Presented to: Douglas A. King Builders, Inc.
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7 Neff Drive
Foxborough, MA 02035
Project Date: 3/29-30/21
Contact: Tony Fernandes, Facility Mgr.
Technician Reporting: John Cox ASCS, VSMR
Table of Contents:
The HVAC system and network of air ducts were visually inspected. The information in this report is private and shared only with the assigned designees of Douglas A. King Builders, Inc. (DAK). Interpretation of the data collected in this assessment is meant to inform DAK as to the condition of their HVAC system.
The work area consisted of entire living space of the first and second floors, including basement and attic. The residence had two air handlers, one in the basement and one in the attic (see specifications charts 1 and 2 below). There was a total 21 of registers, including returns. 550 feet of flex duct was cleaned as was 125 feet of main trunk. Multiple access points were cut to allow for manual cleaning and to attach a negative air machine. Upon departure all door handles, railings, light switches and other touchable surfaces were sanitized.
Containment Special attention was paid to full containment. Furniture, carpets, electronics and curtains throughout the space were covered with .3 mil plastic to prevent cross-contamination. Floor coverings and protective shoe-booties were used for an added layer of protection and sanitary awareness.
Vent & Registers: Twenty-one (21) vents and registers were removed in order to accessed ductwork for manual cleaning. Registers were summarily cleaned and replaced in a pre-recorded order.
Main Trunk: AHU 1 (basement) supply trunk was found to be sealed and was cleared of moderate dust. AHU 2 (attic) also had moderate dust. both were free of moisture or biological contaminants.
Ductwork: The ductwork was was sagging in many areas throughout the basement which was preventing proper air flow. This was remedied with the use strapping and braces across ceiling joists. A moderate level of dust. Multiple access points were used in both the supply and return ductwork to attach a Nikro 5,000 CFM HEPA negative air machine. Interior of ductwork was cleaned using mechanically rotating brushes and a 20' flexible cable with a 8" nylon brush (whip). Four bath vents were inspected and cleaned. System remains at 100% efficiency.
Air Handlers: Two forced hot air furnaces were inspected, cataloged and cleaned. The systems were in good working order with AHU 1 (basement) wet to the touch below blower motor and rust inside the cabinet. (see slide-deck 1) No biological growth to be reported inside the systems. AHU 2 (attic) had humidity and moisture levels well within accepted tolerances.
Both outside condenser units were congested with leaves and bark mulch. Both were dismantled and cleaned with compressed air and
aluminum fins were combed and coil cleaner used.
On-site Repairs: Eight inch supply-side flex duct was repaired in the attic and one other connection reinforced. Front foyer register was found disconnected and missing its boot which connects the flex duct in the basement. All was repaired back to full function. Four sheet-metal liners were installed in kitchen air return. This was predominantly cosmetic as the register was in very poor condition and in plain view. See before after slider below.
Area of concern: AHU 1 (basement) was wet below the blower motor and there was a moderate amount of rust. The condenser pump was full, and it was not determined if the pump was broken. (see slide-deck 1)
Click to enlarge
although drain line has been modified to expel outside.