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Home My WebLink AboutINSPECTION Radon Permit 661 N Morgan St 2024-0-07INSPECTION CARD Estes Park 170 MacGregor Ave Suite 230, Estes Park, CO 80517 POST THIS CARD IN A SAFE CONSPICUOUS LOCATION. PLEASE DO NOT REMOVE THIS NOTICE UNTIL ALL REQUIRED INSPECTIONS ARE MADE AND SIGNED OFF BY THE APPROPRIATE AUTHORITY AND THE BUILDING IS APPROVED FOR OCCUPANCY. STAMPED APPROVED PLANS MUST BE AVAILABLE ON THE JOBSITE. APPLICATION NO.:24-EP-00067 TYPE:Radon Permit ISSUED DATE:03/12/2024 EXPIRATION DATE:12/30/2024 PROJECT ADDRESS:661 N. Morgan St., Estes park, CO 80517 PARCEL NO.: OWNER:Caroline S. Lovelace CONTRACTOR: Radon Home Measurement and Mitigation CONTRACTOR PHONE:(970) 416-0196 DESCRIPTION OF WORK: Radon Home Measurement and Mitigation (“RHMM”) Fort Collins, (970) 416-0196 Dr. Leo Moorman AARST-NRPP certified /NRPP-AARST standards and guidelines / State of Colorado Licensed www.radon-mitigation.org SUMMARY Reference Proposal #: C240303A Agent: Caroline S Lovelace Property address: 661 N Morgan Street, Estes Park CO 80517 · Where indicated the warranty by RHMM is that the living room and all rooms above the basement will have a radon concentration of less than 4.0 pCi/L during at least 13 consecutive months after the mitigation, and is expected to stay at that low level as long as the proposed system is operating and maintained per manufacturer’s information, and radon entry from the mountain underneath the building entering the building envelope does not dramatically change by independent exterior conditions. · After mitigation, short term testing in the living room with two simultaneous devices or a single continuous radon monitor will be conducted, and is included in this estimate. · Homes with inaccessible crawl spaces cannot be mitigated with standard Activated Sub Membrane radon mitigation systems. One of the recognized alternate systems to bring the radon concentration in an existing home down to meet desired guidelines is a Heating Recovery and Ventilating system (HRV), provided that (1) it is independent of the furnace, (2) operates all the time, (3) has a balanced system with air flow that is large enough to dilute the radon concentration in the indoor air, and (4) has an original concentration of radon in the air no higher than a maximum of typically 15 pCi/L. Additional characteristics of such systems are that they (A) remove radon directly from the air inside the house instead of from the crawl space underneath the house, and (B) take fresh air in from the exterior and discharge indoor stale air (with the same low radon concentration as is the indoor air of the house) to the exterior. These exterior intake and discharge have to be at least 10 feet apart from each other on the outside of the building, and are allowed to be installed above grade level, similar to regular HRV systems that bring fresh air into the house that are not installed for the purpose of radon mitigation. ACTIVE INTERIOR RADON MITIGATION SYSTEM USING HEAT RECOVERY VENTILATION SYSTEM ON THE INTERIOR AIR OF THE HOME. Material and installation of interior active radon mitigation systems in the form of a Heat Recovery Ventilation (HRV) system that will be designed to create dilution of the radon concentration in the inside air in the living room and all other rooms of the house by the method of exchanging the inside air with outside air while recovering energy to bring radon levels below 4.0 pCi/L, under closed-building conditions in these rooms. It will do so while recovering most of the energy (heat) from the higher energy (heat) stream through the HRV to the lower energy (heat) stream. In the winter this will keep the conditioned space warmer, and in summer it will keep the conditioned space cooler compared to direct air exchange. The HRV-system will be installed in the basement next to the furnace but will operate independent of the furnace in the sense that the ducts will not be tied in with the furnace ducts. It will have four ducts routed to appropriate locations. All ducting will be with insulated flexible duct of nominal 6” interior diameter. Two ducts will be routed from the HRV to the exterior through the basement, and two ducts to the interior of the living room via the crawl space underneath the house. The exterior intake of fresh outside air will be through the North side rim joist on the side of the basement door. The exterior discharge of radon diluted air, which is essentially the indoor air in the house, will be on the other side of the basement door, provided that exterior intake and discharge are minimally 10 feet apart. The HRV will have a standard hanging brace screwed into two wooden 2x4’s that will be anchored against the existing south concrete wall of the basement. The interior supply duct will be routed from the HRV to a floor registers in the Northeast corner of Page 1 of 2 To request an inspection: the living room. The interior discharge of fresh air into the living room will be connected to a floor register in the Northwest corner of the living room. The purpose of the duct system is that one combination of ducts will bring the fresh outside air via the HRV into the living room and the other will take the radon laden air out of the living room via the HRV to the outside. The designed set-up creates a slightly higher pressure at the interior discharge and a slight vacuum at the interior intake. Proper balancing of this system to verify flow is established by design through the HRV and is essential for its proper operation. The principle of operation of this type of system will be different from the more common approach of Active Soil Depressurization type of radon mitigation systems as it works by diluting the radon in the inside air while reducing the energy loss of the interior, conditioned space. The HRV system will need a normal 120 V outlet within 5 feet and is specified to draw less than 2 Amperes of current at the location where installed. An outlet will be used to power the HRV. Energy costs will be similar to the operation of any electronic device rated at 240 Watt (2 Amp), due to continuous working of fans in the HRV. In addition, the heat recovery process efficiency for the air exchange process is specified by the manufacturer during cold weather to be an Adjusted Sensible Efficiency at 32 degrees F of 83%, and at -13 degrees F of 67%. The HRV device will have the ECO-Touch programmable controller to allow the system to be switched to any of the three capable operating speeds, and it will have a quiet internal recirculatory defrost cycle that does not depressurize the house during cold weather conditions (23 degrees F and lower). During this defrost sequence, the supply (exterior intake) blower shuts down and the exhaust blower continues to ventilate for a pre-set time. The unit then returns to normal operation and continues its HRV Vent cycle. The unit has washable electrostatic filters and a counterflow heat exchanger built from a thermoform polymer plates with a manufacturer limited lifetime warranty, and a standard added MERC-13 HEPA filter. From the HRV manufacturer, a limited lifetime warranty exists on the counterflow exchanger, 7 years on motors and 5 years on parts. The estimate for testing and installation work duration is 2.5 working days for testing in our shop and installation on location. The duct work installation can be started typically within 10 days after this document is signed and received in our office. A 120 V outlet of appropriate capacity is to be installed within 5 feet of the location of the HRV by a State licensed electrician in order to plug it in. The placement of the outlet is not included in the total estimate. The HRV device cannot operate more than 30 days from a temporary hook up/extension cord. The State licensed electrician is not included in the Total Estimate. The HRV is recommended to be installed within the conditioned envelope of the house for its rated efficiency for energy exchange. If the crawlspace temperature varies too far from conditioned envelope temperatures it is recommended that the area be closed off from the rest of the crawl space with wood or drywall (not included in the Total Estimate). A simultaneous two-chamber or Continuous Radon Monitor short term EPA radon test or under closed house conditions inside in the living room will be performed after completion of installation to determine the post-mitigation radon level. The estimated duration for the work is 1 day of preparatory work including hook up and testing of the ECO-Touch controller in Fort Collins, and 1.5 days work in Estes Park. In addition a two-day radon test in the living room of the house will be conducted following EPA guidelines. TOTAL ESTIMATED HRV-RADON REDUCTION INSTALLED, INCLUDING POST-MITIGATION RADON TEST $ 4,052.- ---------- TOTAL ESTIMATE: $ 4,052.- EXCLUSIONS: A)Outlet to be installed by a local licensed electrician consistent with electrical Code requirements. B)If the seasonal variations of the temperature of crawl space are not appropriate for installation of an HRV (which is recommended to be located within the conditioned envelope of the house) an insulated box needs to be constructed around the HRV with a vent connection to the air in the finished basement to create conditions around the HRV consistent with the conditioned envelope of the house inside the box. If not, large temperature variations of the HRV can affect the energy conversion efficiency. INSPECTION INSP DATE PASSED COMMENTS Final JG 7/3/2024 INSPECTION INSP DATE PASSED COMMENTS CONSTRUCTION TYPE:OCCUPANT LOAD: Page 2 of 2 Fire Approval:Date:Engineering Approval:Date: PW Approval:Date:Other ( ):Date: To request an inspection: