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Tonnage Calculator AC

Calculate the right AC tonnage your room needs. Accounts for climate zone, ceiling height, occupancy, sun exposure, insulation, and more.

Added June 19, 2026 · Last analysed June 19, 2026 · via

Own this Launch?
Screenshot of Tonnage Calculator AC

StackScope records what new websites are built with, the week they launch. Most we find ourselves, by watching public internet infrastructure for brand-new sites; the rest come from Product Hunt, Hacker News and PeerPush. We crawled this one for its tech stack and scored it for launch readiness: DNS, security headers, SEO basics. This page is what we saw on 19 June 2026; the live site may have changed since.

Every technology below links to its own page: which other new sites launched with it. Vendors and agencies watch those pages with Stackdar and hear about new adopters the week they ship, from £15 a month.

Tonnage Calculator AC has the basics covered well, with complete legal pages, a thorough launch checklist, and well-configured email security. Worth fixing first: missing several security headers.

Launched on Product Hunt on June 19, 2026. The site is served through Cloudflare, with a domain registered in 2025. Our crawler found 7 technologies on this site, covering CDN, CSS frameworks, DNS providers, and email forwarding. The stack includes React, Tailwind CSS, and Cloudflare.

It's also running the same core stack as 304 other launches.

If you own this site, refresh the snapshot and see the full fix list any time →

6.9
StackScope Score
Good
90/100 Launch Readiness
Launch ready
0/6 Security Headers
Poor
3/3 Legal
Complete
2/2 Crawl files
Complete
100/100 Performance
Fast
Vibe Score 0 · No AI signals
How much the site looks AI-generated. Informational pattern-match signal, not a verdict. Does not feed the StackScope Score. See which fingerprints fired →

Tech Stack (7)

Infrastructure
CDN Cloudflare
DNS Cloudflare DNS
Protocol HTTP/3
Email
Email forwarding Cloudflare Email Routing (2)
Build & Framework
CSS framework Tailwind CSS
Framework React
Analytics & Marketing
SEO Google Search Console

Infrastructure

Network
CLOUDFLARENET - Cloudflare, Inc., US
AS13335 · US
DNS
Cloudflare DNS
Authoritative nameserver
DNSSEC
Not enabled
DNS responses unsigned. Cache-poisoning vulnerable.
Green hosting
Green hosted
Host runs on renewable energy. Data from The Green Web Foundation.
SSL Certificate
Google Trust Services
Valid 25 May 2026 to 23 Aug 2026
Certificate as captured in this snapshot, not a live check.
Domain Age
1 year
Registered Apr 2025 · HOSTINGER operations, UAB

Email Security

✓
SPF ~all Soft-fail (~all). Common and accepted.
?
DKIM Not detected at common selectors. Your provider may use a custom one.
✓
DMARC p=reject Reject (strict). Strong.
?
MTA-STS Not deployed. Mail to your domain can be downgraded to plaintext en route.
?
TLS-RPT Not configured. You won't hear about silent SMTP TLS handshake failures.

Storage (0)

This site uses no client-side storage we could detect on page load.

Readiness Breakdown How?

✓ Custom title and meta description
⚠
Open Graph tags (title, image, description) (partial) missing og:image
✓ Twitter card meta tags
✓ Canonical URL declared
✓ Responsive viewport meta tag
✓ Favicon present
✓ Semantic HTML (nav, main, article)
⚠
Page title is 98 characters (advisory) Google only shows about 60 characters of the title in search results; aim for 50–60 to keep the whole thing visible.
⚠
Meta description is 194 characters (advisory) Google only shows about 155–160 characters of the description in desktop search results (less on mobile); anything past that won't appear.

Performance How?

268 ms Server response
53% Faster than peers
472 ms Largest contentful paint
0.00 Cumulative layout shift
333 KB Page weight
83 KB Image weight
1 Third-party domains
5 Console errors
5 Failed requests

⚠ 2 images: 2 oversized

Broken first-party requests (5), worth fixing
  • 404 /cookie-policy/__next.cookie-policy.__PAGE__.txt?_rsc=H3vY_adzzFFGlSFN
  • 404 /about/__next.about.__PAGE__.txt?_rsc=hzcUC6YqarYE9pKE
  • 404 /ton-to-btu-converter/__next.ton-to-btu-converter.__PAGE__.txt?_rsc=O1Dc6HyNovA2lqng
  • 404 /contact/__next.contact.__PAGE__.txt?_rsc=BiuOixuigeBXVJn7
  • 404 /methodology/__next.methodology.__PAGE__.txt?_rsc=Gg5dBYhAsxoUJMJw

Indicative grade from a single automated render, not a substitute for Lighthouse or field data, and not part of the StackScope score.

AI Stance

No AI stance declared
✗ llms.txt published
✓ No AI bots blocked in robots.txt
Content-Signal
? No directive declared
Link headers
? None advertised

Well-Known Files

✓ robots.txt
✓ sitemap.xml (8 URLs)
✗ security.txt
✗ llms.txt
✗ ads.txt
✗ humans.txt

Legal

✓ Privacy Policy
/privacy-policy
✓ Terms of Service
/terms-of-use
88% unique
Mentions:
Cookies Do Not Sell

Security Headers (0/6)

✗
Referrer-Policy
✗
X-Frame-Options
✗
Permissions-Policy experimental (check browser support)
✗
X-Content-Type-Options
✗
Content-Security-Policy
✗
Strict-Transport-Security
–
X-XSS-Protection deprecated (use Content-Security-Policy)

Build

✓ Code splitting
10 JS files
1 CSS files
1 Third-party domains

Brand Colours

Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.