All installations and services must be performed by qualified service personnel.

4.If the furnace is used in connection with an air conditioning evaporator coil, the furnace must be installed parallel with or on the upstream side of the coil, to prevent condensation in the heat exchanger. If the evaporator coil is installed with a parallel flow arrangement, dampers or other means to control flow of air should be installed to prevent chilled air from entering the furnace. If such a device is manually operated, it must be equipped with a means to prevent operation of either the furnace or air conditioner unless it is in the full heat or cool position.

We recommend that the outlet duct be equipped with a removable access panel to allow for visual inspection of the heat exchanger to check for leakage or to allow for insertion of a probe sampler in the air stream. This removable access cover should be attached to ensure there is no air leakage.

5.The duct system shall be sized for the maximum CFM requirement of the installation whether it is for heating or cooling. Two common rules for heating and cooling follow:

A. 400 CFM (1200 BTU's) per ton of cooling is required.

B. 14 CFM of heating per 1000 BTU's of furnace output based on its steady state efficiency and a 55° to 85° temperature rise.

EXAMPLE: Heating output of a furnace is 100,000 BTU/HR 100,000 BTU x 14 cfm = 1400 CFM

1000 BTU

Air conditioning installed is 4 tons x 400 CFM = 1600 CFM or 48,000 BTU’s. NOTE: The duct system must be sized for the larger CFM requirement for cooling. If only 3 tons 36,000 BTUs of cooling x 400 CFM = 1200 CFM was installed, the duct would have to be sized for the 1400 Cfm heating requirement.

Figure 18A

All trunk lines, take-offs, registers and grill-free areas must be figured when determining the air handling capacity of a duct system. One can obtain the necessary duct system size by utilizing the chart below. (For example, see Figure 18A.) Use a supplier’s catalog for proper sizing of outlet and return air registers to insure that the register will meet the CFM requirements of the run to which it is connected.

The main trunk lines, take offs, registers and grills of the supply return air duct system must have an adequate square inch area to move the desired CFM in order to achieve proper movement. The following chart shows the CFM air handling capability based on a 0.1” SP loss in the supply duct system. The total external static pressure should not exceed .2 inches water column.

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Thermo Products CHB1-75N, CHB1-125N, CHB1-100N, CBD1-75N, CBD1-100N, CBD1-125N, CBD1-50N, CHB1-50N operation manual
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CHB1-50N, CBD1-50N, CBD1-125N, CBD1-100N, CBD1-75N specifications

Thermo Products offers a range of high-performance heating and cooling solutions tailored to meet the demands of both residential and commercial applications. Among their innovative offerings are the CHB1-50N, CBD1-75N, CHB1-100N, CHB1-125N, and CBD1-100N models, which are designed to provide efficient temperature control while maximizing energy savings.

The CHB1 series, including the CHB1-50N, CHB1-100N, and CHB1-125N, features advanced heating technologies that allow for rapid heating response times. These units are equipped with high-efficiency heat exchangers that ensure optimal heat transfer with minimal energy consumption. A key characteristic of these models is their ability to operate quietly, making them ideal for settings where noise reduction is a priority.

In comparison, the CBD1 series, specifically the CBD1-75N and CBD1-100N, focuses on cooling capabilities that are equally impressive. These units utilize state-of-the-art cooling compressors designed to provide powerful cooling while maintaining low operational costs. The CBD1 models incorporate environmentally friendly refrigerants, ensuring compliance with the latest environmental regulations, which appeals to environmentally conscious customers.

All models in this lineup are designed with user friendliness in mind, featuring intuitive digital controls that allow for precise temperature adjustments. This makes them suitable for end users with varying levels of technical expertise. Additionally, the units support smart home integration, enabling remote monitoring and control via mobile apps, which enhances comfort and convenience for users.

Durability is another hallmark of Thermo Products. The robust construction of both the CHB1 and CBD1 series units ensures resilience against harsh weather conditions and prolonged usage. Furthermore, they come equipped with advanced safety features, including over-temperature protection and automatic shut-off mechanisms, which provide peace of mind for consumers.

In summary, the Thermo Products CHB1-50N, CBD1-75N, CHB1-100N, CHB1-125N, and CBD1-100N models represent a comprehensive solution for effective heating and cooling needs. With their blend of efficiency, innovative technologies, user-friendly design, and durability, these products are positioned to deliver exceptional value and performance in a variety of environments.
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