Hi everyone,

   I am new at Home Performance and I am looking for some advise. I did a test in, where the water heater , washer and dryer, and fau is in a utility room in the house. It had 2 small vents for air and the water heater did not pass spillage during worst case. When I do the repairs what do I do first and how. Do I need to add more fresh air in that closet to help it vent, is that why it didn't pass ? Thanks for your replies

Judi

Views: 223

Replies to This Discussion

As a best practice the water heater needs to be replaced - a natural draft one has no business being in todays houses & should be replaced with a sealed combustion unit.

Okay I get that but that is not what I have to deal with. I will tell the client, but what steps do I take to find if it is clogged or just not enough air or ...?

Not to sound harsh but, you bring in a licensed specialist - full stop, end of story. You need to remember that you are like a family doctor. Once a known or possible issue is spotted that goes beyond what they are trained or knowledgeable about they automatically refer you to a specialist. Sure your family doctor may know what the issue is & maybe even know how to fix it, but that doesn't mean that they are going to propose that they do open heart, brain surgery, etc... themselves.

In this case I would say you need to bring in a licensed HVAC tech. While a plumber may have installed it, & possibly ran the one vent, the issue is with proper drafting, venting, etc... and they would have more knowledge about that. This also applies to your answer to Bud's question below.

But what if it is just a bird's nest - you still should bring in a specialist to clear it, check for other issues & reassemble it back together properly. I have seen to many people try to clear an issue & get everything out... well so they thought... needless to say they have either still had a blockage problem, have come close to or had a fire with some of the loose items falling further down into the venting

Now back to the "this isn't what I have to deal with", well actually it is as they have a naturally vented appliance inside a house and it should be removed (it doesn't matter if it failed or not). That should always be your first suggestion and note as worst case testing, never really is.

Hi Judi,  I'm kind of thick, fau I assume is an air handling unit/furnace.  I hate abbreviations. but that's just me.  Anyway, if that is a gas furnace I would also be concerned about sufficient air for it.  Clarify before I get too far out on the wrong limb :).

Bud

FAU stands for forced air unit. I thought maybe it needed more air too, but I am not sure and would like to know the steps to find the problem.

Your top priority needs to be to deal with these combustion appliances.  Either replace them with direct vent or electrical appliances, or move them to a part of the house where you can vent them without cooling down the whole house.  Keep in mind also, solar hot water as a potential option.  As you air seal and insulate, your worst case is only going to get worse. Whether the water heater is not passing because of lack of air or because the appliance is not operating properly is beyond my knowledge from here.. 

In regards to your last sentence... is it a plumber who will know? if it is working correctly or if it needs more air

Judi, Welcome.. Just a couple of questions: Was the DHW flue sized properly as per NFPA requirements? 40,000 BTU DHW = 4" vent pipe size. BTU rating of DHW unit? Was the DHW tank vented jointly with the furnace or orphaned? Outside temperture? Weather conditions?  Category 1 induced draft or atmospheric or category 4 90% furnace? and how well off are your customers? Thanks, Matt

It is 40K DWH w/ 4 in pipe. It is not joined with the FAU temp out side was 72 and clear. Natural draft. The FAU 's output  39000, the DWH is 40000btu. I don't know if there is a clog in the pipe or if I need more make up air or do I have to move the unit outside. The FAU is mecanically assisted. What is the fix here?

Judi

Do you remember the draft number on the DHW? Must be a small house if running only 39000 btu furnace or you're down south or out west. Their both vented alone? Draft number on FAU?  Vented to masonry chimney or B vent straight thru roof? Sorry for all the questions....Sounds like a clog....Birdsnest maybe. Check with mirror and flashlight. Possible return air leak in CAZ? Does it go real negative when air handler turns on? What's your worst case #? Add freshAir 80 or 100 could help....

 

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.

Latest Activity

Patrick MacRoy commented on Melissa Ulbricht's blog post How to Optimize On-Bill Financing to Help Illinois Building Owners Invest in Energy Efficiency
"Many of these recommended improvements are included the Clean Energy Jobs bill recently introduced…"
1 hour ago
Susan E. Buchan posted a status
"EEBA 2015 Conference Call for Papers extended! New deadline: 3/6/15 at 5 PM CT Submission details: www.eeba.org/conference/call-for-papers"
1 hour ago
Casey Gesell replied to Casey Gesell's discussion Looking for home improvement companies to join our dealer network!
"Hi Patrick, What is your time frame for relocating? Would you be interested in operating in the…"
3 hours ago
Todd Collins replied to Patrick Michaelyan's discussion Vinyl Siding with Integral Insulation
"Keeping air from getting into the wall assembly is important - so answer to your question air…"
4 hours ago
Sean Lintow Sr replied to Patrick Michaelyan's discussion Vinyl Siding with Integral Insulation
"You might want to check out BSC (Joe Lstiburek) perfect wall assembly As for builders & new…"
4 hours ago
Patrick Michaelyan replied to Patrick Michaelyan's discussion Vinyl Siding with Integral Insulation
"Todd, I've heard much said about this over the years. Quite frankly, my understanding of…"
5 hours ago
Todd Collins replied to Patrick Michaelyan's discussion Vinyl Siding with Integral Insulation
"might want to consider vapor permeability.   Need to move the dew point out far enough to…"
12 hours ago
bill lazar replied to robert jones's discussion Should your local weatherization company be required to have someone BPI certified on their staff?
"all this will be clarified soon with the new SWS guidelines mandated by DOE- but just WZ…"
12 hours ago

© 2015   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service