Product Selections - Y8150 Fresh Air Ventilation Control System

50-9123 JB 10/05
Printed in the USA
© Honeywell 2005 All rights reserved
From Research Products Owners Manual available from http://www.aprilaire.com
This table shows the mixed air temperature effect
between 10º to -20ºF is limited to < 2.0ºF.
Outside Air Volume 100 cfm
Return Air Temp 66ºF
Return Air Volume 1500 cfm
Outside Air Temp Mixed Air Temp
10 62.27
8 62.13
6 62.00
4 61.87
2 61.73
0 61.60
-2 61.47
-4 61.33
-6 61.20
-8 61.07
-10 60.93
-12 60.80
-14 60.67
-16 60.53
-18 60.40
-20 60.27
This table shows the mixed air temperature effect
between 99º to 115ºF is limited to < 1.5ºF.
Outside Air Volume 100 cfm
Return Air Temp 77ºF
Return Air Volume 1500 cfm
Outside Air Temp Mixed Air Temp
85 77.53
87 77.67
89 77.80
91 77.93
93 78.07
95 78.20
97 78.33
99 78.47
101 78.60
103 78.73
105 78.87
107 79.00
109 79.13
111 79.27
113 79.40
115 79.53
“If the outdoor air temperature is below 0°F or above 100°F,
the motorized normally-closed damper to the outside will not be opened.”
The following tables represent the limited effect of disabling outdoor air ventilation over 100ºF and under 0ºF,
as opposed to continuing to ventilate in order to meet the ASHRAE 62 standard, the legal standard of care in the
industry. The mixed air temperature is the air provided to the air-handling unit to condition and distribute to the home.
Formula for calculating mixed air temperature is based on:
* 100% =
Return Air Temp. – Supply Air Temp.
Return Air Temp. – Outdoor Air Temp.
% Outdoor Air =
Outdoor Air Volume (cfm)
Return Air Volume (cfm)
50-9123 Y8150 FrshAir 10/12/05 12:27 PM Page 2