Frequently Asked Questions (F.A.Q.)

  1. What are your main phone numbers?
  2. What is your address?
  3. What areas do you serve?
  4. What are your hours of operation?
  5. Do you offer service on weekends?
  6. What forms of payment do you accept?
  7. Do you offer financing?
  8. Which holidays are you closed?
  9. Do you have emergency service after hours?
  10. How much will it cost to fix my broken heating/AC system?
  11. How much does it cost to have a plumbing repair?
  12. What's included in the ESA contract?
  13. Can you provide proof of maintenance for my condo owner's association?
  14. If my system breaks down, should I repair it or replace it?
  15. How often should I change my air filter?

1. What are your main phone numbers?

We have many phone numbers that we use to serve our customers. 

Our main numbers include:
Northern Virginia: 703-644-6400
DC:  202-559-6212
Toll-free:  888-644-4588
Fax:   703-550-0998

2. What is your address?
Our main office is:
7208 Lockport Place
Lorton, Virginia 22079

Our mailing address is:
P.O. Box 516
Newington, Virginia 22122

3. What areas do you serve?
We service both residential and commercial customers throughout most of Northern Virginia including all of Fairfax County, and some of Prince William and Loudon Counties.Our service area is expanding into metropolitan Maryland and DC.  We are licensed to work in DC, Virginia, and Maryland.

4. What are your hours of operation?
Our office is open weekdays from 7 a.m. until 5 p.m.

5. Do you schedule installation or maintenance work on weekends?
We only offer emergency service after hours and on weekends, and the after-hours, emergency service rates are higher. If you have an emergency after hours, call 703-644-6400 and ask the service to page the "on-call” technician.

6. What forms of payment do you accept?
We accept cash, checks, Visa, Master Card, and Discover.  We do not have a billing department and all residential work is performed on a COD basis.

7. Do you offer financing?
We offer financing through a third party for new equipment installation work.  Rates and terms vary, so please call or email the installation department for details on our current offer.

8. Which holidays are you closed?
We are closed the following holidays: New Year's Day, Memorial Day, 4th of July holiday, Labor Day, Thanksgiving Day, and Christmas Day.  If Christmas or New Year's falls on a weekend, the federal holiday will be observed.

9. Do you have emergency service after hours?
After normal business hours, on weekends and holidays, our phones are answered by an answering service. We have technicians and plumbers "on call” after hours. Should an emergency arise after normal business hours, you can call the regular phone number (703-644-6400) and ask the answering service to page the on-call technician or plumber for emergency service.  The technician or plumber on call will return your call within an hour.  After normal business hours, the residential diagnostic charge and the fees are higher. Call 703-644-6400 or email our service department for more information or to schedule an appointment.

10. If my heating or air conditioning system breaks down, how much will it cost to fix it? 
For most residential heating and air conditioning service calls we charge $98* to come and do a system diagnosis.  We use up-front pricing--where each repair is priced specifically in our price book.  After the diagnosis, the technician will quote the repair price for your authorization before the work is performed. We do not charge on a time-and-materials basis, so you will know exactly what you will pay, even if it takes longer than expected to fix the problem. *After normal business hours, the fees are higher, and the residential diagnostic charge is $168. 

11. How much does it cost to have a plumbing repair? 
For plumbing service calls, including repairs on water heaters, we charge $59* to come out and do a complete diagnosis.  (Commercial plumbing is $79.) We use flat-rate pricing where each job is priced specifically in our price book.  After the diagnosis, the plumber will quote the repair price for your authorization before any work is performed.  We do not charge on a time-and-materials basis, so you will know exactly what you will pay, even if it takes longer than expected to fix the problem.  *After normal business hours, the fees are higher, and the diagnostic charge is $139 ($159 for commercial). Call 703-644-6400 or email our service department for more information or to schedule an appointment.

12. What's included in the ESA contract? 
Regular maintenance and service on mechanical equipment prolongs its life and helps keep it running at peak efficiency.  While inspections do not guarantee that your system will operate trouble-free, potential problems can be spotted before they result in a breakdown. Our ESA consists of two thorough seasonal inspections of the heating and air conditioning system using the "Certificate of Inspection,"checking the electrical components of the system and performing carbon monoxide testing (on gas or oil furnaces).  Our ESA customers receive priority dispatching for 24-hour emergency service and a 15% discount on any repairs that might be needed throughout the year.  Any service with Trademasters Service comes with our Satisfaction Guarantee. Call 703-644-6400 or email our service department for more information or to schedule an appointment.

13. My condominium unit owners' association requires proof that I had maintenance. Can you give me that?
We can perform a thorough inspection that will satisfy the requirements of your condominium unit owners' association, such as the Gates of McLean or Cardinal Forest.  We can use our "Certificate of Inspection” checklist or we can use one provided by your condominium.  A single inspection is $98; however, we offer specials in some neighborhoods, so call to see if your neighborhood qualifies for a discount. Call 703-644-6400 or email our service department for more information or to schedule an appointment.

14. If my system breaks down, should I repair it or replace it?
Deciding to replace a major component on an older system can be a gamble because there is no guarantee that something else won't break next week. The risk is even greater when you're facing a costly repair to system that is over eight years old, one that is in poor condition, or one that has not had regular maintenance service.  Be sure to consider factors such as the age of the system, how long you plan to stay in the home, your current level of comfort, and the potential savings in energy costs.  If you determine that your appliance is near or at the end of its useful life, you may decide to invest the repair cost towards a new system. For newer systems that have received regular maintenance, repair might be the better choice.  Work with one of our technicians or comfort and installation consultants, and he will be happy to give you the technical information you need to help you make a well-informed decision.  Call 703-644-6400 or email our comfort and installation department for more information or to schedule an appointment.

15. How often do I change the filter?
Keeping your filters clean is one of the most important and inexpensive ways homeowners can both increase the performance and help prolong the life of their comfort systems.  Dirty air filters can reduce the amount of airflow through your system, making your system work harder.  Homeowners should avoid running their comfort systems without filters.  Filters improve indoor air quality, while preventing the accumulation of dust and dirt on the working parts of your furnace or air handler.  Accumulated dirt can drastically reduce your system's efficiency and performance, and it is frequently the cause of system breakdowns.

You should change your filters whenever they are dirty.  For an easy rule of thumb, the Department of Energy recommends replacing regular air filters in your furnace every month.

If your system has an electronic air cleaner or media filters, consult the manufacturers' recommendations on replacement.  Some air cleaners have washable filters, and others require changing only once or twice a year.  If you are unsure about what type of filtering system your comfort system has, just ask your service technician or call or email our service department for more information.