With cold weather upon us and forecast arctic blasts, you may need to consider the potential risk to water systems and actions to prevent damage and the resulting repair costs.

The design winter temperature for Nashville is 19.4°F. During arctic blasts we can experience temperatures as low as 0°F with the high temperature of the day still well below freezing. Since your facilities are not typically designed for this weather, you may need to take positive actions to prevent damage to your facility.

Systems that need attention

Any water system is vulnerable to damage from freezing temperatures. This includes the following at a minimum; your facility may have additional specialized systems that require attention:

  • Chilled water systems
  • Chillers, piping and coils
  • Condenser water systems
  • Chillers, cooling towers and piping
  • Hot water systems
  • Piping and idle boilers
  • Fire suppression systems
  • Dry and Wet pipe
  • Domestic water systems
  • Backflow preventer houses

What should you do when the “Arctic Blast” is on the way?

By now you have already completed your plan for winter operation of your facility; you check the facility daily for open doors windows and other sources of infiltration. You are maintaining your HVAC system and repairing heat related failures as they happen. You know that when the temperature reaches extreme you need to do more to protect your building?

  • Disable night setback for the duration of the Blast
    • If your system provides OA you may want to raise the unoccupied temperature instead of going occupied 24/7 to prevent OA introduction during normally unoccupied periods
  • Check economizer dampers close tightly
  • Consider increasing the set point for the perimeter of the building
  • Ensure unit heaters for mechanical rooms are on 
  • Check chilled water pumps are on by automatic control or override on to circulate water
  • Ensure stairway and vestibule heat are operational
  • Verify heat trace operation on piping and pumps, especially pump/chiller combinations
  • Pay careful attention to mechanical rooms with free combustion air louvers, but NEVER block the air path


Nashville Machine Company is committed to provide all of our customers with value through a quality HVAC Service Department. Our HVAC solutions are performed with a level of service and dedication that is second to none.

The service division currently has 25 technicians, trained and certified under EPA regulations. The key to coordinating a quality driven service program is the quality of the personnel in the group. Our group has been carefully selected and each member is a leader in his field. Every member of the group has been selected for their commitment to do whatever is necessary to satisfy the customer. Nashville Machine Company Service is dedicated to fulfilling our customers’ needs in the following areas:

  • Planned Maintenance Agreements
  • Energy Services
  • Air Conditioning
  • Heating
  • Ventilation
  • Refrigeration
  • Plumbing
  • Process Piping
  • Sheet Metal
  • Design/Build
  • Controls

We are all committed to providing our customers with quality-driven solutions. The standards of excellence set by Nashville Machine Company cannot be compared to any other. By working with Nashville Machine Company Service backed by Nashville Machine Company construction, our customers benefit from the knowledge and experience started in 1887 and still enjoys the personal attention and caring of a family owned company.

For more information Contact
Nashville Machine Company

Jennifer Cox ( Service Department  Account Manager)  (615) 566-9110 jcox@nashvillemachine.com