21 Feb '12, 7pm

Green Building Q&A: dual fuel heating system - thermostat?

We recently built an addition onto our house and instead of extending our existing AC-only system, we installed a second AC/heat pump system. The house also has an oil-fired boiler with baseboards. We added two heating zones to the addition onto the existing hydronic heating system, so the addition has two heat sources - oil and heat pump. My question is this - is there a thermostat available that would only fire the boiler when it gets cold enough for the efficiency of the heat pump to drop below a certain rating? Here in western VA it often gets warm enough - like today it is 47F outside - that I believe the efficiency of the heat pump should exceed that of the boiler. What I would like to have is a thermostat with an outdoor temperature sensor that allows me to use the heat pump when the temps are moderate, and the boiler when it drops below a certain temperature. Thank...

Full article: http://www.greenbuildingadvisor.com/community/forum/energ...

Tweets

fuel recharge

fuel recharge

proudduck.com 03 Mar '12, 11am

Can you imagine being the only guy in an office of girls? You should see our toilet –> all sorts of pads and pantiliners d...

Green Building Q&A: Can a hydronic radiant heat...

greenbuildingadvisor.com 23 Feb '12, 7pm

I am building a well insulated house in NW Ontario, Canada I have been debating on the method of heat supply. I am leaning...

20MW Solar Array & Biogas Fuel Cell Touted for Apple's NC Data Center

20MW Solar Array & Biogas Fuel Cell Touted for ...

treehugger.com 21 Feb '12, 7pm

When I posted on Apple's plans to install a large solar array at an NC data center , details were still sketchy. But those...

Green Building Q&A: Geothermal considering heat...

greenbuildingadvisor.com 14 Feb '12, 3am

so I've read a few threads here discussing geothermal (ground source heat pump) but they all seem to focus on the heating ...

Singapore e-commerce gets LiveJournal's new che...

sgentrepreneurs.com 21 Feb '12, 8am

At last: Full-fledged e-commerce system comes to LiveJournal February 21, 2012 by Terence LEE LiveJournal has been a popul...

New automatic climate control in the BMW 3 Seri...

greencarcongress.com 20 Feb '12, 3pm

New automatic climate control in the BMW 3 Series improves both air quality and fuel economy 20 February 2012 With the new...