Virginia & Maryland Heating, Air Conditioning & Plumbing

A Note From Donmar Company about exciting tax credits and rebates!

Information updated 12/30/2022

The Inflation Reduction Act of 2022 provides federal tax credits and deductions that empower Americans to make homes and buildings more energy-efficient to help reduce energy costs while reducing demand as we transition to cleaner energy sources.

Savings for Homeowners

New federal income tax credits are available through 2032 providing up to $3,200 annually to lower the cost of energy efficient home upgrades by up to 30 percent. Improvements such as installing heat pumps, heat pump water heaters, insulation, doors and windows, as well as electrical panel upgrades, home energy audits and more, are covered by the tax credits and can help families save money on their monthly energy bills for years to come.

In addition to the energy efficiency credits, homeowners can also take advantage of the modified and extended Residential Clean Energy credit, which provides a 30 percent income tax credit for clean energy equipment, such as rooftop solar, wind energy, geothermal heat pumps and battery storage through 2032, stepping down to 22 percent for 2033 and 2034.

ALSO, Washington Gas is currently offering $300-400 rebates for new gas furnaces with an AFUE of 92% or greater along with any CARRIER incentives that might be available.

Schedule an estimate today! We’ll be happy to go over any and all available incentives depending on your project.

Here’s to a safe, healthy and prosperous New Year 2023!


Donald Wills


Donmar Heating, Cooling, and Plumbing

Text us some photos of your HVAC or Plumbing project we’ll send you an estimate! CONTACT US NOW

Sterling HVAC & Plumbing Services

Serving Homeowners Throughout Northern Virginia & Maryland Since 1990

At Donmar Company Heating & Cooling, we have always been committed to giving our customers the best heating, cooling & plumbing service, always tailoring our approach based on your home, your budget, and your needs. Our Sterling HVAC technicians and plumbing experts combine excellent workmanship with a steadfast devotion to total customer satisfaction to create consistently exceptional results. That’s what we call the Donmar Company difference!

When it comes to your home, we strive to help create a controlled climate year-round. We only carry the industry’s best technologies and our NATE Certified technicians are fully trained in the most cutting-edge installation practices. We’ve created a 30-year legacy of customer service and satisfaction, always providing the top-notch service you have come to expect from our team.

Contact us today for any of your Sterling HVAC or Plumbing needs!

You Know Exactly Who is on Their Way & When!

In order to provide you with peace of mind, we utilize technology that allows our customers to see who's coming and their exact ETA, all with GPS tracking! When you set up a service call, you'll receive a notification of which technician will be helping you (including a photo of them). There's never any guesswork and you won't be left in the dark on which technician will be arriving to your home and when, because it is all displayed to you in real time.

Creating Happy Customers Since 1990

Top Rated HVAC & Plumbing Company in Northern Virginia

Finding an HVAC and plumbing company you can trust can be pretty difficult. That is why Donmar Heating, Cooling & Plumbing is committed to offering prompt, affordable service on your schedule.

We proudly offer a range of flat-rate fees and financing options with approved credit. Our services are second to none.

We proudly feature energy efficient HVAC systems and water heaters that are friendly on the environment, as well as your monthly energy bills.

Our plumbers and technicians have years of experience and can determine a solution based on your needs, your home’s specifications, and most importantly, your budget.

We know that you want a comfortable home all year long, so we make sure every repair or installation is executed to your complete satisfaction.

It's more than just about comfort –
it’s about having peace of mind.

Contact us today for Sterling heating and cooling services.

  • Emergency Services 7 Days a Week
  • NATE Certified Technicians
  • Offering Free Estimates On HVAC Replacements
  • Flexible Financing Options with approved credit
  • Quality Service With Honest Values
  • Affordable Service Management Agreements
  • Over 30 Years of Experience
  • We Are On Time, Every Time

Our Commitment to Excellence

  • President's Award 2021
  • Best Plumbers in Rockville
  • ACAA Member
  • Carrier
  • CFAD

Don't Just Take Our Word For It!

  • “This company is very attentive to the customer and respond to their concerns quickly.”

    Natalie M.

  • “We've been pleased with the units, but its your employees that have made the real impression - they've been uniformly fantastic!”


  • “Great company — replaced my furnace very efficiently and effectively. ”

    Chris C.

  • “Your customer service is outstanding and everyone that I spoke to or met in person speaks to the nature of your company.”


  • “I am thankful for Paul’s service and HIGHLY RECOMMEND Donmar Company to anyone with an HVAC issue!”


  • “They are honest and straightforward with their recommendations and always give us various options. ”

    Samia K.

  • “It is so hard to find a trustworthy AC repair company and I think i have finally found it.”


  • “Donmar Company defines customer service excellence to a higher level.”

    Scott H.

  • “Really appreciate your crew. They answered all my questions and concerns, and the work appears to be impeccable!”

    Jeffrey N.

Request a Service Today!

We're Prepared to Handle Any Issue
    • Please enter your name.
    • This isn't a valid phone number.
    • Please enter your email address.
      This isn't a valid email address.
    • Please make a selection.
    • Please enter a message.