"Where the BC home building industry finds and shares information"

  • Education & Training
  • Industry Information
  • Industry Sectors
  • Information Sources
Search This Site For
Custom Search

Basics & Theory

HPAC Magazine: Overview Of Electric Motors
Heating Plumbing & Air Conditioning magazine provides a basic overview of the common motors used in the HVAC/R industry.

HVAC School: Motor Types
HVAC School says in residential and light commercial HVAC we work primarily with PSC (Permanent split capacitor) motors. However, there are some other types that are good to be aware of.

US DOE: ECM Air Handler Fans Save Energy
US Department of Energy describes how an HVAC system with a central air handler fan can realize significant energy savings by using a fan with an electronically commutated (ECM) motor.
Issues & Performance

Building Science: ECM Efficiency May Be Better Or Worse
Building Science says electrically commutated motors (ECM) in air-handler fans promise improved efficiency, but describes how improved technology may not necessarily mean efficient HVAC systems.

CMHC: Effects Of Programmable Fan Controllers On Air Distribution & Energy Use
CMHC research project assessed a low-cost, commercially available programmable fan controller in combination with conventional PSC (permanent split capacitor) fan motors as a means of reducing motor energy use in existing furnaces. Results indicate that, compared to continuous circulation, intermittent modes continue to supply some air circulation while saving energy. (PDF)

HVAC School: Does a Motor Draw More or Less at lower Voltage?
HVAC school says a blower motor rated for 120V draws about twice the amperage of the same horsepower motor rated at 240V. This is different than what happens when you drop the voltage of a motor below its rating.

NEMA: Premium Motors Standards
National Electrical Manufacturers Association provides information on the NEMA Premium Motors program.

US DOE: Comparison of ECM & PSC Blower Motor Amp Draw
US Department of Energy online video compares electrically commutated (ECM) and permanent split capacitor (PSC) motors.

ACHR News: Retrofitting PSC Motors with ECMs
ACHR News describes how replacing PSC motors with ECMs can boost bottom line and improve customer comfort.

US DOE: Evaluation of Retrofit Variable-Speed Furnace Fan Motors
US Department of Energy report Evaluation of Retrofit Variable-Speed Furnace Fan Motors evaluated brushless, permanent magnet (BPM) replacement motors for residential furnaces. Results indicate that BPM replacement motors will be most cost effective in homes with right-sized HVAC equipment and proper ductwork. Additionally, more dramatic savings can be realized if the occupants use fan-only operation to circulate air when there is no thermal load. (PDF)
Product Supply

CMHC: Study On ECPM Furnace Motors Effect On Electricity & Gas Use
The Canadian Centre for Housing Technology study evaluates the performance of high efficiency electric motors to determine their impact on electricity and gas consumption. The results indicate that this technology offers significant benefits in houses where the furnace fan is operated continuously during both the heating and cooling seasons. (PDF)

HVAC School: Aftermarket Motor Selection & Considerations
HVAC School says when looking at replacing a single phase A/C motor with an aftermarket motor, there's a few things you should know and pay attention to.

US DOE: Replacement Of Variable-Speed Motors For Furnaces
US Department of Energy study Replacement of Variable-Speed Motors for Furnaces Based recommends BPM motor upgrades only in special circumstances in cold climate homes where: occupants use the furnace fan often for ventilation or filtration; there is a large cooling load; where the furnace or air conditioner, or both, are right-sized and run nearly 2,000 hours per year. (PDF)
Quick Links
» Submit A Link
» Comments & Questions
» Have Some Fun/Timewasters

    Subscribe to BCBI RSS Feed    RSS Feed
BCBI On Twitter

  Search The Internet
Custom Search


“Where the BC home building industry finds and shares information”

Home I About I Directory I Newsletter I Community I Contact Us I Privacy Policy I Terms Of Use

BC Building Info © 2020        Delta, British Columbia, Canada        Telephone: 604-943-9299
chbabc-logo        chba-logo        gvhba-logo