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central-heating.co.nz screenshot

Report Summary

  • 42

    Performance

    Renders faster than
    61% of other websites

  • 75

    Accessibility

    Visual factors better than
    that of 41% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 84

    SEO

    Google-friendlier than
    52% of websites

central-heating.co.nz

Central Heating | Radiant And Underfloor Design And Installations

Page Load Speed

2.3 sec in total

First Response

102 ms

Resources Loaded

1.9 sec

Page Rendered

330 ms

central-heating.co.nz screenshot

About Website

Click here to check amazing Central Heating content. Otherwise, check out these important facts you probably never knew about central-heating.co.nz

Specialists in central heating, radiant heating, underfloor systems, radiators and more. Design and installation of custom systems. Call us for a quote.

Visit central-heating.co.nz

Key Findings

We analyzed Central-heating.co.nz page load time and found that the first response time was 102 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 45% of websites can load faster.

Performance Metrics

central-heating.co.nz performance score

42

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.1 s

45/100

10%

LCP (Largest Contentful Paint)

Value13.5 s

0/100

25%

SI (Speed Index)

Value6.5 s

38/100

10%

TBT (Total Blocking Time)

Value100 ms

98/100

30%

CLS (Cumulative Layout Shift)

Value0.529

14/100

15%

TTI (Time to Interactive)

Value11.7 s

18/100

10%

Network Requests Diagram

central-heating.co.nz

102 ms

www.central-heating.co.nz

962 ms

wp-emoji-release.min.js

78 ms

style.min.css

96 ms

styles.css

99 ms

Our browser made a total of 85 requests to load all elements on the main page. We found that 76% of them (65 requests) were addressed to the original Central-heating.co.nz, 5% (4 requests) were made to Fonts.googleapis.com and 5% (4 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (962 ms) belongs to the original domain Central-heating.co.nz.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.5 MB (73%)

Content Size

2.1 MB

After Optimization

557.8 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Central-heating.co.nz main page is 2.1 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. 55% of websites need less resources to load. Images take 1.6 MB which makes up the majority of the site volume.

HTML Optimization

-76%

Potential reduce by 31.6 kB

  • Original 41.7 kB
  • After minification 40.2 kB
  • After compression 10.1 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 31.6 kB or 76% of the original size.

Image Optimization

-91%

Potential reduce by 1.4 MB

  • Original 1.6 MB
  • After minification 140.7 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, Central Heating needs image optimization as it can save up to 1.4 MB or 91% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-10%

Potential reduce by 39.3 kB

  • Original 405.3 kB
  • After minification 405.3 kB
  • After compression 366.0 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. This website has mostly compressed JavaScripts.

CSS Optimization

-4%

Potential reduce by 1.8 kB

  • Original 42.8 kB
  • After minification 42.8 kB
  • After compression 41.0 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. Central-heating.co.nz has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 45 (61%)

Requests Now

74

After Optimization

29

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 74 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Central Heating. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 23 to 1 for JavaScripts and from 15 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

central-heating.co.nz

central-heating.co.nz

102 ms

www.central-heating.co.nz

www.central-heating.co.nz

962 ms

wp-emoji-release.min.js

wp-emoji-release.min.js

78 ms

style.min.css

style.min.css

96 ms

styles.css

styles.css

99 ms

style.css

style.css

101 ms

css

css

37 ms

css

css

58 ms

font-awesome.css

font-awesome.css

105 ms

magnific-popup.css

magnific-popup.css

98 ms

style.css

style.css

111 ms

oceanic-woocommerce-style.css

oceanic-woocommerce-style.css

127 ms

oceanic-header-standard.css

oceanic-header-standard.css

132 ms

jquery.bxslider.css

jquery.bxslider.css

131 ms

css

css

55 ms

addtoany.min.css

addtoany.min.css

132 ms

jquery.js

jquery.js

163 ms

jquery-migrate.min.js

jquery-migrate.min.js

143 ms

addtoany.min.js

addtoany.min.js

157 ms

page.js

page.js

48 ms

api.js

api.js

42 ms

api.js

api.js

67 ms

jquery.form.min.js

jquery.form.min.js

121 ms

scripts.js

scripts.js

122 ms

navigation.js

navigation.js

121 ms

jquery.carouFredSel-6.2.1-packed.js

jquery.carouFredSel-6.2.1-packed.js

139 ms

custom.js

custom.js

150 ms

myapp.js

myapp.js

152 ms

jquery.magnific-popup.js

jquery.magnific-popup.js

155 ms

jquery.bxslider.js

jquery.bxslider.js

156 ms

skip-link-focus-fix.js

skip-link-focus-fix.js

155 ms

wp-embed.min.js

wp-embed.min.js

171 ms

font-awesome.min.css

font-awesome.min.css

126 ms

css

css

18 ms

recaptcha__en.js

recaptcha__en.js

153 ms

body_bg.gif

body_bg.gif

98 ms

logo_main.png

logo_main.png

132 ms

img4.png

img4.png

302 ms

img3.png

img3.png

278 ms

img2.png

img2.png

277 ms

001.jpg

001.jpg

131 ms

Warrent_boiler1-1.gif

Warrent_boiler1-1.gif

149 ms

family.jpg

family.jpg

148 ms

money.jpg

money.jpg

148 ms

family2.jpg

family2.jpg

239 ms

baxi.png

baxi.png

239 ms

bosh.png

bosh.png

239 ms

vokera.png

vokera.png

298 ms

wawre.png

wawre.png

298 ms

feroli.png

feroli.png

299 ms

siemen.png

siemen.png

297 ms

logo-ero.jpg

logo-ero.jpg

298 ms

mp.png

mp.png

327 ms

face-head.png

face-head.png

326 ms

twitter-head.png

twitter-head.png

325 ms

google-head.png

google-head.png

324 ms

sm.25.html

sm.25.html

91 ms

eso.D0Uc7kY6.js

eso.D0Uc7kY6.js

125 ms

ga.js

ga.js

142 ms

analytics.js

analytics.js

231 ms

gtm.js

gtm.js

232 ms

icon_call_header.png

icon_call_header.png

303 ms

navigation_bg.gif

navigation_bg.gif

305 ms

navigation_dividers.gif

navigation_dividers.gif

329 ms

bg-title.png

bg-title.png

329 ms

left-bg-title.png

left-bg-title.png

329 ms

right-bg-title.png

right-bg-title.png

330 ms

call_skype_logo.png

call_skype_logo.png

331 ms

main_footer_bg.gif

main_footer_bg.gif

330 ms

call.gif

call.gif

424 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsg-1x4gaVc.ttf

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsg-1x4gaVc.ttf

183 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsgH1x4gaVc.ttf

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsgH1x4gaVc.ttf

205 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsjZ0B4gaVc.ttf

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsjZ0B4gaVc.ttf

206 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsiH0B4gaVc.ttf

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsiH0B4gaVc.ttf

207 ms

montserrat-regular-webfont.woff

montserrat-regular-webfont.woff

354 ms

montserrat-bold-webfont.woff

montserrat-bold-webfont.woff

355 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

355 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

354 ms

www.central-heating.co.nz

www.central-heating.co.nz

387 ms

ajax-loader.gif

ajax-loader.gif

324 ms

bx_loader.gif

bx_loader.gif

474 ms

arrows.png

arrows.png

321 ms

__utm.gif

__utm.gif

69 ms

collect

collect

48 ms

js

js

60 ms

Accessibility Review

central-heating.co.nz accessibility score

75

Accessibility Issues

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

High

Some elements have a [tabindex] value greater than 0

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

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

central-heating.co.nz best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

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

SEO Factors

central-heating.co.nz SEO score

84

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

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

High

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

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 Central-heating.co.nz 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 Central-heating.co.nz 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

central-heating.co.nz

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