I was looking to beef up my offerings for standard energy audit and feel like some quick screening tests for HVAC would be great. The only test I currently do is a dominate duct test. 

Since I am lacking on the HVAC knowledge side, I would also like to know how to interpret those tests - I am sure someone will suggest a static pressure test - so, how do you perform and what is normal and what actions do you recommend for results outside of normal.

Views: 1261

Reply to This

Replies to This Discussion

Ted

I can do a blower door test, and IR scan and a flow hood round in 45-60 minutes.  A quick look at the bill and out of the house in 1-1/2 hours.  This is just a comfort diagnostic and not a BPI audit.  I don't want to do static pressure (my staff is told not to do them even though they have and understand them) because, as stated earlier, I don't want to drill a coil.

Ed, I think some furnaces simply (and literally) scream for ESP.  It takes 3 minutes, and can really help design.  I hate being at design stage and having questions about simple things. One less thing to guess about.  I bought a Testo manometer for the purpose, and for room to room when the interview uncovers problems in very specific locations I'm trying to get my head around. I'm not a DG700 whiz (unlike http://bit.ly/rickchitwood), and prefer to leave that to manage cruise control. 

I'm not typically done with my interview until the 90 minute mark.  When I was just "selling" audits and not performing them, I was usually in the house 2.5-3 hours.  

If I'm gonna spend a bunch of time scheduling, then going to someone's house, I want to get as much out of the visit as I can.  And I don't want to miss something critical that might mean the difference between winning and losing.  

It takes most people hearing something 7 times before it sinks in.  So if I say something 4 times on the first visit, we are half way there. 

My auditor and I had a GREAT relationship, we significantly overlapped which meant really collaborative design process, and big jobs (12-60k with 20-30 being the most common range).  The information I gathered often meant he didn't have to go back because he missed something, and vice versa. 

And I think by having people feel they really understand the logic behind design, and feel it was really tailored to meet their needs, makes them much more comfortable signing big contracts. 

on the side of the furnace is listed the temp rise, Most/all furnace that have high static pressure will also have high temp and will go on off the high temp switch.  This switch is on all 80% and 90% gas and LP gas is listed the what the top temp is.  I take out the high temp switch and do a static pressure test BUT I do this all the time for 30 yr.  If you do it hot you can and will short the low volt fuse so know your stuff before working on furnaces.  If I do a quick temp test I take out a screw and put in a "K" wire then read off my test meter.  I bench mark the furnace with 4 temps  and CO 

There are a bunch of things you can do to evaluate an HVAC system.  A static pressure test is a good one for getting a grip on air flow BUT the industry is now saying (and correctly so) that the air handler and any associated coils need to be as clean as "new".  This is a good call because the blower CFM data is set by testing "new" units.  The most you could get from a static pressure test without cleaning everything (blower & coil) is whether or not it is performing to specs.  If not then it's time for the deeper look or a call to your local HVAC shop.   

Checking performance of a HVAC system includes a lot of options depending on many variables.  The best approach is to work through the entire system...looking at everything.  We don't see too many Home Performance folks coming in to learn HVAC but we do see a lot of HVAC folks coming in to learn Home Performance.  If you are interested in getting deeper into HVAC we have many courses and programs that take you there @ www.hvacredu.net

All are BPI recognized. 

 

 

Craig

Thanks for asking.

Some great info here I can easily use.

RSS

Home Energy Pros

Home Energy Pros was founded by the developers of Home Energy Saver Pro (sponsored by the U.S. Department of Energy,) and brought to you in partnership with Home Energy magazine.  Home Energy Pros is sponsored by the Better Buildings Residential Network.

Latest Activity

Green Training USA posted events
1 minute ago
Crosbey Archery posted a photo

Timber-Double-doors

This door is made and hand finished at Bradford workshops by skilled craftsmen.…
4 hours ago
Green Training USA updated an event
Thumbnail

BPI CEU's - Online Anytime at Online

December 4, 2014 to December 3, 2015
Get All 30 BPI CEUAvoid BPI's Written Exams for Certification Renewal…See More
4 hours ago
David I. Shepherd-Gaw added a discussion to the group Job Board
Thumbnail

JOB: Energy Efficiency Specialist @ Cowlitz PUD

Primarily a position with a residential focus in a great community. Opportunities to expand your…See More
9 hours ago
David I. Shepherd-Gaw joined Diane Chojnowski's group
Thumbnail

Job Board

This group is for posting jobs related to all aspects of the home performance industry including…See More
9 hours ago
John Wilkerson posted a discussion

Aeroseal Machine for Sale

Hello All, We have an Aeroseal SmartSeal system (w/ compressor and plenty of leftover…See More
10 hours ago
Rob Buchanan commented on Jose Macho's blog post Why Don't Homeowners Spend Money on Energy Saving Upgrades??? Blame "Cognitive Biases"
"I think this is an interesting comparison, but I would also want to know whether similar surveys…"
17 hours ago
Bob Blanchette commented on Jose Macho's blog post Why Don't Homeowners Spend Money on Energy Saving Upgrades??? Blame "Cognitive Biases"
"The bigger problem is the way water is billed. Most of the charges are a fixed monthly amount that…"
17 hours ago

© 2015   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service