If you enjoy the articles in this web site, please consider supporting it by ordering the items you want by clicking on the recommended Amazon product links in the articles, which will just add those products to your Amazon shopping cart.

The product links contain a referral tag that allows me to earn a small commission on the sale of the products from Amazon.  This doesn't cost you anything extra but will help to offset the cost of running this web site and writing new articles.

Article Index

As you can see in the following table, the E-Classic 1400 furnace holds almost 10 times more wood, has a higher furnace efficiency, and has a higher rated output over 8 hours than the BIS Ultra fireplace.  It has certainly been easier to load up the outdoor furnace once a day (or often twice when it's cold).  In practice, with our well-insulated house, we typically use the fireplace when it's above freezing outside because the fireplace has enough capacity to keep the house warm.  Using the e-Classic 1400 takes longer because of the time it takes to bring all of the furnace's water up to operating temperature and this light load tends to cause creosote build-up. Besides, a crackling fire in the fireplace is nice in the winter.

Although a 32" long log can fit into the firebox, the maximum log length of wood splitter will determine actual log lengths.  The dealer who sold me the E-Classic 1400 recommended 24" logs and this seems to be fairly common size for wood splitters too.

Specification  E-Classic 1400 BIS Ultra
Door 18.5" x 18.5" 25" x 14" (glass area)
Firebox 32" L x 24" W x 32.5" H
14.44 ft³ volume
25"W x 13.5"D x 13"H (nominal)
18"W x 12"D x 12"H (practical)
2.5 ft³ (nominal) / 1.5 ft³ (practical)
18"-19" log
Weight 2,085 lbs. 402 lbs.
Water Capacity 195 Gallons N/A
8-Hr Output Rating 107,459 BTU/hr †
(based on dry oak)
12-Hr Output Rating 72,000 BTU/hr  
Maximum Heat Output Capacity 209,316 BTU/hr †
(based on dry oak)
up to 60,000 BTU/hr
up to 8 hrs burn time
EPA Rating   4.8 grams/hr
Furnace Efficiency over 84% 75.2%
Note † Based on EPA qualifying test  tapered firebox is 18" wide
at the back