ASHRAE Standard 90.1-2007

ASHRAE is making its energy standard, 90.1-2007, available as a free download for a limited time. Through a funding contract with the Department of Energy, the I-P edition of ANSI/ASHRAE/IES Standard 90.1-2007, Energy Standard for Buildings Except Low-Rise Residential Buildings, is being offered as a free downloadable PDF file. “Making the standard available for free ensures that it penetrates the marketplace and reaches owners, contractors and design teams," said ASHRAE President Lynn G. Bellenger, P.E.


For free download Click Here

Indoor Air Quality Guide Summary Guidance

The Indoor Air Quality Guide: Best Practices for Design, Construction and Commissioning is designed for architects, design engineers, contractors, commissioning agents, and all other professionals concerned with IAQ. This comprehensive publication provides both summary and detailed guidance.

To download the Guide for Free Click Here

ACREX India 2010

The largest international exhibition in India, ACREX India 2010 has been organized by ISHRAE in association with ASHRAE India Chapter and All India Air-Conditioning and Refrigeration Association (AIACRA). It starts on 17th February 2010 at Bombay Exhibition Center at Mumbai. It will be four days event.The exposition aims to showcase the global HVAC & R industry. Featuring a series of technical workshops and seminars on innovative technologies and product presentations. ACREX India 2010 exhibition will focus on air-conditioning, refrigeration, electrical engineering, building automation systems, fire detection & alarm systems, insulation, clean room products, cold rooms, energy recovery systems, security & access control, acoustic & vibration systems and all other HVAC related industries.

HVAC Formulas

1 TR = 12000 BTU/Hr

1Watt=3.412 BTU/Hr

1TR=3.516 Watts

1Watt=Q x Cp x Dt
Where Q - Flow of water in Ltr/Sec
            Cp - Specific Heat of Water (4.186 J/g'C)
            Dt - Temp difference in 'C

1TR = (gpm x Temp Diff in 'F)/24

Sensible Heat (BTU/Hr) = 1.08 x Q x Dt
Where Q - Air Flow Rate in CFM
           Dt - Diff of Entering/Leaving Air Temperature in 'F

Latent Heat (Btu/Hr) = 0.6 x Q x Dg
Where Q - Air Flow Rate in CFM
            Dg - Diff of Entering/Leaving Air Moisture Content in gr/lb

Pump HP = ((gpm x Pump Head in ft) x ( 3960 x Eff)) x Sp. Gravity)

Fan HP = ((( CFM x St.Pressure in Wg) x ( 6356 x Eff)) x (Density of Air/Density of Std Air))