HVAC (42)

Discussions Replies Latest Activity

Does altitude affect AFUE? or just the input/output BTUs?

I searched and searched and searched yesterday for an answer to the question "Does altitude affect AFUE?" but did not come up with any defi…

Started by Rod Fox

7 Jun 17, 2014
Reply by Rod Fox

Think of the house as a really big duct

There is an article in the June 9 issue of ACHR News magazine that might help a lot people understand why the house is really part of the d…

Started by Frank Spevak

0 Jun 13, 2014

Thermostat set points

I have a programmable thermostat that is, well, dumb. It is willing to set times and abide by those, but it doesn't take in to account the…

Started by daniel manriquez

5 May 17, 2014
Reply by Bob Blanchette

UV light in Furnace?

Had our furnace and air ducts cleaned today for the first time in years; could have spun an entire dog from all the embedded hair.  The ser…

Started by Home Energy Magazine

29 Mar 25, 2014
Reply by Brett Little

LBNL looking for HVAC contractors that service Small Commercial

Our team at Lawrence Berkeley National Laboratory has developed an Energy Management Package to target small commercial buildings that is d…

Started by Erin Hult

9 Feb 15, 2014
Reply by Curt Kinder

Low Gas Pressure

I have been running no heat calls all day - today I have found  lots of very low gas pressure you can run the Nat Gas hot water heater or 9…

Started by Eric Kjelshus

8 Jan 15, 2014
Reply by Tom DelConte

Troubleshooting a Furnace Blower

Looking for some help troubleshooting this furnace blower issue! Carrier Model 58CTX070 Furnace is not delivering much air to supply gril…

Started by Bachi Brunato

12 Jan 5, 2014
Reply by Bob Blanchette

Geothermal Indoor Air Quality

I'd like the experts here to weigh in on this.  I've been hearing a lot of claims about the better IAQ you get with geothermal systems.  In…

Started by Trish Holder

2 Dec 27, 2013
Reply by Eric Kjelshus

Student needs help for HVAC research project

Hi, I am a Building Science student, working on a residential HVAC research project. Specifically, I am comparing the following types of sy…

Started by Lena Burkett

7 Nov 22, 2013
Reply by prisco tammaro

Underground ductwork

Do you think the air loss will be minimal in the following situation Underground duct with some separation at the joints, trenched and enc…

Started by Kevin

19 Oct 8, 2013
Reply by Bob Blanchette

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