The goal of the study is to learn whether these electric thermal storage heaters, can help reduce home heating costs and improve air quality, especially the worst PM2.5 particulates. The boxy units are called Electric Thermal Storage Heaters, or ETS heaters, and they run on electricity. Dr. Dominique Pride of the Alaska Center for Energy and Power explains how they work.
“They kind of act like a thermal battery; a coil heats up high-density, ceramic bricks, and it's in an insulated compartment. And so that heat can be stored in that compartment for like up to 24 hours.”
Pride and her research associate, Alana Vilagi, are trying to see if households would heat with the ETS units and displace a portion of their wood heat. For the study, they have picked two neighborhoods north of Hurst Road, where some terrible winter air quality has been recorded. Homes are trapped in a bowl of land that is capped by a warm air inversion, sealing air pollution in.
“Once the temperature inversion traps air close to the ground, then everything that we emit into the air just sits there, for days, weeks, however long the inversion lasts until it finally blows out.”
Pride says burning wood for home heating is currently the largest source of PM2.5 air pollution in the area. It is also the cheapest. There are no natural gas lines installed in the neighborhoods picked for the study.
“PM 2.5 is very bad for your health, but on the other hand, wood is by far the cheapest way to heat your home, especially households that don't have a lot of money to spare. They just can't afford to heat 100% with heating fuel oil. It…it puts a lot of households in a difficult position of choosing between healthier air quality and more affordable home heating.”
In the first year of the study, about 100 households will get Purple Air outdoor air quality sensors to gather baseline data. About 20 of those households will also get a weather station to gather weather data.
In the second year of the study, one neighborhood will be selected as a control group, and the other will have 50 ETS heaters installed in homes that currently use fuel oil and wood.
Participants will receive a monthly credit on their electric bill.
“If we install these into people's homes, A. do they use them? B. if they do use them, how does it affect home energy costs? and C. how does it affect air quality? Because maybe they use them to displace a portion of their wood heat, or maybe they don't use 'em at all, or maybe they use 'em and it displaces the heating oil component of their energy next for their house.”
Pride says they are still recruiting for study participants.
“We’ve gone knocking on doors in North Pole, and we are signing people up.”
Folks can find out more about the program at the website the Alaska Center for Energy and Power set up for the field study.
The study will have implications for other places in Alaska, particularly where there is sometimes excess electricity, like in villages with wind turbines.
