01Top pick
AC repair
Warm air from the vents, ice on the copper line or an outdoor unit that hums but won't start. Summer same-day slots kept free every morning.
$89 diagnostic (sample)Book
Houston · AC, heating & humidity
Set the temperature. See the fix.
Turn the dial to how warm your house feels right now. Gulfmark shows you the likely cause, the service that fixes it and what it costs, before anyone knocks on your door.
How warm does your house feel right now?
Drag the dial, scroll over it, or use the arrow keys.
78°INSIDE
Your comfort plan
Gulf summer: keep the AC ahead of the humidity
Most likely visit
$129
AC tune-up · sample price
TACLA 000417CTexas Air Conditioning & Refrigeration Contractor license (sample number)Check the TDLR register
EPA 608 certifiedEvery technician who handles refrigerantWhat EPA 608 means
4.9 on Google612 reviews, as of Oct 2026 (sample)
24/7 phonesAfter-hours visits add a $79 fee (sample). We tell you before we drive out.
Services · sorted by your dial
What your house needs at 78°F
The list reorders as you turn the dial. Hot and sticky puts AC repair and humidity first. Cold puts the heating check on top. Every price is a sample with what changes it.
78°FTry it here
02Top pick
Humidity control
Houston air can feel clammy even at 75. A whole-home dehumidifier pulls the moisture out, so you can set the thermostat higher and still sleep well.
From $2,350 installed (sample)Book
03Top pick
AC replacement
Sized with a Manual J load calculation, not a guess. SEER2-rated systems on the new lower-impact refrigerants, with a written quote you can compare.
From $7,400 (sample)Quote
04Top pick
Ducts & air quality
Attic ducts in Houston bake at 130°F and leak cool air. We test them, seal the gaps and fit a better filter cabinet so dust stops settling.
Duct test $149 (sample)Book
05Top pick
Heat pump install
One system that cools all summer and heats through mild Gulf winters. We show running costs side by side with your current setup before you decide.
From $8,900 (sample)Quote
06Top pick
Heating tune-up
Before the first cold front: furnace or heat strips checked, burners cleaned, gas connections leak-tested and a carbon monoxide reading taken.
$119 per visit (sample)Book
Maintenance plans
Flip a switch, stay ahead of August
Three plans, billed monthly, cancel with 30 days' notice. Prices are samples as of Oct 2026.
Gulf Comfort
$19 /month (sample)
$228 a year, billed monthly. No setup fee.
Plan prices are samples. Repair discounts apply to parts and labor.Join this plan
Financing · sample terms
A monthly number, with the whole truth next to it
Every monthly figure here shows the APR, the term and the total you would pay. Pick a sample system and a term to see them change.
System price (sample)
Term
Example monthly payment
$208/month for 60 months
- APR (sample)
- 9.99%
- Down payment
- $0
- Finance charge
- $2,690
- Total you pay
- $12,490
Sample terms as of Oct 2026, for illustration only. Subject to credit approval by a third-party lender. Your APR may be higher or lower. Fixed rate, no prepayment penalty in this example.
The refrigerant change, in plain words
R-410A is on its way out. Here is what that means for you.
1
Your current AC is fine to repair
Systems that run on R-410A can keep being serviced and recharged. Nobody can force you to replace a working unit.
2
New systems use A2L refrigerants
Since 1 Jan 2025, new home AC and heat pump systems are built for R-454B or R-32. They warm the planet far less if they leak, and they are rated "mildly flammable", so they need trained hands and the right tools.
3
We tell you which one you are getting
Some older R-410A stock can still be installed. Every Gulfmark quote names the refrigerant, so you can compare like with like.
As of Oct 2026. Rules can change: check the EPA's current guidance.
Global warming potential (lower is better)
Commonly cited 100-year GWP values. A 1 lb leak of R-410A has roughly the warming effect of about a ton of CO2.
Image slot: outdoor condenserReviews · samples
What it was like outside when we showed up
Each review shows where it was posted and when. These are sample reviews written for this concept.
OUTSIDE 98°F
Called at 7am with the house at 86. Dario was there by 10, found a dead capacitor, showed it to me and had us cooling before lunch. The price matched what the site said.
Marisol T., Katy · Google · Aug 2026 (sample)
OUTSIDE 91°F
They talked me out of a new system. Sealed the attic ducts and added a dehumidifier instead, and the upstairs finally feels like the downstairs.
Kevin O., The Heights · Yelp · Sep 2026 (sample)
OUTSIDE 41°F
Heat strips quit during the January freeze. Wait was longer than I hoped, but they called with an honest time and the after-hours fee was explained up front.
Priya R., Pearland · Nextdoor · Jan 2026 (sample)
Questions
Straight answers
Is there still a federal tax credit for a new AC or heat pump?
No. The federal 25C credit ended for systems installed after 31 Dec 2025, so we never promise it. If you installed earlier, ask a tax professional. IRS page.
Are there local rebates?
Some utility and electricity-provider programs offer rebates on efficient systems. Amounts change often, so we check at quote time and never count a rebate as certain. ENERGY STAR rebate finder, check current amounts.
What does an after-hours visit cost?
The $89 diagnostic plus a $79 after-hours fee (both samples) on nights, Sundays and holidays. We say it on the phone before we send anyone.
What should I set my thermostat to in summer?
Many utilities suggest around 78°F when you are home. If 78 feels sticky, the problem is often humidity, not temperature, and that is fixable.
Smell gas? Leave the house now, then call your gas company's emergency line or 911 from outside. Don't switch lights on or off.
CO alarm sounding? Get everyone outside into fresh air and call 911.