Replace powered vent hot water heater w/ direct powered vent

Users who are viewing this thread

Renmtpdb

New Member
Messages
7
Reaction score
0
Points
1
Location
Elgin Il
Looking for advice. I’m replacing 2x 40 gal hot water heaters. Both are powered vent exhaust drawing room air for combustion. They are not in a confined space. Big basement with lots of room.

Lowes delivered 2x 40 gal AO Smith with powered direct vent. This style is designed to draw supply air from the outside. Question, the current powered vent draws inside air. So do both of my HVAC units. Is there any reason why powered direct vent can’t use ambient air??
 

Reach4

Well-Known Member
Messages
39,247
Reaction score
4,531
Points
113
Location
IL
The advantages to drawing air from the outside include that drawing air from the inside will cause cold or hot air to infiltrate into the house to make up for the air removed from the basement. If you draw extra air in during the winter, you lose heat and humidty both. In the summer, you would bring in air and humidity.

But to address your question, I don't know.
 

Renmtpdb

New Member
Messages
7
Reaction score
0
Points
1
Location
Elgin Il
Thanks Reach. I connected with AO Smith and they advised against replacing a powered vent with direct powered vent. They claim the unit is “balanced for outside ambient air”. Still confused why inside ambient won’t work other than effecting the efficiency rating. Anyway, gonna follow their recommendation.
 

Fitter30

Well-Known Member
Messages
4,573
Reaction score
863
Points
113
Location
Peace valley missouri
Thanks Reach. I connected with AO Smith and they advised against replacing a powered vent with direct powered vent. They claim the unit is “balanced for outside ambient air”. Still confused why inside ambient won’t work other than effecting the efficiency rating. Anyway, gonna follow their recommendation.
Like any of the condensing water heaters most want the supply and exhaust the same side of the house for a even pressure.
 
Top
Hey, wait a minute.

This is awkward, but...

It looks like you're using an ad blocker. We get it, but (1) terrylove.com can't live without ads, and (2) ad blockers can cause issues with videos and comments. If you'd like to support the site, please allow ads.

If any particular ad is your REASON for blocking ads, please let us know. We might be able to do something about it. Thanks.
I've Disabled AdBlock    No Thanks