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: 291

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

Discussion Forum

Water Saver or Gimmick?

Started by Sean Lintow Sr. Last reply by David Butler on Friday. 22 Replies

Moisture/Mold on rim joist

Started by John Shillito. Last reply by Bob Krell on Thursday. 11 Replies

Radon - Passive Systems

Started by Sean Lintow Sr. Last reply by Bryan Gabriel Jan 5. 5 Replies

Vented Soffit! DO or DON'T?

Started by Daniel Baur-McGuire. Last reply by Daniel Baur-McGuire Nov 15, 2016. 13 Replies

Duct Testing - is a change in order?

Started by Sean Lintow Sr. Last reply by Sean Lintow Sr Aug 6, 2015. 20 Replies

Latest Activity

Profile IconAvery T. Phillips, Sarah Burger, Troy Spindler and 2 more joined Home Energy Pros Forum
12 hours ago
David Butler replied to Brad Cook's discussion Too many Heat Pump Water Heaters in a basement?
"theoretically, let's say you perfectly isolate the HPWH from a heat source. The HPWH's…"
yesterday
David Butler replied to David Butler's discussion How would you insulate this roof?
"Interesting idea. Commercial roof on a slope! Typical density for roofing spray foam is 2.5 to 3.0…"
yesterday
Profile IconRandy Kinnison, Breanna Detwiler, Jeff Farlow and 7 more joined Home Energy Pros Forum
yesterday
Summer Redman added a discussion to the group Job Board
Thumbnail

Hiring 2 Training Specialists in Champaign-Urbana, Illinois

The Applied Research Institute (ARI) at the University of Illinois at Urbana-Champaign is seeking…See More
yesterday
Summer Redman 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
yesterday
Stacie Bagnasco replied to Evan Mills's discussion Dirty solar panels
"This is a great idea. I clicked on your discussion because it made me remember that I forgot to get…"
yesterday
Kirsten Richnavsky posted an event
Thumbnail

rCloud - The Future of Testing at Your Office or Home

October 18, 2017 from 2pm to 3pm
Integrating rCloud as an essential part of your RESNET QA process.Retrotec’s rCloud app is here,…See More
yesterday

Photos

Loading…
  • Add Photos
  • View All

© 2017   Created by Home Performance Coalition (HPC)   Powered by

Badges  |  Report an Issue  |  Terms of Service