Comment Log Display

Comment Log Display

Below is the comment you selected to display.
Comment 12 for 2030 Scoping Plan Public Workshop on GHG scenarios, NWL, public health (sp2030scenarios-ws) - 1st Workshop.


First Name: Sean
Last Name: Armstrong
Email Address: seanarmstrongpm@gmail.com
Affiliation: Redwood Energy

Subject: All-electric with high performance heat pumps is less expensive to build and operate
Comment:
Hi CARB Staff,

In our design practice of ZNE housing, our primary task is
understanding the energy consumption of various design strategies,
and the cost of each alternative. We have retrofitted 6000
residences with solar, 1500+ of them to 100% ZNE, in the last five
years. Over that period the performance of heat pumps has improved
from EF = 2.35 to EF = 3.4, and HSPF = 11 to HSPF = 14. Gas has not
improved past EF/AFUE = .98, and absent the experimental gas fueled
heat pump of EF =1.2, gas has reached its' theoretical limit of
burn efficiency. Consequently we have found this year that
all-electric utility bills are now cheaper than gas hybrid bills,
and the higher costs with gas equipment vs. heat pumps will almost
certainly grow next year, and into the future.  Over our five years
of ZNE consulting we have found uniformly that projects save
$2500/apt or more, and $4500/house was documented by KB Homes. We
have reached the point where even with historically low gas prices
and high electricity prices, all-electric, high performance (e.g
2016 Code) houses are cheaper to build and cheaper to operate. 
Please focus on the cost-effectiveness of all-electric housing,
which saves money for the builder/developer and the buyer or
tenant, as well as supports 100% solar offset and uses a rapidly
decarbonizing grid.
Sincerely,
Sean Armstrong
Managing Principal
Redwood Energy

Attachment:

Original File Name:

Date and Time Comment Was Submitted: 2016-11-17 11:47:41



If you have any questions or comments please contact Office of the Ombudsman at (916) 327-1266.


Board Comments Home

preload