Which of ASHRAE standards that you have to follow in LEED projects?

In my opinion

ASHRAE Standard 189.1, Standard for the Design of High-Performance Green Buildings Except Low-Rise Residential Buildings 

55: thermal comfort

62.1: indoor air quality

90.1: building energy conservation

135: BACnet (building automation & control)

ASHRAE standards use for LEED Certifications are 90.1, 52.2, 189.1.

ASHRAE Green Guide: The Design ,Constuction ,and Operation of Sustainable Building.

ASRAE 55 Thermal Comfort

ASHRAE 62.1 Indoor Air Quality

90.1: building energy conservation

62.1 for indoor air quality and ventelation

55  for thermal comfort and HVAC

90.1 for Energy in the building and Energy modeling 

 the standareds are 90.1, 52.2, 189.1.

ASHRAE 189.1 Standard for the Design of High-Performance Green Buildings

ASHRAE 90.1 Energy Standard for Buildings Except Low-Rise Residential Buildings

ASHRAE 52.2 Method of Testing General Ventilation Air-Cleaning Devices for Removal Efficiency by Particle Size

AHRAE 62.1 Ventilation for Acceptable Indoor Air Quality

ASHRAE Fundamental

ASHRAE 62.1 Ventilation

ASHRAE 90.1 Building Energy conservation, with exception of low rise buildings.

ASHRAE 90.1 Building Energy conservation

ASHRAE 62.1 IAQ

In my opinion

as well as ,as per HAP 4.9

Ventilation standard :62.12007

Energy standard 90.12010

and LEED 2009