Table of Contents
Loge
Loge is an AVR controller with one wire temperature sensor that will select the appropriate furnace for heat load balancing.
The following graph shows the heat required at different outside temperatures.
A small aux furnace, 125,000 BTU will be labeled H2. The normal furnace is H1. This graph indicates which algorithm is required to maximize matching the load to the furnace:
| Temperature | Heater | BTU required | BTU Avail |
| 50 | H2.5 | 65K | 62.5K |
| 46 | H2 | 70K | 125K |
| 40 | H2 | 106K | 125K |
| 35 | H2 | 128K | 125K |
| 30 | H1 | 149K | 180K |
| 25 | H1 | 170K | 180K |
| 20 | H1&H2.5 | 190K | 242K |
| 10 | H1&H2.5 | 234K | 242K |
Bench Clearance
Bench height currently 30“ above ground. Bottom of bench support is 24” above ground. Strategy is to hang the heater from the bench bottom blowing into the FanJet in front of the heater. The FanJet is also hanging from the bench bottom.
Implementation
LOGE was made operational on Dec 1, 2008. A pushbutton was mounted on the LOGE housing to “blink out” the outside and inside temperatures. The temp thresholds were set to 39 and 23 for furnace selection. Work was begun on Dec 2 to design a packet radio link to send the data and alarms.