What are the opening hours?

Monday 7:30am - 4pm Tuesday 7:30am - 4pm Wednesday 7:30am - 4pm Thursday 7:30am - 4pm Friday 7:30am - 4pm

G Cullum Heating and Cooling

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United States
Rising Sun, MD
G Cullum Heating and Cooling

Our team prides itself on our strong work ethic, honesty, and reliability. We are available 24/7.

With over 35 years of experience, I am a licensed Master Mechanic and fully licensed and insured to operate in Maryland, Delaware, and Pennsylvania. Our team handles both residential and commercial work across Cecil and Harford Counties, as well as parts of Pennsylvania and Delaware. We provide 24-hour emergency services outside of our regular office hours. Simply call our main number, 410-658-9775 and you'll be connected to our on-call technician.

11/09/2026

🔧 HVAC TIP MONDAY! 🔧

Do you know where your HVAC shutoff switch is located? 👀

Knowing how to safely shut off your system can be helpful in an emergency or before certain types of service.

Below are a few examples of what your shutoff switch might look like. Keep in mind, styles and locations can vary depending on your system!

Do you know where yours is? Let us know in the comments! ⬇️

11/06/2026

⭐ CUSTOMER SHOUTOUT! ⭐

Thank you so much for your very kind words, Michael! We truly appreciate your support and are grateful you chose G Cullum HVAC!

Your feedback means the world to our team! ❤️

11/05/2026

🌙 YES OR NO?? 🌡️

Do you turn your thermostat DOWN at night when you go to bed? 🛌

Or do you keep it at the same temperature all day and night?

We want to know! Drop your answer in the comments! 👇

11/05/2026

🔧 CHECK THIS OUT! 🔧

We took advantage of a slower day to squeeze in some in-house training with Gary M. & Ethen!

They walked the office team through the inside components of a Rheem Gas Furnace, giving everyone a closer look and a chance to learn more about what keeps these systems running!

We love taking the time to learn, grow, and sharpen our skills as a team! 💪

11/04/2026

🎄✨ HOW EARLY IS TOO EARLY FOR CHRISTMAS LIGHTS?! ✨🎄

We might be a little early, but we're definitely not complaining! 😂

A HUGE thank-you to Elite Power Washing LLC for coming out and putting up our Christmas lights on the office building! We are SO happy with how everything turned out! ❤️

We're officially getting into the Christmas spirit here at G Cullum HVAC! 🎅🎄

What do you think… too early or just right?! 👇

10/30/2026

🚨 CHECK THIS OUT!! 🚨

Our service tech, Gary, thought this was going to be a normal oil boiler maintenance… BUT this one turned into a 4-hour job! 😳

After hours of hard work, this boiler is nice, clean, and ready to keep this homeowner’s house warm all winter! 🔥🏠

Great work, Gary! 👏

Need your heating system ready for winter? Give G Cullum HVAC a call! 📞

10/29/2026

⁉ WE WANT TO KNOW! ⁉

Do you sleep with the FAN ON or OFF at night? 😴🛏️

👇 Let us know in the comments!
Are you a FAN ON person or a FAN OFF person? 😂

10/26/2026

🔧 MAINTENANCE TIP MONDAY! 🔧

ALWAYS schedule professional maintenance if you hear, see, or smell anything unusual with your HVAC system! 👀👂👃

Don’t ignore the warning signs—getting it checked out early can help prevent bigger problems down the road! 🏠🔧

10/26/2026

📣💙 FAMILY TIME! 💙📣

Gary C. got to watch his granddaughter, Audrey, cheer this past weekend! 🎀📣

Way to go, Audrey! 👏🎉

Address

776 Joseph Biggs Memorial Highway
Rising Sun, MD
21911

Opening Hours

Monday	7:30am - 4pm
Tuesday	7:30am - 4pm
Wednesday	7:30am - 4pm
Thursday	7:30am - 4pm
Friday	7:30am - 4pm

Telephone

+14106589775

Website

http://www.gcullumhvac.com/

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