FAQs about EAp2 :

Can the Passive House Planning Package (PHPP) be used to energy model for LEED?

Is it acceptable to model a split-type AC with inverter technology compressor as a heat pump, like modeling VRF?

Can the Trace 700 'LEED Energy Performance Summary Report' by uploaded to LEED Online in lieu of the Section 1.4 tables spreadsheet?

A portion of our building envelope is historic. Can we exclude it from our model?

Which baseline HVAC system do I use if my building has no heating or air conditioning?

For an existing building, do I need to rotate the model?

Our project has a diesel backup generator. Should we include it in our energy model?

Our project has a large process load—75%. Despite our efforts to make an efficient HVAC design, the cost savings are minimal. What can we do to earn this prerequisite and be eligible for LEED certification? Is there any flexibility in how we model the p

Can SHGC be higher in the proposed than in the baseline model?

Our process load is higher than 25%. Do we have to justify that?

Do I need to justify the electrical and fuel rates I am using in my model?

Our local code references ASHRAE 90.1-2010. Should I use that for my documentation, or 90.1-2007?

Can I claim exterior lighting savings for canopy lighting even though a baseline model cannot include shading elements?

The project is built on a site with existing exterior lighting installed. How should this be accounted for?

Can mezzanines open to floors below be excluded from the energy model?

How do I provide a zip code for an international location?

For a project outside the U.S., how do I determine the climate zone?

For a project outside the U.S., how do I determine the Target Finder score?

Do hotel rooms need automatic light shut-off control?

How commonly are the 90.1 mandatory compliance forms submitted as part of EAp2/EAc1?

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Forum discussion

NC-2009 EAp2:Minimum Energy Performance

Costs for on-site renewable energy

It is required to factor in the initial equipment installation costs when calculating the annual cost for on-site renewable energy for a proposed building? For a PV system, the initial costs are quite high, but the annual cost for the energy produced is near zero.

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Wed, 02/19/2014 - 21:45

The "annual cost" is really the avoided annual energy cost, so no you do not include the initial equipment costs. So if a PV system produces 1000 kWh per year then you multiply that times the virtual electric rate to determine the annual cost.

Wed, 02/19/2014 - 23:43

So the calculated virtual electric rate for a building using total of 10,000 kwh total would be: From Utility Company: 9,000 kwh at $0.25/kwh = $2250. From PV: 1,000 kwh at $0.00/kwh = $0 Virtual rate: $2250/10,000 kwh = $0.225 per kwh Is this correct?

Thu, 02/20/2014 - 01:16

Building consumption (not accounting for the PV) is 10,000 kWh and electric cost without the PV is $2500. Virtual rate is $0.25/kWh. Virtual rate times 1000 kWh produced by PV equals a $250 renewable contribution.

Thu, 02/20/2014 - 02:56

Marcus, Thanks for the clarification.

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