A7 AirTap install (ASHP hot water heater)

Xringer · 03-31-14, 09:05 PM

I've been looking at the cold air output vent..

The output vent is located on the top, surrounded by pre-drilled holes.
Those holes are used for mounting a duct, so that cold air can be fed into another area.

I'm wondering, if the designer didn't want to duct the air anywhere else,
would the front panel have a much larger vent?

Plan A.
What I'm thinking about is cutting a large hole in that big face panel
and covering it with a guard wire to protect the HX from fingers etc.

Plan B, would be to cut some round holes and install some muffin fans on the front panel, to increase the air flow..

Would any of this help speed up recovery time?

Edit:
One experiment I conducted on that vent, was to tape a long flat rectangle of CoroPlas, a 'door' or hatch on top of the vent.
The idea was to gravity-close the vent when the A7 was off..
The little flap-hatch would be pushed up (by air pressure) when the A7 was running,
and then drop down and close the vent when the A7 was off.

The problem that I saw, was very light weight of the flap-hatch
was too heavy for the air flow to push it up out of the way..
I'm thinking wow, this is very low air flow. It would only open about 1/2".

So, maybe an air-pulling fan out front??

03-31-14, 09:05 PM	#11
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 114 Thanked 250 Times in 230 Posts	Is my vent too tiny? I've been looking at the cold air output vent.. The output vent is located on the top, surrounded by pre-drilled holes. Those holes are used for mounting a duct, so that cold air can be fed into another area. I'm wondering, if the designer didn't want to duct the air anywhere else, would the front panel have a much larger vent? Plan A. What I'm thinking about is cutting a large hole in that big face panel and covering it with a guard wire to protect the HX from fingers etc. Plan B, would be to cut some round holes and install some muffin fans on the front panel, to increase the air flow.. Would any of this help speed up recovery time? Edit: One experiment I conducted on that vent, was to tape a long flat rectangle of CoroPlas, a 'door' or hatch on top of the vent. The idea was to gravity-close the vent when the A7 was off.. The little flap-hatch would be pushed up (by air pressure) when the A7 was running, and then drop down and close the vent when the A7 was off. The problem that I saw, was very light weight of the flap-hatch was too heavy for the air flow to push it up out of the way.. I'm thinking wow, this is very low air flow. It would only open about 1/2". So, maybe an air-pulling fan out front?? __________________ My hobby is installing & trying to repair mini-splits EPA 608 Type 1 Technician Certification ~ 5 lbs or less.. Last edited by Xringer; 03-31-14 at 09:17 PM..