.png

55 ms

tab-arrow.png

tab-arrow.png

24 ms

Accessibility Review

deljoheating.com accessibility score

66

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.

High

[role]s are not contained by their required parent element

High

[aria-*] attributes do not have valid values

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

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

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

Best Practices

deljoheating.com best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

deljoheating.com SEO score

78

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Links do not have descriptive text

High

Image elements do not have [alt] attributes

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

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

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Deljoheating.com 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 Deljoheating.com 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.

Social Sharing Optimization

deljoheating.com

Open Graph data is detected on the main page of Deljo Heating. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: