Johnstone Supply of New Castle, Delaware

Johnstone Supply of New Castle, Delaware Johnstone Supply is a wholesale distributor serving HVACR professionals. Johnstone Supply is a wholesale distributor serving professional HVACR contractors.

Johnstone has the largest selection of equipment and genuine OEM parts in the industry. We have replacements for nearly every major brand and an extensive cross reference that makes sourcing hard-to-find parts easy. Johnstone Supply: Making it Easier to do Business.

09/08/2026

Our teammate Randy Ambroselli, Technical Service Advisor, is putting a common HVAC myth to the test! 🧪

Think you can wait to replace your air filter? Randy breaks down what the science says—and why timely filter changes matter for airflow, efficiency and indoor air quality.

Watch the reel, then tell us: What HVAC myth should Randy test next? 👇

⚡ The September Power Deal is here! ⚡Save $25 on the PRO1 Universal Wi-Fi Thermostat when you purchase online or through...
09/04/2026

⚡ The September Power Deal is here! ⚡

Save $25 on the PRO1 Universal Wi-Fi Thermostat when you purchase online or through the new Johnstone Supply mobile app!

Log in now to claim this exclusive September deal on a versatile thermostat designed to fit a wide range of systems.

📅 September 1–30, 2026
📱 Online & Mobile App Exclusive
⚠️ While supplies last.

Log in. Add to cart. Save $25.

🚨 DON’T WAIT UNTIL WE’RE CLOSED!The Labor Day weekend is almost here. Take advantage of our Friday and Saturday hours to...
09/03/2026

🚨 DON’T WAIT UNTIL WE’RE CLOSED!

The Labor Day weekend is almost here. Take advantage of our Friday and Saturday hours to stock up on the equipment, parts and supplies you need to keep your jobs moving.

Check your truck. Check your upcoming jobs. Then stop in before the holiday weekend!

đź“… See our complete Labor Day schedule below.

Plan ahead. Stock up. Avoid the afterhours fee.

Two speeds, one motor. The Genteq Evergreen OM covers 825 and 1075 RPM calls in one shot. Why stock two motors when one ...
08/21/2026

Two speeds, one motor. The Genteq Evergreen OM covers 825 and 1075 RPM calls in one shot. Why stock two motors when one covers both, costs less, and upgrades you to an ECM? Its shorter body fits more places, too. Stop by in-store to learn more about the Evergreen OM today.

08/21/2026
What a great Counter Day in Pleasantville! 🔧A huge thank you to everyone who stopped by yesterday's RectorSeal Counter D...
08/06/2026

What a great Counter Day in Pleasantville! 🔧

A huge thank you to everyone who stopped by yesterday's RectorSeal Counter Day. It was a great morning of product demonstrations, helpful conversations, and connecting with the contractors we proudly serve every day.

A special thank you to John McErlane and the RectorSeal for sharing your expertise and helping our customers discover trusted solutions for the job.

And, of course, a big shout-out to our Pleasantville Counter Sales Team, who absolutely knock it out of the park every single time. Your dedication, product knowledge, and commitment to delivering outstanding customer service are what make these events so successful.

Thank you to everyone who joined us—we look forward to seeing you at our next Counter Day!

Address

10 Commons Boulevard
New Castle, DE
19720

Opening Hours

Monday 7am - 4:30pm
Tuesday 7am - 4:30pm
Wednesday 7am - 4:30pm
Thursday 7am - 4:30pm
Friday 7am - 4:30pm
Saturday 8am - 12pm

Telephone

+13023239600

Website

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