Upgrade to a System That Keeps Up With Your Home

When your water heater reaches the end of its life — or can no longer keep up with your home’s needs — a clean, properly installed replacement makes all the difference. At Dave’s, we help you choose the right system and install it with precision so you get dependable hot water for years to come.

When Replacement Becomes the Right Move

Water heaters work quietly in the background, but once they start to fail, the signs become hard to ignore: not enough hot water, uneven temperatures, leaks, or constant repairs. Sometimes these issues can be fixed — and sometimes replacing the unit is simply the safer, more cost-effective option.

A new water heater can help:

Restore consistent hot water
Improve energy efficiency
Reduce the risk of leaks or tank corrosion
Lower long-term repair costs
Increase capacity for busy households

If your current system is struggling, we’ll help you determine whether replacement is the smart next step.

Choosing the Right System for Your Home

A good replacement starts with the right match. Size, fuel type, layout, demand, and budget all play a role — and our team walks you through every option so you understand what fits best.

We help you choose between:

Traditional tank water heaters
High-efficiency tank models
Tankless water heaters (gas or electric)
Different capacity options for large or growing households

You’ll understand how each system works, what it costs to operate, and how it fits your home before you make a decision.

What to Expect During Your Replacement

Replacing a water heater shouldn’t feel overwhelming. Our team handles the details so the process is smooth from start to finish — with clear communication along the way.

Here’s how it typically goes:

Assessment & Conversation
We listen, evaluate your home’s hot water needs, and identify the best-fit options.
Upfront Pricing
You get a clear estimate with no hidden fees or surprise add-ons.
Clean, Careful Removal
We safely remove your old system and prep the area for the new unit.
Professional Installation
Our technicians install the new water heater to manufacturer standards and local codes — with clean, precise workmanship.
System Testing & Walkthrough
We verify performance, check safety features, and show you how everything works.

You’re left with a system that’s reliable, efficient, and built to last.

Traditional vs. Tankless: Understanding the Difference

Choosing between tank and tankless comes down to how your home uses hot water. We make the comparison easy:

Traditional Tank Water Heaters

Great for steady, predictable usage
Lower upfront cost
Available in multiple sizes
Ideal for single-family homes with standard demand

Tankless Water Heaters

Endless hot water
Higher efficiency and lower long-term operating cost
Space-saving design
Excellent for families with varied or high demand

We’ll help you compare operating costs, performance, and long-term value so you choose with confidence.

Why Homeowners Trust Dave’s for Installation

Your water heater is a major appliance — and installation quality matters just as much as the equipment itself. At Dave’s, we take pride in work that’s clean, compliant, and done correctly the first time.

Homeowners choose us for:

Clear, honest guidance
Respect for your home and time
Clean craftsmanship and attention to detail
Accurate sizing and proper installation standards
Work backed by a written guarantee

We don’t cut corners, and we don’t rush. We install every system as if it were going into our own home.

Why Homeowners Choose Dave’s

Experience You Can Feel

We’ve served Northern Virginia homes for 50 years.

Fair, Upfront Pricing

No upsells, no hidden fees — just straight answers.

Local & Reliable

Based right here in Sterling, ready when you need us.

Respectful Service

We treat every home like it’s our own.

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Dependable Hot Water to Keep Your Home Comfortable

Dedicated to Your Comfort Since 1975

At Dave’s Heating & Air, we know how important reliable hot water is to your home. Whether we’re repairing your current system or installing a new one, our team takes the same careful, honest approach we’re known for.

We explain what we find, walk you through your options, and outline the cost before any work begins — no surprises and no pressure.

Our technicians take the time to do the job the right way, from clean, precise installations to thorough safety checks on every visit. And because we stand behind our workmanship, your water heater service comes with a written guarantee.

When you choose Dave’s, you get dependable hot water and a team that treats your home with respect every step of the way.

Call 571.346.3940 and let’s keep your home comfortable!

Hear It from Our Happy Customers

Nothing makes us prouder than hearing directly from the wonderful people we serve right here in Sterling, Herndon, Reston and Northern Virginia. Our reputation is built on knowledgeable technicians, courteous service, and the promise that we always leave your home as clean as we found it—if not cleaner!

Customers regularly praise our team for arriving on time, delivering expert system installations and repairs, and ensuring the whole process is seamless from start to finish. Whether it’s a complete HVAC replacement or routine maintenance, folks appreciate the extra care and attention to detail we bring. Many even say they’d recommend us to friends and neighbors without hesitation. Now that’s high praise!

      EXCELLENT  
   Based on 146 reviews 
    
 
 
 
   
 
 
       Posted on Google  
   
   Sarah Stein 
 
 
 
 Trustindex verifies that the original source of the review is Google. We just had Dave’s come out to our house today.  We thought we might have a serious issue with our heating and air system.  The two technicians cleaned and serviced the unit and let us know that our unit was fine.  We went from thinking we had an expensive problem to only having to pay a very reasonable service fee.  They were professional and wonderful to work with.  We will be using the company in the future and will recommend them to others.
  
 
      Posted on Google  
   
   Eric Moy 
 
 
 
 Trustindex verifies that the original source of the review is Google. I scheduled online for an AC diagnostic which was seamless. Adam came out in that time frame and gave me the run down of the issues. He was very knowledgeable and I would've went with him to fix the compressor issues.

Unfortunately, whoever this companies receptionist is sounds like she hates her life over the phone. It took them a week to get back to me with a quote. She calls me, asks if I want to get it fixed and immediately asks for my credit card info. I don't have an estimate of what's being repairs or materials they need. I tell her please send it over and I'll pay the down payment through the portal since I was driving to work. A day goes by and crickets, I get another call asking about payment. She says she sent the email but the only thing I received was a schedule confirmation. Finally it arrives and everything is still lumped into one price. It wasn't that big of a deal, but I decided to get a second quote and this other place turned an itemize quote around in an hour, came out the next day, didn't ask for a deposit, and got the job done.

If you all get that much business, the sentiment is your customers are just a number, and you can't be bothered to give the bare minimum customer experience then so be it.
  
 
      Posted on Google  
   
   Jan and Joe Adams 
 
 
 
 Trustindex verifies that the original source of the review is Google. Great job. Dave’s assisted with design as this was a replacement of a chiller system. Very pleased. Adam and team doing the installation we awesome.
  
 
      Posted on Google  
   
   David Loughran 
 
 
 
 Trustindex verifies that the original source of the review is Google. Good experience from start to finish.  Notification of appointments and arrivals. All members of the team were professional and polite.  This was for a whole house steam humidifier.
  
 
      Posted on Google  
   
   Cheryl Wacker 
 
 
 
 Trustindex verifies that the original source of the review is Google. I needed a new AC system due to RELAC out of business.  Todd was my first contact.  He explained my options, answered all my questions...even after he left and I continued to contact him.  He was very patient with all my concerns.  On the install day, Adam and his team arrived on time, and communicated with me during the entire process.  They explained thoroughly what they were doing and why.  They did not leave until all had been checked out, and they cleaned up thoroughly.  I will recommend them to anyone needing a new AC system.
  
 
      Posted on Google  
   
   nora b 
 
 
 
 Trustindex verifies that the original source of the review is Google. I’ve been a Dave’s customer for over 20 years. Great people, great service.
  
 
      Posted on Google  
   
   Stuart Logan 
 
 
 
 Trustindex verifies that the original source of the review is Google. Exceptional service. Furnace delivered and installed professionally.  Very nice to work with family-owned business that understands customer care!
  
 
      Posted on Google  
   
   Norm Melnick 
 
 
 
 Trustindex verifies that the original source of the review is Google. The two techs (Adam and Stan) did an outstanding job. They were on time, professional, and thorough in analyzing the issue and then remedying the situation.
  
 
      Posted on Google  
   
   Robert Becker 
 
 
 
 Trustindex verifies that the original source of the review is Google. I have been using Dave’s heating and air conditioning for many years. Their service has been impeccable. They always arrive on time and the quality of their workmanship is first class!