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Any other comments/suggestions?? Thanks..

You can use DesignBuilder software for your load calculations (www.designbuildersoftware.com/designbuilder.php). You can download fully functional 30 days evaluation version. This way you do not need to pay. It uses ASHRAE heat balance method for load calculations. It uses E+ simulation engine.

ChrisConley, ASHRAE 90.1 requires sizing of 1.25 for heating and 1.15 for cooling so I was just averaging it out. In general do you think this methodology is correct? Any suggestions will be highly appreciated?

The buildings are air-conditioned. My tool deals with commercial buildings though the residential buildings are also part of it. Buildings can be any size, shape and have option of defining insulation..

Hello, I am planning to include system sizing in my simulation tools. The idea is to find out the cooling/heating system size reduction due to a particular energy efficiency measure. I need to provide a general approach. here is what I am thinking: 1. calculate cooling/heating loads for all the...

Thank you everyone for suggestions. I really appreciate it..

Thanks everyone.. When I look at the report sent by the designer - it says, "Calculations are based on 8th edition of ACCA manual J). Yes, this is a small office building not a residential. I am sure one needs take into account the equipment and lihting loads for colling load calculations and...

Hi, I am comparing load calculations using manual J and heat balance method for a small office building in Boston. Can anyone let me know what are the internal loads/lighting and minimum ventilation air requirements are considered in Manual J calculations. Also this is a code minimum building...

Yes, that is the intention. The warm air from sunspace will drive the flow.. thanks MSB

Hi, I am designing a solar passive home. The sunspace on south gets heated and I would like to transfer this warm air to another rooms using vents (No forced ventilation). I was thinking of providing a 2 m2 vents between sunspace and one of the rooms. My question is : How much CFM can be pass...

With E+ I get : Heating load of 16016 Btu h. - with 1.25 capacity margin the system would be 20,020. Does it look reasonable? For cooling it would be 15,800 Bth ( approx 1.5 Tons). Assumed lighting load of 0.6 W/ft2 and equipment (internal) load 0.4 W/ft2.. the ventilation was o.35 ach.. Both...

Thank you everybody for your help. I am using E+ to get the load. It was my first time so just wanted to make sure my numbers are not way off. I really appreciate it.. MSB

Thanks Don... I was looking for the range.. something like kBtu/hr/ft2 or Tons/sf...general numbers not specific..

Hi, I am looking for ball park number for heating/cooling system sizes for a 2 story home (well insulated/E* windows)- approx 1500 sf located in MA. I aprreciate any help/suggestions.. thanks..

Bvanhiel, You can also try DesignBuilder software (www.designbuildersoftware.com). It is not a free program but you can use 30 days demo version. Demo version has no limitations and I think will serve your purpose..

VinceNy, I use these dampers (in my model) for natural convection.. Do you know any manufacturer who makes these dampers.. thanks..

Thanks gepman for your response. I am using natural convection model which will allow air flow through dampers from basement to attic through middle floors. The vents used need to have some mechanism (including the material) of switching off in case of fire. i.e in case of fire the attic vent or...

Hi, I am modeling a residential building with natural convective loop around. The architect is concerned about the fire and fire code. Does anyone know of fire proof dampers/vents? Your help is highly appreciated.. Thanks,