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 my mind, a forced air system is still a forced air system, so I'm not sure if there is any validity to that claim.  But I'm not an expert.  If you feel one way or another, please post, and substantiate your position with the facts.  Thanks!  I really look forward to everyone's response on this!

Views: 222

Reply to This

Replies to This Discussion

Hi Trish,

I cannot think of any reason why a ground source unit would provide any better IAQ than a conventional heat pump, with one exception. The ground source unit has no need to defrost. So there will be no reverse cycle cooling calls in the heating season. Consequently, the risk of "dirty sock syndrome" could be reduced. But the dirty sock microbe doesn't visit every household. So it seems a stretch to make much of an issue about it. 

On the other hand, if you are comparing ground source with a gas or oil fired forced air furnace, there are considerable differences. One that is seldom talked about is the compounds that can emit from heat exchangers. Some chemically sensitive individuals will have difficulty with the cutting oils and other chemicals evaporating in the air through the ductwork. It seems about 25% of the population are disposed to have such reactions (based primarily on hereidty). Of course any time you have a fire in the cave, it increases the risk of gas or oil leaks and combustion byproducts. CO will get you regardless of your DNA.

With very long run times the GS heat pump can clean the air better with  wet coil than most filters.  I took an air advice particulate counter to compare dry coils VS wet coil and wet coil was = to merv 8.    I hear that GS HP do not need yearly cleaning  I disagree.  the coil still get dirty, filter still need to get cleaned/replaced, parts still need to be replaced - motors relays get pitted, go down,  stick, drag.  I find most GS heat pumps still need 2 hr yr "tune up"  " cleaning"  I do not put gages on but will cheak amp draw, SP, temps, stat and operation.  Back to better IAQ  over all yes only with better air flow and better filter. 

RSS

Photos

Loading…
  • Add Photos
  • View All

Latest Activity

Profile IconJeremy Hess and Brian Coverstone joined Home Energy Pros
31 minutes ago
Eric Johnson posted a blog post

Reducing Energy Cost for Kayak

Fishing kayak becomes popular and one of the most attractive outdoor sport nowadays. There are many…See More
4 hours ago
Profile IconCharlie Ouellette, Karin Haerter and Juan joined Home Energy Pros
yesterday
Juan added a discussion to the group Energy Auditing Equipment for Sale, Trade or to Purchase
Thumbnail

Need Energy conservatory Blower door 3 + DG-700

Hello thanks for taking the time to read this post. I am currently looking for a blower door…See More
yesterday
Juan joined allen p tanner's group
Thumbnail

Energy Auditing Equipment for Sale, Trade or to Purchase

Discuss the pros and cons of the equipment you are interested in prior to purchase. Post equipment…See More
yesterday
Caoimhin P Connell replied to Rodney Fox's discussion Radon: Truth vs. Myth
"Good morning, Mr. Cullen – As I mentioned in another post – for the purposes under…"
yesterday
tedkidd replied to Rodney Fox's discussion Radon: Truth vs. Myth
"If putting the house under positive pressure using fresh air helps mitigate not just radon, but…"
yesterday
Rich Manning replied to Rodney Fox's discussion Radon: Truth vs. Myth
"Tell them the truth as you know it, and back it up with the facts!!"
yesterday

© 2016   Created by Lawrence Berkeley National Laboratory.   Powered by

Badges  |  Report an Issue  |  Terms of Service