It’s a great question, and the honest answer is that it depends on your audience. Every customer base is a little different, which is why one of the smartest things you can do is ask.
Running short surveys or reviewing your email analytics can tell you exactly when your customers are most likely to open and read your messages. Once you have that data, you can schedule your emails around real behavior instead of guesswork.
That said, industry research does give us some helpful starting points. For HVAC specials and service promotions, emails tend to perform best in the mid-morning (9–11 AM) and again in the early evening (5–8 PM). These timeframes line up with when homeowners are checking personal email—either after getting through the morning rush or once they’re winding down for the day. As for days, Tuesdays, Wednesdays, and Thursdays consistently see higher open and click-through rates.
Best Times of Day to Send HVAC Emails
9 AM to 11 AM
This window often catches people after they’ve cleared out urgent work emails and are settling into their day. It’s a strong time for visibility without competing with overnight inbox clutter.
1 PM to 3 PM
Lunch breaks can work well for B2C emails. People tend to scroll on their phones during downtime, making this a good window for service reminders or special offers.
5 PM to 8 PM
Evenings are one of the most effective times for HVAC marketing emails. Homeowners are off work, at home, and more likely to open emails on their phones—especially if the message is relevant to comfort, repairs, or upcoming weather.
Best Days of the Week
Tuesday through Thursday
These are typically the strongest days for email engagement. Inboxes are more manageable, and people are more receptive to promotional messages.
Mondays
Mondays are often overloaded with emails from the weekend, and most people are focused on catching up. HVAC promotions tend to get overlooked.
Weekends
Engagement is usually lower for service-related emails, although Sunday evenings can sometimes perform well as homeowners plan for the week ahead.
Key Takeaways for HVAC Email Marketing
The most important thing to remember is that these are benchmarks, not rules, so testing is essential. Use your email platform’s analytics to experiment with send times and days until you find what consistently works best. (Try the ShorelineCRM for Email Marketing)
It’s also smart to send emails based on the recipient’s local time zone, so your message lands at the right moment. And whenever possible, match your timing with urgency—like promoting A/C tune-ups before a heat wave or heating checks before temperatures drop.
Finally, timing helps, but it’s only part of the equation. Strong subject lines, clear messaging, and offers that actually matter to homeowners are what turn opens into calls and bookings.
If you need some help marketing your heating and cooling company, let us know! Contact us Today!
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