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I think the real advantage is avoiding useless manufacturer's service contracts. If the software is open and accessible then it ensures excellent (ie competitive) service. From a recommissioning perspective it's great to have a crackerjack service company to work with rather than an over-paid...

I'm attempting to balance all of the water outlets in an existing bldg with the historical records (ie a water audit) and want to make sure I don't put too much in the "misc" category. I was thibking that I might take a percentage of the recommended daily water intake per occupant as an...

Does anyone know of any resources or standards that specify how to calculate annual water consumption for potable water fountains based on occupancy for commercial buildings? I'm thinking ASHRAE or LEED...?

imok2 This is unbelievable! How did you find this so fast?! Thanks a million. Matthew

OK. I'm trying to decide if the energy conservation measure (ECM) I am about to describe is a waste of time to model or has merit. I was up on a roof of a warehouse and recorded a roof temperature, in August, of 60°C (140F)and a EAT/LAT on a condensing unit of 45/52°C (113/126F). I am wondering...

Thanks tys90 and mauricestoker. The FTG manual is new to me and looks like a fan-tastic resource ;-)

The ASHRAE Fundementals Handbook (27.20 in the 2005 edition) has a section on residential infiltration that is helpul. Also the Energy Management Handbook has a section on infiltration (Sec 9.2). All approaches are very rough estimates. I've attached a spreadsheet that I made (also a rough...

If you want to calculate the energy savings and simply ignore what has happened (not good engineering ethics but adequate to fulfill your boss' request ;-) ) you can: (1) strap a power logger to the MCC fan feed and measure actual consumption, (2) if your electrical vault has a power quality...

Hi michael333 I have done a little with LEED EBOM (facility GAP analysis not actual policy writing) and have the understanding that your policy is simply an internal directive telling your staff what to do when presented with an operational option. So if it is purchasing cleaning supplies you...

Greetings! I'm new to this forum but whenever I use Google to find engineering answers I find this forum. I am recommending a face and bypass damper retrofit for a large (60,000 CFM) existing fan system with the intent of saving fan energy. I'm approaching this with the fan laws in hand and...