Economizers

An air side economizer is an integral part of an HVAC system. Economizers can provide significant energy savings when installed correctly. Cambridgeport uses the most advanced economizer controls while maintaning ease of installation and years of reliability.

Current economizer offerings:

Carrier

Bryant

York

JCI

Ultra Low Leak

New ASHRAE and IECC requirements are now calling for air side economizers to be ultra low leak in accordance with AMCA Standard 500-D. The requirements are as follows:

Motorized Dampers:
Must have a leakage rate of less than 4 CFM / FT2 at 1″ of static pressure.

Non Motorized Dampers:
Must have a leakage rate of less than 20 CFM / FT2 at 1″ of static pressure.

Cambridgeport has met and exceeded these requirements on our supply, return and barometric relief dampers. Our economizers have been approved by a 3rd party testing facility in accordance with AMCA 500-D to meet all current ASHRAE and IECC codes. All dampers are labeled by an approved testing facility per IECC 2015.

Check your state’s current code requirements before your next economizer install.

Enthalpy

Enthalpy is the total heat content of a substance and is extremely important for most areas of the U.S. The use of an enthalpy sensor in the outside air will measure not only temperature but also humidity. The use of this sensor will reduce latent heat from entering the building and in turn provide energy savings as it takes more energy to remove latent heat than it does sensible heat. In addition to energy savings the use of enthalpy sensors will ensure the space is not just at the correct temperature but that it remains comfortable for all those that occupy it.

Cambridgeport economizers come standard with an enthalpy sensor in the outside air-stream.

Do I need an economizer at all?

Economizers have been required on air handlers over 4.5 tons as far back as ASHRAE 90.1-2010 in all climate zones other than the southern tip of Florida. As codes continue to get more stringent economizers are more of a necessity than ever. Not only is it a code requirement but it provides significant energy savings as well as required ventilation to maintain healthy environments indoors.

Failt Detection and Diagnostics

ASHRAE and IECC call out many FDD requirements for economizers. Some of these requirements include:

  • Temperature sensore failure faults
  • Not economizing fault
  • Damper not modulating fault

Cambridgeport only includes controls that meet this criteria. Don’t let other manufacturers pass off antiquated controls as code compliant. Use Cambridgeport economizers and get a high quality economizer every time!

Cambridgeport also provides economizer tech support 24/7 at (781) 520-2286.