Comfort Reminders
Never miss a tune-up again.
Most no-heat calls in January trace back to a tune-up that never got booked in September. These reminders fix that: a short note when it’s time, timed for Denver, by email or straight into your calendar.
- Free
- A few emails a season
- Or a calendar file, no email at all
September
Fall furnace tune-up
A heads-up before the first freeze, when the calendar is still open and the $99 tune-up is easy to get.
April
Spring AC check
The same nudge for cooling, before the first hot week fills the schedule.
Monthly
Filter check
Check it, change it if it’s dirty. The single cheapest thing that keeps a system alive. We remind you so the filter doesn’t have to.
As they land
Denver-only tips
Smoke-season filters, cold-snap checks, and rebate deadlines. A few a season, never a sales blast.
Comfort Reminders
Tell us where to send them.
Pick what you care about. Heating only, cooling only, or all of it. We only send what you asked for.
- A nudge in September and April, before the rush
- A filter-check nudge every month
- Rebate deadlines and cold-snap tips, Denver only
Right now in Denver · October
Deep cold. If the furnace short-cycles or the flame looks yellow, call. Keep the filter fresh.
The driest month. Static and nosebleeds mean low humidity; a whole-home humidifier fixes it.
Shoulder season. The best time to book the furnace repair you’ve been putting off: no rush, no line.
Spring AC check month. A tune-up now beats a no-cooling call in July.
The first hot days are coming. Clear the outdoor unit, change the filter, run the AC once.
Heat arrives. If the AC runs all afternoon and never catches up, call before the heat wave.
Peak cooling. Ice on the lines means turn it off and call.
Smoke season. A MERV-13 filter catches what a standard one lets through.
Fall furnace tune-up month. Book before the first freeze and skip the October rush.
First freeze. Test the heat once before you need it. Check the CO detector batteries.
Heating season. Change the filter, open the vents, and book anything that sounded wrong.
Holiday cold snaps. We answer 24/7 and never charge overtime, even on the 25th.
Good questions
Before you sign up.
Short answers. The reminders are free and they stay that way.
How many emails is this?
Two seasonal reminders a year, a one-line filter nudge each month, and the occasional Denver-specific tip. All short, all skimmable, never a sales blast.
Will you sell or share my email?
No. It stays with us, it’s used only for these reminders, and every email has a one-click unsubscribe.
Can I get the reminders without giving an email?
Yes. Download the calendar file and the tune-up and filter reminders land in your own calendar, forever, with no email at all.
Do I have to be a customer?
No. Anyone in the Denver metro can sign up. If a reminder turns into a visit, great; if it just keeps your furnace alive longer, also great.
Who we are
Hello. We’re Duality.
Duality Heating and Air LLC is a Denver heating and cooling company run by one licensed technician and the people he trusts. We fix furnaces, ACs, heat pumps, and the air in your home, and we do it the way we’d want it done at our own house. Comfort, in perfect balance.
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Denver-based
One technician who lives here, not a call center in another state.
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Price in writing
You approve the number before we touch a tool. It never changes.
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Fix before replace
We repair what can be repaired and show you both numbers when it can’t.
Something going on right now?
Skip the reminders and send the form. A Denver dispatcher calls you back in minutes, 24 hours a day.