Existing HVAC within a New HVAC System

Nelina Loiselle

Above Green

LEEDuser Basic Member

173 thumbs up

September 27, 2012

I am working on a tenant space in which the HVAC system is going to be completely redone except for one existing HP unit. Does this existing HP unit have to be replaced to meet ASHRAE standards?

Post a reply

Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Fri, 09/28/2012 - 19:12

Nope, for ASHRAE 90.1 only the equipment you replacing needs to comply.

Elliot Young

Designer

Rinkachung Architecture

LEEDuser Basic Member

1 thumbs up

Fri, 11/30/2012 - 18:22

Marcus, I'm working on a project and our engineers think that they need to modify 80+ existing heat pumps in order to comply with this pre-requisite, potentially adding 50,000$ to a project that has already gone through bid. Could you post where i can find exact language for this requirement to prove that their interpretation is incorrect regarding existing HVAC systems? Thank you in advance.

Christopher Schaffner

CEO & Founder

The Green Engineer

LEEDuser Expert

630 thumbs up

Fri, 11/30/2012 - 20:40

90.7-2007, Paragraph 6.1.1.3 - Alterations to Heating, Ventilating and Air Conditioning in Existing Buildings. This section outlines when when equipment must meet minimum efficiency standards. There is no requirement to upgrade existing to remain equipment or existing relocated equipment.