M-Series Technical Manual
103
Cambridge Air Solutions
ANSI/ASHRAE/IESNA STANDARD 90.1
Overview
Energy efficient, Genuine Cambridge
®
direct
gas-fired heating equipment can comply with the
requirements of ANSI/ASHRAE/IESNA Standard
90.1. Compliance is shown on the Cambridge heater
nameplate.
Purpose of ASHRAE Standard 90.1
ASHRAE Standard 90.1 provides minimum
requirements for the energy efficient design and
construction of new commercial buildings in the
United States. The standard covers the entire
building, setting minimum equipment efficiency
levels for components that may be used, rather than
setting standards for component manufacturing.
The provisions of this standard do not apply to
single family houses, low rise residential buildings
and buildings (or portions of buildings) that use
energy primarily for industrial, manufacturing or
commercial processes.
Compliance Requirements:
The following are required for Cambridge heaters to
comply with Standard 90.1:
• Controls
(Section 6.4.3)
Total airflow of all heaters less than 10,000
cfm - The Cambridge Air Solutions Temperature
Setback System (TSS) will meet the standard. A
properly configured building DDC system with
the necessary programming for zone control,
automatic shutdown and setback can also meet
the standard.
Total airflow of all heaters exceeds 10,000 cfm
- The Cambridge Air Solutions Temperature
Setback System (TSS) with optimum start control
will meet the standard. A properly configured
building DDC system with the necessary
programming for zone control, automatic
shutdown, setback and optimum start can also
meet the standard.
Heaters intended to operate continuously - No
special controls are required to meet the standard.
• Damper
(Section 6.4.3.4.3)
A damper is required on each heater. The
Cambridge Air Solutions Motorized Discharge
Damper (MDD) will meet the standard.
• Labeling
(Section 6.4.1.5.1)
The heater must be labeled to indicate that it
complies with the requirements of the standard.
The nameplate of Cambridge heaters includes the
required labeling.
• Efficiency
(Section 6.4.1.3)
Direct gas-fired heating equipment has no
minimum efficiency requirement. However
Cambridge Air Solutions certifies that its
equipment has a 100% combustion efficiency
(Ec) and a 92% thermal efficiency (Et).
