Engineering whole home iaq system installation for Inglewood homes in CEC Climate Zone 8
The plan should show whether a ductless zone, duct repair, or full heat pump install gives the cleanest result. That number is the local stress test the whole home iaq system installation scope has to absorb. heat pump replacement, duct correction, electrical review, and rebate documentation where eligible The audit measures static pressure, supply CFM, return free area, and combustion safety on any gas appliance staying in the system; the report names which line item is driving the cost spread on the proposal.
ASHRAE 62.2-2022 mechanical ventilation rate formula: Qfan = 0.03 × Afloor + 7.5 × (Nbr + 1) CFM. An 1,800 sq ft, 3-bedroom Los Angeles home calculates to 0.03×1800 + 7.5×4 = 54 + 30 = 84 CFM continuous outdoor air. ASHRAE 62.2 Table 5.1 spot exhaust: kitchen 100 CFM intermittent or 5 ACH continuous; bath 50 CFM intermittent or 20 CFM continuous.
Average summer high near 80°F with winter low around 50°F at an elevation of 125 ft and roughly 5 miles inland. CEC Climate Zone 8. The cooling design temperature for Manual J calculations runs about 86°F, with typical Manual J load landing in the 400-600 sq ft per ton band. Electric service in Inglewood is SCE; gas is SoCalGas. Equipment selection should match the rebate path that utility offers when the program applies on the day the contract is signed. The engineer signs the report; the homeowner sees the signature before the equipment order is placed.