See all forum discussions about NC-v4 EAp2
 Subscribe to new posts about NC-v4 EAp2 Post a new question aboutNC-v4 EAp2
See LEEDuser’s guidance on NC-v4 EAp2»
FAQs about EAp2 :

Do the required savings for this prerequisite (and credit) need to come only from building energy, or also process loads?

Our project doesn't have enough energy savings to earn the prerequisite. Can we get there by incorporating onsite renewables?

Our proposed design has insulation R-values that are below those prescribed by ASHRAE 90.1-2010. Can we still meet the prerequisite?

View answers »

Forum discussion

NC-v4 EAp2:Minimum energy performance

Heated Pool - Baseline Service Hot Water System

Default Avatar
Ricardo Sá
Director of Sustainability
Edifícios Saudáveis Consultores (503 910 767)
LEEDuser Basic Member
79 thumbs up

Dear All,

 

we’re currently developing energy simulation of an hotel that will include heated pools (both indoor and outdoor). These pools will be probably heated using dedicated heat-pumps (but gas boilers are not yet disregarded).

 

According to Table G3.1 item 11 (from ASHRAE 90.1-2010), baseline building service hot water system shall be electrical resistance as long as proposed building uses electricity as energy source for its DHW system (“where energy source is electricity, the heating method shall be electrical resistance”). Given this, we will consider that baseline building uses electrical resistances for pool water heating.

 

Can you please confirm that this understanding is correct?

 

Thanks in advance,

0
Post a reply

You rely on LEEDuser. Can we rely on you?

LEEDuser is supported by our premium members, not by advertisers.

Go premium for $15.95  »

Profile picture for user sheffer
Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Mon, 05/18/2020 - 14:04

Pool wter heaters are not regulated by 90.1 and this load is considered a process load which is modeled identically in both models.
Default Avatar
Ricardo Sá
Director of Sustainability
Edifícios Saudáveis Consultores (503 910 767)
LEEDuser Basic Member
79 thumbs up

Tue, 05/19/2020 - 08:09

Hi Marcus,   Thank you for your feedback.   ASHRAE 90.1-2010 includes a section with requirements for heated pools (section 7.4.5). Table 7.8 from the same standard also includes efficiency requirements for pool heaters. Given this, we assumed pool heaters were included in the scope of 90.1. Can you please confirm?   Regards,

Tue, 05/19/2020 - 13:55

Hi Ricardo, You are correct; the Baseline should reflect the mandatory and prescriptive provisions noted, and savings may be claimed for improved efficiencies. Note that the pool losses and operating schedules should be identical (conductive, evaporation, etc.). Regards, Cam

Add new comment

To post a comment, you need to register for a LEEDuser Basic membership (free) or login to your existing profile.