Noah
Well Known Member
A good topic for the middle of winter... EMP AV offers several models of stainless firewall mounted heater boxes:
http://www.epm-avcorp.com/ssdiv.html
and Avery sells them too:
https://www.averytools.com/showcategory.aspx?categoryid=109&resetfilter=true
One model allows a scat tubing to be connected aft of the firewall, but requires a separate firewall penetration for the control cable.
The other model does not allow for any kind of scat tubing connection aft of the firewall, but does not require a second penetration for the control cable (the actuating lever is in the middle of the port). The vans standard heater box is similar to this unit.
At first blush, the first version seems nicer in that it allows scat tubing hookup, which would allow heat to be ported wherever you want, even to the eyeball vents on the panel. Of course, this would require a "Y" fitting at the heater box and mixing valves at the eyeball vents (to select between hot & cold).
So I'm debating how important it is to do this. I'm planning on some pretty high, pretty cold flights in my 7, so heat is important. I'm not clear on how effective the heat will be coming right from the base of the firewall with no additional porting around. Has anybody done any mixing of hot and cold air, particularly to the panel eyeball vents? For you guys flying in northern climes in the winter, is this necessary? Or is it better to leave the hottest air by your feet? Has anybody done the scat output? All of this extra stuff is weight and expense. Was it worth the extra firewall penetration & complexity? Any other input?
Thanks in advance,
http://www.epm-avcorp.com/ssdiv.html
and Avery sells them too:
https://www.averytools.com/showcategory.aspx?categoryid=109&resetfilter=true
One model allows a scat tubing to be connected aft of the firewall, but requires a separate firewall penetration for the control cable.
The other model does not allow for any kind of scat tubing connection aft of the firewall, but does not require a second penetration for the control cable (the actuating lever is in the middle of the port). The vans standard heater box is similar to this unit.
At first blush, the first version seems nicer in that it allows scat tubing hookup, which would allow heat to be ported wherever you want, even to the eyeball vents on the panel. Of course, this would require a "Y" fitting at the heater box and mixing valves at the eyeball vents (to select between hot & cold).
So I'm debating how important it is to do this. I'm planning on some pretty high, pretty cold flights in my 7, so heat is important. I'm not clear on how effective the heat will be coming right from the base of the firewall with no additional porting around. Has anybody done any mixing of hot and cold air, particularly to the panel eyeball vents? For you guys flying in northern climes in the winter, is this necessary? Or is it better to leave the hottest air by your feet? Has anybody done the scat output? All of this extra stuff is weight and expense. Was it worth the extra firewall penetration & complexity? Any other input?
Thanks in advance,
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