HVAC/WH Equipment | STUDY GUIDE
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Terms in this set (43)
Air-Source Heat Pump (ASHP) An electric HVAC system that transfers heat
between indoor and outdoor air to provide both
heating and cooling. It uses a refrigeration cycle
that can be reversed, making it 2-4x more efficient
than electric resistance heating in moderate
climates.
Air-to-Water Heat Pump
Water-to-Water Heat Pump A heat pump that uses a water loop (typically a
building-wide loop or body of water) as its heat
exchange medium. Common in commercial
buildings where multiple units share a common
condenser water loop with a boiler and cooling
tower.
Ground-Source Heat Pump (GSHP) A heat pump that exchanges heat with the ground
via buried loops of pipe (closed-loop) or
groundwater (open-loop). Also called geothermal,
it offers higher efficiency than ASHPs because
ground temperatures are more stable year-round.
, Variable Refrigerant Flow (VRF) A multi-zone heat pump system that uses
system refrigerant as the heating/cooling medium and
modulates flow to multiple indoor units from a
single outdoor condenser. Common in commercial
buildings; called VRV by Daikin (the originator).
Heat recovery VRF A VRF system capable of simultaneous heating and
cooling in different zones, transferring rejected heat
from cooling zones to heating zones. More
expensive than heat pump VRF but ideal for
buildings with diverse loads.
Mini Split Heat Pump A ductless heat pump with one outdoor unit serving
one indoor unit (1:1). Refrigerant lines run through a
small wall penetration, eliminating ductwork losses
and enabling zone-by-zone control.
Muti Split Heat Pump A ductless system where one outdoor unit serves
multiple (typically 2-8) indoor units. Each indoor
head can be controlled independently for zoned
comfort.
Ducted mini-split A mini-split system using a compact air handler with
short duct runs to serve multiple rooms from one
indoor unit. Combines ductless efficiency with the
discreet appearance of central systems.
Cold Climate Heat Pumps An air-source heat pump engineered to maintain
high heating capacity and efficiency at low outdoor
temperatures, often down to -15°F or below. Uses
enhanced vapor injection, variable-speed
compressors, and optimized refrigerants.
Save
Terms in this set (43)
Air-Source Heat Pump (ASHP) An electric HVAC system that transfers heat
between indoor and outdoor air to provide both
heating and cooling. It uses a refrigeration cycle
that can be reversed, making it 2-4x more efficient
than electric resistance heating in moderate
climates.
Air-to-Water Heat Pump
Water-to-Water Heat Pump A heat pump that uses a water loop (typically a
building-wide loop or body of water) as its heat
exchange medium. Common in commercial
buildings where multiple units share a common
condenser water loop with a boiler and cooling
tower.
Ground-Source Heat Pump (GSHP) A heat pump that exchanges heat with the ground
via buried loops of pipe (closed-loop) or
groundwater (open-loop). Also called geothermal,
it offers higher efficiency than ASHPs because
ground temperatures are more stable year-round.
, Variable Refrigerant Flow (VRF) A multi-zone heat pump system that uses
system refrigerant as the heating/cooling medium and
modulates flow to multiple indoor units from a
single outdoor condenser. Common in commercial
buildings; called VRV by Daikin (the originator).
Heat recovery VRF A VRF system capable of simultaneous heating and
cooling in different zones, transferring rejected heat
from cooling zones to heating zones. More
expensive than heat pump VRF but ideal for
buildings with diverse loads.
Mini Split Heat Pump A ductless heat pump with one outdoor unit serving
one indoor unit (1:1). Refrigerant lines run through a
small wall penetration, eliminating ductwork losses
and enabling zone-by-zone control.
Muti Split Heat Pump A ductless system where one outdoor unit serves
multiple (typically 2-8) indoor units. Each indoor
head can be controlled independently for zoned
comfort.
Ducted mini-split A mini-split system using a compact air handler with
short duct runs to serve multiple rooms from one
indoor unit. Combines ductless efficiency with the
discreet appearance of central systems.
Cold Climate Heat Pumps An air-source heat pump engineered to maintain
high heating capacity and efficiency at low outdoor
temperatures, often down to -15°F or below. Uses
enhanced vapor injection, variable-speed
compressors, and optimized refrigerants.
