Hi Madhav,

I believe there was enough inference to confirm it was option B, through
all the replies received on this.
In Canada, depending on different provinces/jurisdictions, we optionally or
mandatorily need to report TEDI for the project. The TEDI reporting however
is only for heating due to envelope and ventilation.

I would like to take the opportunity to introduce the concept of TEDI
optimization through parametric modeling, which we have started offering
for projects in Canada. I believe this can be very useful for every project
pursuing stringent TEDI targets, as the optimization feature on parallel
coordinates can potentially save a lot on capital costs. In one of our
most recent small multi-unit residential projects admeasuring just a 20,000
sqft building, the targeted TEDI range was achievable through options that
differed by up to $175,000 in their capital costs, enabling the design team
to find out the most cost-optimized TEDI for the design (see attached
image). Note that our process is not algorithm based, but each unique
simulation is actually set up and run on IESVE to derive the results. I am
sure the process can save 10's to 100's of thousand dollars, depending on
the size of the projects.

We typically use our optimization process for whole building KPI
optimization (cap/op cost, % energy/GHG savings, ROI, etc) which includes
parametric modeling of all the predetermined energy-impacting design
variables like walls, roof, floor, window, WWR, infiltration, lighting,
HVAC, ERV. Each variable is attributed with its cost metric, to calculate
the absolute capital cost for each unique combination. More information can
be found in this quick 4 min video:
https://ecomatrix.io/product-tour/

Though full optimization projects are heavier on time and effort due to
accurate parametric modeling of HVAC systems, TEDI optimization is a more
simple form of optimization that can be produced with lower effort and
relatively quick turnarounds. I look forward to getting your (and the
experts on this list) feedback on this and would be very happy to answer
any questions as well.

Thanks,
Anup Rathi