Reference - ASHRAE Baseline Systems

System Number System Name Fan Control Heating Source Cooling Source Sefaira Equivalent Sefaira Notes
1 PTAC CV Fossil Boiler Direct Expansion 'Packaged Terminal Air Conditioner' Heating Hot Water Source will be Gas Fired Boiler by default 
2 PTHP CV Electric Heat Pump Direct Expansion 'Packaged Terminal Heat Pump'  
3 PSZ-AC CV Fossil Furnace Direct Expansion coming soon!  
4 PSZ-HP CV Electric Heat Pump Direct Expansion coming soon!  
5 PVAV w/reheat VAV Fossil Boiler Direct Expansion 'Packaged Rooftop VAV w/ Reheat' Heating Hot Water Source will be Gas Fired Boiler by default 
6 PVAV w/PFP boxes VAV Electric Resistance Direct Expansion 'Packaged Rooftop VAV w/ Reheat'

Water-side >Heating Hot Water Source > Electric Boiler

Air-side > Zone Terminal Unit > Terminal Type > Fan Powered VAV Box 

7 VAV w/reheat VAV Fossil Boiler Chilled Water 'VAV w/ Central Plant'  
8 VAV w/PFP boxes VAV Electric Resistance Chilled Water 'VAV w/ Central Plant'  

Water-side >Heating Hot Water Source > Electric Boiler

Air-side > Zone Terminal Unit > Terminal Type > Fan Powered VAV Box 

9 SZ VAV VAV Fossil Boiler* Chilled Water 'VAV w/Central Plant' match 'proposed design' heat source to that in systems
10 Heating & ventilation CV Electric Resistance n/a 'Heating & Ventilation' Change Heating Hot Water Source to Electric Boiler in Water Side input tab.
11 Heating & ventilation CV Fossil Furnace n/a 'Heating & Ventilation' Heating Hot Water Source will be Gas Fired Boiler by default 
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    Andrew Corney

    Just a note for systems 3 and 4. You can use the CAV system if you project only has one zone for systems 3 and 4. We're working on multi-zone CAV. If your project has lots of zones you'll probably get an over-estimate of your energy if you try CAV compared to the LEED Baseline which expects a single CAV unit per zone.

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    Matthew Hein

    I see that it's been a few months since this was last updated. Is there an ETA on System 3/4? It is a system I use frequently and have to try and approximate with System 1