Your Comfort Is Our Priority – Reliable Heating & Cooling Services You Can Trust!

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(571) 626-5403

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why choose us?

your comfort is our biggest priority

We’ve been doing this since 1975, so we know a thing or two about keeping you happy & your home running as it should.

Fully Licensed & Insured

NATE Certified Technicians

50 Years in Business

Same Day Service

Annual Service Plans

Financing Available

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exclusive offer

Save big on service

Three photos: two workers walk toward company vans, a dog in a toy car with a company logo, and a technician adjusting a thermostat on a wall.

hVAC maintenance plan

see the value of working with us

With expert maintenance provided by John Nugent & Sons you can be sure you're getting the maximum benefit from your HVAC system.

Two maintenance calls Per year

Priority Emergency Service

10% discount on repairs

Reduced Diagnostic Charge

Accessory Coverage

And MORE!

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contact us

help is a click away

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Dark red circular logo with the white letters JNS above five white utility icons representing water, drainage, fire, climate control, and electrical services.

service area

northern Virginia can count on John Nugent & Sons

  • Alexandria
  • Annandale
  • Arlington
  • Ashburn
  • Centreville
  • Chantilly
  • Fairfax
  • Falls Church
  • Great Falls
  • Herndon
  • Leesburg
  • McLean
  • Oakton
  • Purcellville
  • Reston
  • Sterling
  • Vienna
  • Alexandria
  • Annandale
  • Arlington
  • Ashburn
  • Centreville
  • Chantilly
  • Fairfax
  • Falls Church
  • Great Falls
  • Herndon
  • Leesburg
  • McLean
  • Oakton
  • Purcellville
  • Reston
  • Sterling
  • Vienna
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A map of the Washington, D.C. area shows several marked locations, with a large logo near Reston and other markers across surrounding towns and cities.

Customer testimonials

Great service no matter the season

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financing options

Flexible financing available with approved credit

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awards & affiliations

award-winning service & industry-leading brands

2024 Best of Loudoun Winner badge featuring red and black text.
A black circular badge with the text The Best of Ashburn 24 in white and green letters.
Honeywell Generators logo with Honeywell in red and Generators in gray text separated by a vertical line on a white background.
Blue ACCA logo featuring stylized wave-like lines above the acronym ACCA in bold blue letters on a white background.
Washington Gas logo featuring a blue flame icon enclosed in a circle alongside text reading Washington Gas A WGL Company.
PHCC logo with icons for plumbing, heating, and cooling above the text "Plumbing-Heating-Cooling Contractors Association" on a gray background.
A teal and black badge recognizing the 2026 Northern Virginia Magazine Best Home Experts.
Rheem brand logo featuring white typography inside a red oval.
Logo featuring a red geometric design on the left, the word ELITE above Sotheby's International Realty, and smaller text reading Portfolio Luxury Living & Fine Homes.
Red Lennox logo featuring bold, italicized letters enclosed in a stylized curved shape.
2024 Best of Loudoun Winner badge featuring red and black text.
A black circular badge with the text The Best of Ashburn 24 in white and green letters.
Honeywell Generators logo with Honeywell in red and Generators in gray text separated by a vertical line on a white background.
Blue ACCA logo featuring stylized wave-like lines above the acronym ACCA in bold blue letters on a white background.
Washington Gas logo featuring a blue flame icon enclosed in a circle alongside text reading Washington Gas A WGL Company.
PHCC logo with icons for plumbing, heating, and cooling above the text "Plumbing-Heating-Cooling Contractors Association" on a gray background.
A teal and black badge recognizing the 2026 Northern Virginia Magazine Best Home Experts.
Red Lennox logo featuring bold, italicized letters enclosed in a stylized curved shape.
Logo featuring a red geometric design on the left, the word ELITE above Sotheby's International Realty, and smaller text reading Portfolio Luxury Living & Fine Homes.
Rheem brand logo featuring white typography inside a red oval.
Americans with Disabilities Act (ADA) Notice

At John Nugent & Sons, we are committed to ensuring that individuals with disabilities enjoy full access to our websites. In recognition of this commitment, we are in the process of making modifications to increase the accessibility and usability of this website, using the relevant portions of the Web Content Accessibility Guidelines 2.0 (WCAG 2.0) as our standard. Please be aware that our efforts are ongoing. If at any time you have difficulty using this website or with a particular web page or function on this site, please contact us by phone at (571) 626-5403; or email us at ([email protected]) and place “Web Content Accessibility (ADA)” in the subject heading and we will make all reasonable efforts to assist you.

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