Hearthstone Quality Home Heating Products, Inc
WAITSFIELD Model 8770
5
Specifications
Testing Agency:
Intertek Testing Services NA, Inc.
(ITS)
Listed:
Direct Vent Gas Heater
Model:
Waitsfield Model 8770
Tested to:
ANSI Z21.88b – 2014/CSA 2.33b - 2014
Certified for Canada, CSA P.4.1
Approved for Mobile Home Installation
Certified for use by:
Board of State Examiners of Plumbers and Gasfitters
100 Cambridge Street, Room 1511
Boston, Massachusetts 02202
Manufactured and Warranted by:
Hearthstone Quality Home Heating Products, Inc.
317 Stafford Ave.
Morrisville, VT 05661-8695, USA
www.hearthstonestoves.com
Waitsfield DX Dimensions
Specification
NG
LP
Input rating (Btu/hr) 0-2000 ft
37,000
37,000
Input rating (Btu/hr) 2000-4500 ft
37,000*
37,000**
Orifice size DMS 0-2000 ft
45/45
53(f)/57(r)
Orifice size DMS 2000-4500 ft
45/45
53(f)/57(r)
Man. press.-LO setting (in.w.c./kPa)
2.7/0.67
10.7/2.67***
Man. press.-HI setting (in.w.c./kPa)
3.4/0.87
10.4/2.59*****
Minimum Inlet press.(in.w.c./kPa)
5.0/1.25
12.0/2.99
Minimum input rating (Btu/hr)
18,000
16,000
*Valve outlet pressure increased to 4.7 in.w.c. ** Valve outlet pressure increased to 12.6 in.w.c.
***Pressure measured with only front burner engaged. ****Pressure measured with both burners engaged.