Heatpump HRV. - Page 2

Xringer · 02-18-17, 07:32 PM

"During winter I would disable the HRV. The utility room containing the HRV would get so cold."

Why not just add some kind of auxiliary heating to the utility room, to overcome the losses?

Maybe solar of some type?
DIY Solar Air Heating Collectors: Pop Can vs Screen Absorbers

At least you could run the HRV when it was sunny out..

I use two radon blowers to move warm attic air into my 10C basement,
when the conditions are right.

randen · 02-19-17, 08:02 AM

Xringer

I a lot of solar hot water panels. That this year with all the cloud cover resulted in a nil investment to my heating requirement

The cold utility room was caused by air exchange unit was not compensating for the hot air being pumped out of the house. The 21 Deg. C. air was leaving and the incoming fresh air might have been lucky to enter the plenum at 0 Deg. C. As you may realize this would not be very desirable condition.

This Nilan or airxsolution looks like the thing I was thinking to build. We'll have to see how many $$$ one would need to exchange for this device. "You must always pick your battle" Buy or Build

Randen

Xringer · 02-19-17, 08:59 AM

If it's 0 deg C, into the plenum, I wonder if frost is forming.?. Messing up the air flow.?.

randen · 02-19-17, 05:03 PM

Xringer

Imagine -21 Deg. C. air flowing through the cloraplast heat exchanger and 21 Deg. room air exiting through the same HX, even if its 100% efficient the air entering could only be 0 Deg. Burrr.

The result is that it really cools the house and the GSHPs are really working hard. We definitely need something better with regards to a HRV.

Randen

Xringer · 02-19-17, 05:53 PM

Wow.. That is a problem. Nothing like that around here.. The Atlantic keeps it mild.

Aux heating would have to be considerable. I would just shut it down when it
started to cool the room. Have it back turn on when the outside air warmed up.

I don't let my attic hot air system run unless I can get some heat gain in the basement
and not pump in any moist air..

AC_Hacker · 02-20-17, 01:10 PM

Have you let these guys talk you out of even trying an active HRV?

These things already exist commercially.

I think that you should build at least a very small model and take some measurements.

-AC

randen · 02-20-17, 02:45 PM

AC_hacker

You know I like a challenge but lets see what they cost. There is a company that makes them in Quebec Minotair. 7 & 12 kbtu.

Randen

creeky · 02-21-17, 06:51 PM

Did you get a price on the Minotair?

We have an HRV that is not working very well. This looks like a possible fix.
Too bad they don't carry the Nilan anymore.

randen · 02-21-17, 07:14 PM

Well I did get a quote and was shocked. We know a mini split is about the same machine and they are priced around $1000.00 for a 12kbtu unit. Not 2000 not 3000 and no not 4000 but 4500 plus taxes and shipping WOW.
Randen

creeky · 02-21-17, 08:04 PM

ack. kak. haroom. Oh well. One solution down.

Perhaps they could take the design to China for mfct.

02-18-17, 07:32 PM	#11
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 114 Thanked 250 Times in 230 Posts	"During winter I would disable the HRV. The utility room containing the HRV would get so cold." Why not just add some kind of auxiliary heating to the utility room, to overcome the losses? Maybe solar of some type? DIY Solar Air Heating Collectors: Pop Can vs Screen Absorbers At least you could run the HRV when it was sunny out.. I use two radon blowers to move warm attic air into my 10C basement, when the conditions are right. __________________ My hobby is installing & trying to repair mini-splits EPA 608 Type 1 Technician Certification ~ 5 lbs or less..

02-19-17, 08:59 AM	#13
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 114 Thanked 250 Times in 230 Posts	If it's 0 deg C, into the plenum, I wonder if frost is forming.?. Messing up the air flow.?. __________________ My hobby is installing & trying to repair mini-splits EPA 608 Type 1 Technician Certification ~ 5 lbs or less..

02-19-17, 05:53 PM	#15
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 114 Thanked 250 Times in 230 Posts	Wow.. That is a problem. Nothing like that around here.. The Atlantic keeps it mild. Aux heating would have to be considerable. I would just shut it down when it started to cool the room. Have it back turn on when the outside air warmed up. I don't let my attic hot air system run unless I can get some heat gain in the basement and not pump in any moist air.. __________________ My hobby is installing & trying to repair mini-splits EPA 608 Type 1 Technician Certification ~ 5 lbs or less..

02-20-17, 01:10 PM	#16
AC_Hacker Supreme EcoRenovator Join Date: Mar 2009 Location: Portland, OR Posts: 4,004 Thanks: 303 Thanked 723 Times in 534 Posts	Have you let these guys talk you out of even trying an active HRV? These things already exist commercially. I think that you should build at least a very small model and take some measurements. -AC __________________ I'm not an HVAC technician. In fact, I'm barely even a hacker...

02-21-17, 06:51 PM	#18
creeky Journeyman EcoRenovator Join Date: Jun 2011 Location: a field somewhere Posts: 304 Thanks: 64 Thanked 44 Times in 31 Posts	Did you get a price on the Minotair? We have an HRV that is not working very well. This looks like a possible fix. Too bad they don't carry the Nilan anymore. __________________ Current projects Chevy Volt battery pack conversion To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. Blog that is down right now but will return To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. Business where I sell solar stuff [url]https://www.bobolinksolar.com

02-19-17, 08:02 AM	#12
randen Uber EcoRenovator Join Date: Apr 2011 Location: Strathroy Ontario Canada Posts: 657 Thanks: 9 Thanked 191 Times in 129 Posts	Xringer I a lot of solar hot water panels. That this year with all the cloud cover resulted in a nil investment to my heating requirement The cold utility room was caused by air exchange unit was not compensating for the hot air being pumped out of the house. The 21 Deg. C. air was leaving and the incoming fresh air might have been lucky to enter the plenum at 0 Deg. C. As you may realize this would not be very desirable condition. This Nilan or airxsolution looks like the thing I was thinking to build. We'll have to see how many $$$ one would need to exchange for this device. "You must always pick your battle" Buy or Build Randen

02-19-17, 05:03 PM	#14
randen Uber EcoRenovator Join Date: Apr 2011 Location: Strathroy Ontario Canada Posts: 657 Thanks: 9 Thanked 191 Times in 129 Posts	Xringer Imagine -21 Deg. C. air flowing through the cloraplast heat exchanger and 21 Deg. room air exiting through the same HX, even if its 100% efficient the air entering could only be 0 Deg. Burrr. The result is that it really cools the house and the GSHPs are really working hard. We definitely need something better with regards to a HRV. Randen

02-20-17, 02:45 PM	#17
randen Uber EcoRenovator Join Date: Apr 2011 Location: Strathroy Ontario Canada Posts: 657 Thanks: 9 Thanked 191 Times in 129 Posts	AC_hacker You know I like a challenge but lets see what they cost. There is a company that makes them in Quebec Minotair. 7 & 12 kbtu. Randen

02-21-17, 07:14 PM	#19
randen Uber EcoRenovator Join Date: Apr 2011 Location: Strathroy Ontario Canada Posts: 657 Thanks: 9 Thanked 191 Times in 129 Posts	Well I did get a quote and was shocked. We know a mini split is about the same machine and they are priced around $1000.00 for a 12kbtu unit. Not 2000 not 3000 and no not 4000 but 4500 plus taxes and shipping WOW. Randen

02-21-17, 08:04 PM	#20
creeky Journeyman EcoRenovator Join Date: Jun 2011 Location: a field somewhere Posts: 304 Thanks: 64 Thanked 44 Times in 31 Posts	ack. kak. haroom. Oh well. One solution down. Perhaps they could take the design to China for mfct. __________________ Current projects Chevy Volt battery pack conversion To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. Blog that is down right now but will return To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. Business where I sell solar stuff [url]https://www.bobolinksolar.com

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