Duct & HVAC Services (571) 351-7391

Fairfax County

Heating & Cooling in Annandale, VA

Mid-century ramblers, split-levels and colonials on wooded lots, with plenty of additions and finished basements along the way.

Annandale is largely 1950s through 1970s single-family housing, much of it renovated in stages. Ducts that were fine for the original floor plan get stretched to new rooms and finished basements, and airflow suffers.

Lincolnia, just outside the Alexandria city line, has the same story: aging systems, layouts changed by years of updates, and inconsistent temperatures from room to room.

Common jobs in Annandale

  • Furnace and AC replacements in 1960s homes
  • Duct redesign after additions
  • Duct cleaning and sealing
  • Air purifiers and upgraded filtration
  • Thermostat upgrades

Annandale questions

Asked in Annandale.

We finished our basement and now it’s always cold. Can that be fixed?

Usually. Basements often get a couple of supply runs and no return, so the room never mixes with the rest of the house. We check the supply and return layout and the existing system’s capacity, then recommend duct changes or a dedicated ductless head.

Is duct cleaning worth it in an older Annandale home?

It can be, especially after a renovation, after moving in, or if dust and odors keep returning. We look inside the ducts first and tell you honestly whether cleaning, sealing or repair is what your system needs.

Do you serve Lincolnia and Bailey’s Crossroads?

Yes. Both are close to our home base and part of our regular service area.

All 36 HVAC answers

Nearby

Also close by.

I needed to get my HVAC unit diagnosed at my high-rise condo. Not many HVAC companies took this on so it was nice to have integrity take it on. They came diagnosed it and figured out the best path forward for me and got the job done very promptly. I appreciate their service and customer service.

R. DeanHigh-rise condo diagnosis · Google review

This business and their personnel who I interacted with for my HVAC system replacement really lived up to their company’s name: Integrity. They were Roberto, Isaac, Kristhiam, Oscar and Arnardo— all responsive, knowledgeable and very professional. They go out of their way to provide excellent customer service. Now I have a brand new HVAC system that’s up and running, hopefully for a very long time. Thanks, Integrity!

Marte L.Complete system replacement · Google review

Isaac and his partner were awesome. They came on time. Were polite and courteous. Explained each step.they were taking to.fix the problem. They explained with integrity. They were my second opinion to a large reputable company who said that they couldn't fix my AC and immediately wanted to sell me a whole HVAC system. No sales job with Isaac. Just suggestions without any nudging. Integrity Duct and HVAC Services is my go to company. I tried the other company because Integrity was booked and was hot. In the end, we decided to deal with the heat the old fashioned way, fans, until Integrity came. They were worth the wait.

C. AndersonAC repair, second opinion · Google review

Reviews are quoted word for word as posted on Google, with names as published.

We Repair the Air You Breathe

No heat, no cooling, or just not right?

Call and talk to a family-owned team that diagnoses first and recommends honestly. Most service requests are scheduled within 24 hours.

(571) 351-7391
Call (571) 351-7391