FSEC Research Presented at 2014 ACEEE Summer Study on Energy Efficiency in Buildings

FSEC researchers presented their research findings at the 2014 ACEEE Summer Study on Energy Efficiency in Buildings in Pacific Grove, CA on August 17-22, 2014. Check out their research publications:

3D view of exhaust fan

One study met ASHRAE 62.2 levels of ventilation with a high quality, quiet exhaust fan rated for continuous runtime, with an insulated exhaust duct to limit condensation.

What are the implications of mechanically introducing humid outside air into residential buildings, compared to the indoor air quality benefits?

Take a look at the results of a study of 10 homes in Gainesville, FL that includes impact on energy use, comfort, durability, and cost.

 

In another study of mechanical ventilation in homes, two lab homes, constructed to represent characteristics of typical existing Florida homes, were monitored. They were configured with tight and leaky building envelopes, and with and without mechanical ventilation. Simulation results of high performance new homes with mechanical ventilation, and typical older homes with and without air tightening and mechanical ventilation, were also presented.

Most states have adopted commercial and residential building energy codes and many are planning adoption of more conservative codes over time. Decreased energy use will help improve conservation, but how well are energy codes enforced? This paper describes the research method, audit procedure and results, which include a list of the top occurring areas of non-compliance and suggestions to improve compliance enforcement.

 

Photo of smart power strip with seven electrical outlets.

The Smart Strip SCG3, which has 7 outlets, was used in this retrofit study.

How much energy can you save by retrofitting your lighting and using advanced power strips in your home? Find out in the research publication below, in which 56 all-electric Florida homes were evaluated.

 

 

 

 

Photo of air conditioning unit

Can oversizing a variable capacity heat pump air conditioning system save energy?

Oversizing of fixed-capacity (FC) heat pumps and air conditioning systems is understood to reduce space conditioning energy efficiency, and is not permitted or at least severely restricted by various standards, state codes, and programs. FSEC research found, however, that oversizing variable capacity (VC) heat pump systems substantially decreases energy consumption. This paper support right-sizing FC systems, but oversizing VC systems.

 

Photo of a five story multifamily building.

One affordable multifamily developer is exceeding minimum energy code by 40 percent.

Florida recently implemented a new method for determining utility allowances for low income housing tax credit properties that provide new incentives for energy efficient construction. These incentives have driven one affordable multifamily developer to exceed minimum energy code by 40 percent in new developments since 2011 encompassing over 1,400 residential units in 15 properties. Tenants benefit from enhanced humidity control, comfort and indoor air quality. This paper shows how energy efficiency is making its way into a building sector that has traditionally been hard to reach.

 

Shallow retrofit measures included changing to CFL or LED lighting.

Shallow retrofit measures included changing to CFL or LED lighting.

In collaboration with Florida Power & Light (FPL), FSEC is pursuing a phased residential energy-efficiency retrofit program in Florida. This research is to establish annual energy and peak energy reductions from the technologies of two levels of retrofit – shallow and deep, with savings levels at the high end expected to reduce whole-house energy use by 40%.

Energy end-use savings and economic evaluation results from the phased measure packages and single measures are summarized along with lessons learned from a sample of 60 existing, all-electric homes.

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One Response to “FSEC Research Presented at 2014 ACEEE Summer Study on Energy Efficiency in Buildings”

  1. Tom Fullam Says:

    Because the air inside the home will always be drier that the air outside in this
    climate the continuous ventilation should be on a pressurized intake set at the ASHRAE 62.2 standards. This would prevent intake of building shell pollutants
    and insure a drier healthier shell at leak points. Air would also be discharged
    out kitchen and bath fans even when not operating reducing moisture in those
    areas. I expect to try this soon with the pressurized air supply directed at the
    intake of the interior unit on a air source mini-split heat pump. The manufactured home would also use a heat pump water heater for additional
    drying and cooling capacity. Standard 2 x 6 walls will be insulated with 5.5″
    Roxul batts, R-23. The roof will have an SRI of 70 or better. A solar carport
    should round out the project.
    I would appreciate any comments on the plan, especially negative.
    Thanks,
    Tom Fullam

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