Why your HVAC website gets slow in a heatwave
Your server builds only so many pages at a time, and a heatwave sends everyone at once. The rest wait in line.
The EIA’s April 2026 outlook forecasts about 1,610 cooling degree days this year, 4% more than 2025. The third quarter alone runs 8% above last year.
The person searching that week is not planning a project. His system quit this afternoon. He calls whoever’s page loads.
What actually runs out on a shared host
Your host runs a set number of helpers. WP Engine’s support doc, updated 28 July 2025, compares them to cashiers in a store. When they are all busy, requests pile up. WP Engine says a request pushed out of that backlog returns a 504. One that gets killed returns a 502.
Kinsta’s docs, updated 11 May 2026, give a WP 5 plan 4 helpers per site. That is four at once, against a hot Saturday. Apache 2.4’s docs set the default limit to 256 in prefork mode. Past that, connections queue. The visitor sees how long the server takes to send the first part of the page.
Kinsta also says addresses with query strings, including Facebook click ids and email tracking tags, skip the page cache. The clicks you pay for go straight to the cashiers.
Google’s HTTP status codes doc, updated 4 February 2026, says it checks a site less often after repeated 5xx and 429 responses. Pages that keep returning a server error come out of the index. Google’s public speed record for you is a rolling 28 day average, updated daily (Chrome UX Report docs, 11 February 2025). One bad week sits in it for four more.
Why a static page does not slow down under a traffic spike
We build sites as finished files, on one pinned Astro version. Astro’s docs say the whole site is prerendered by default and static HTML pages go to the browser. Nothing is assembled when a visitor arrives, so there is no line to join.
The WordPress requirements page, last modified 7 May 2026, lists PHP 8.3 or higher and MariaDB 10.11+ or MySQL 8.0+. The database holds your content and settings. Both have to run for every request the cache misses.
We do not publish client results, so the site we can point at in full is ours. It scores 100 on Google’s PageSpeed test on desktop and mobile. Static files will not fix a booking form run by someone else, or shrink the giant photo of your truck. A rebuild takes days. It will not save an afternoon you are already down. How we build.
The second opinion page most HVAC sites are missing
Our view, not a measured fact: the most valuable page on an HVAC site in July is the one for the homeowner holding a replacement quote he is not sure about. Almost nobody has that page.
Put on it:
- what you charge to come look, in dollars
- what you check when you get there
- how long it takes
- whether the person looking also sells replacements
- that you will say plainly if the first company was right
Sometimes the first quote is correct. Say so on the page, or nothing else on it gets believed. Never make anyone call to find out what a second opinion costs.
Use the words people in your town actually type
The same machine has different names in different places. EIA’s 2020 residential survey, published 31 May 2022, found 88% of US households use air conditioning: 93% in the South, 92% in the Midwest, 73% in the West, 49% in the marine climate along the West Coast.
Examples, not data: swamp cooler in the dry West, mini split against ductless, heater against furnace, AC unit against air conditioner. Do not take our list for it. Type your service and your town into Google, then read the suggestions it hands you. Keep one name per service, on your site and on your Google Business Profile.
Check your tax credit page: 25C and 25D have ended
Most HVAC sites still advertise credits that stopped applying. The IRS Residential Clean Energy Credit page, reviewed 4 July 2026, says: “The credit is not available for any property placed in service after December 31, 2025.” The IRS Energy Efficient Home Improvement Credit page, reviewed 28 April 2026, says: “The credit is allowed for qualifying property placed in service on or after Jan. 1, 2023, and before December 31, 2025.” That page lists the caps stale sites still quote: $2,000 a year for heat pumps, $600 for an air conditioner, $600 for a furnace. Both ended under Public Law 119-21, signed 4 July 2025, commonly called the One, Big, Beautiful Bill.
The IRS’s own FAQ page, reviewed 18 January 2026, still said the credits ran to 2033. That contradicts the two pages above and is not the authority. If a federal page sat wrong for months, a contractor site will too.
Search your own site for “tax credit”, “$2,000” and “25C”. We do not give tax advice.
What a fast site will not do for you
Google’s page experience doc, updated 10 December 2025, says its speed measurements are used by its ranking systems. The same doc says there is no single signal, and good scores do not ensure a top position.
The only careful speed test we can name is Vodafone’s: a 31% better largest-content load time went with 8% more total sales in a split test (web.dev case study, 17 March 2021), and that was a European telecom store, not a US HVAC contractor. We do not publish client results either. A fast page still does not answer the phone or show up on the roof.
Run Google’s PageSpeed Insights on your own site, from your phone. Write down the mobile number.
The pricing page lists all three tiers, what each includes, and the work that stays separate.