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Summary Report
Total Energy Use
Other Use
HVAC System
Interior Conditions
Ambient Conditions
AC Scatter
HW BTU's and Flow
Other Submetered
Kitchen Submeters


This research site monitors the electrical consumption as well as the interior space conditions of Florida's first production built, net zero energy home. Located in Gainesville, Florida, it is a single story three bedroom + office/ two and half bath home with 2248 sqft of living space and a HERS rating of -2. Energy consumption is offset by a 6.75 kW photovoltaic system. It has double pane, low e vinyl windows, R-15 wall insulation, R-30 ceiling, and a radiant barrier. Heating and cooling is provided by a 2.8 ton, SEER 16 heat pump with all ducting in conditioned space. The house has all Energy Star appliances, 100% CFL lighting, water saving plumbing fixtures, and an 64 sq. ft/120 gallon drainback solar hot water system. It was built by Tommy Williams Homes. Data collection began in May 2010.

Oct 18 2012, 00:15 -To- Oct 19 2012, 00:00 EST

Electric Energy Use/Production

Peak kW

Consumption from Utility 3.2 24.3
PV production 5.9 31.1
Fed back to Utility 5.0 26.1
PV used by house 1.2 5.0
Net purchased electricity 3.2 -1.7

Selected Electric End Uses

Peak kW

Total house consumption 3.7 29.3
A/C Condenser 2.0 8.3
Air Handler 0.4 1.9
Hot water 0.0 0.0
Other 3.1 19.2

Indoor Conditions


Thermostat Temp (F) 73.8 69.3/ 77.8
Thermostat RH (%) 45.1 37.3/ 52.3

Weather Conditions


Ambient Temp (F) 72.8 63.5/ 88.3
Ambient RH (%) 77.5 45.4/ 96.4
Horz. Plane Irradiation (wh/m2) 4150.9 0.0/ 860.0
PV Plane Irradiation (wh/m2) 4548.2 0.0/ 873.0
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