Why have residential combustion safety tests changed from testing under worst-case conditions to those at a level closer to common household appliance operation?
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For a residence with three natural draft Category I vented appliances with natural drafts of 120,000 Btu/hr, 150,000 Btu/hr, and 100,000 Btu/hr, all sharing an indoor airspace with an ACH of 0.5 with a ceiling height of 8 feet, how much indoor surface area is required for these appliances to be...
When assessing a combustion appliance for spillage, how long should the main burner be in operation before making the assessment? 3 minutes 5 minutes 10 minutes 15 minutes Which of the following does not apply to the screening protocol used to assess combustion appliances that use indoor air? Any...
Which conditions for residences do not allow retrofit work to proceed without extensive combustion safety diagnostics or performance-based protocols, similar to those that qualify for appliance zone isolation? All combustion appliances are depressurization resistant. The residence is extremely leaky...
At what concentrations of indoor air ambient CO should a qualified professional be contacted to address the CO contamination due to a permanently installed appliance? Select all that apply. At CO concentrations of 9 ppm to 35 ppm. At CO concentrations of 36 ppm to 69 ppm. At CO concentrations of 70...
Answer the following questions about remediation: When can remediation be implemented in the process of evaluating combustion safety? In the event of combustion safety failure at test-in or test-out, under which circumstance can remediation measures be implemented before needing to contact a trained...
Level 1 of the Combustion Safety Module, which focuses on: What is combustion safety, and what are three good practices to ensure combustion safety for gas-fired natural draft appliances? Knowing the widely adopted fuel gas codes Defining key combustion safety terms as well as knowing the different...
Level 2 of the Combustion Safety module, which focuses on: Understanding the main approaches to evaluating combustion safety Understanding the harmful effects of CO spillage and what they can be done to prevent backdrafting of CO.
The safe operation of space and water heating combustion appliances is critical to occupant health and safety. As we review the factors contributing to appliance vulnerability, we will demonstrate the definitive test used to assess safe operation and share how to identify and possibly address the...
1. According to the NREL model, what percentage of the energy used in HVAC systems is estimated to be attributed to installation-related faults, leading to a substantial financial burden on utility bill payers? 2. Identify one symptom of insufficient airflow in an HVAC system and explain its...
1. What is the main goal of residential HVAC commissioning?
1. Name one organization that establishes standards or guidance for residential HVAC commissioning.
1. You're evaluating an older system with complaints of inconsistent temperatures. What three tests would be your priority, and why? 2. A client is unsure why their energy bills remain high after a newer, efficient HVAC was installed. Without major re-commissioning, what test(s) could uncover likely...
1. Describe a traditional method for measuring refrigerant charge vs. how a smart diagnostic tool streamlines the process.
Details common faults and concerns to look out for when commissioning HVAC systems. Also includes information on industry organizations and standards that describe residential HVAC commissioning.
Explains the steps and procedures needed to commission a HVAC system.
Over half of the indoor air quality problems result from ____________________? 1. Increasing toxicity of mold 2. Inadequate ventilation 3. Excess dust due to insulation 4. Low oxygen levels.
These lecture notes provide information about common signs of moisture problems in buildings.
Evidence of moisture problems in a building can include: Damp feeling, odors; mold and mildew; peeling paint and sweating pipes Shrinking, warping, rotting wood; drawers that stick Condensation, frost and ice dams on windows Discoloration corrosion, oxidation, or rust of building materials All of...
In this HVAC Training Video, I Show the Different Types of Refrigerant Measurement Tools such as Digital and Compound Manifold Sets, Test Gauges, and Wireless Probes. Supervision is needed by a licensed HVACR Tech while performing tasks as Experience and Apprenticeship garners Wisdom and Safety.