Received: from PCH.mit.edu (18.7.21.50) by mail.efplus.com (192.168.0.8) with Microsoft SMTP Server (TLS) id 8.3.485.1; Mon, 28 Jun 2021 09:08:56 -0700 Received: from PCH.MIT.EDU (localhost.localdomain [127.0.0.1]) by PCH.mit.edu (8.14.7/8.12.8) with ESMTP id 15SFubIk015833; Mon, 28 Jun 2021 11:57:45 -0400 Received: from outgoing-exchange-1.mit.edu (OUTGOING-EXCHANGE-1.MIT.EDU [18.9.28.15]) by PCH.mit.edu (8.14.7/8.12.8) with ESMTP id 15SEq5fJ032133 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL) for ; Mon, 28 Jun 2021 10:52:05 -0400 Received: from w92exedge3.exchange.mit.edu (W92EXEDGE3.EXCHANGE.MIT.EDU [18.7.73.15]) by outgoing-exchange-1.mit.edu (8.14.7/8.12.4) with ESMTP id 15SEq27N009730 for ; Mon, 28 Jun 2021 10:52:05 -0400 Received: from oc11exhyb2.exchange.mit.edu (18.9.1.98) by w92exedge3.exchange.mit.edu (18.7.73.15) with Microsoft SMTP Server (TLS) id 15.0.1497.18; Mon, 28 Jun 2021 10:51:04 -0400 Received: from w92exhyb4.exchange.mit.edu (18.7.71.74) by oc11exhyb2.exchange.mit.edu (18.9.1.98) with Microsoft SMTP Server (TLS) id 15.0.1497.18; Mon, 28 Jun 2021 10:51:31 -0400 Received: from NAM02-BN1-obe.outbound.protection.outlook.com (104.47.51.45) by w92exhyb4.exchange.mit.edu (18.7.71.74) with Microsoft SMTP Server (TLS) id 15.0.1497.18 via Frontend Transport; Mon, 28 Jun 2021 10:51:31 -0400 Received: from DM6PR13CA0057.namprd13.prod.outlook.com (2603:10b6:5:134::34) by SN6PR0102MB3504.prod.exchangelabs.com (2603:10b6:805:4::15) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4264.20; Mon, 28 Jun 2021 14:51:31 +0000 Received: from DM6NAM11FT023.eop-nam11.prod.protection.outlook.com (2603:10b6:5:134:cafe::11) by DM6PR13CA0057.outlook.office365.com (2603:10b6:5:134::34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4287.12 via Frontend Transport; Mon, 28 Jun 2021 14:51:30 +0000 Received: from mail-yb1-f169.google.com (209.85.219.169) by DM6NAM11FT023.mail.protection.outlook.com (10.13.173.96) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4264.18 via Frontend Transport; Mon, 28 Jun 2021 14:51:30 +0000 Received: by mail-yb1-f169.google.com with SMTP id p15so18967232ybe.6 for ; Mon, 28 Jun 2021 07:51:30 -0700 (PDT) From: Mark Howles To: "piclist@mit.edu" Sender: "piclist-bounces@mit.edu" Date: Mon, 28 Jun 2021 07:51:18 -0700 Subject: [EE] HVAC filter efficiency and energy consumption Thread-Topic: [EE] HVAC filter efficiency and energy consumption Thread-Index: AddsN+Y2220I50hvRtCltNliuUanhQ== Message-ID: List-Help: List-Subscribe: , List-Unsubscribe: , Reply-To: Microcontroller discussion list - Public. Accept-Language: en-US X-MS-Exchange-Organization-AuthAs: Anonymous X-MS-Exchange-Organization-AuthSource: TS500.efplus4.local X-MS-Has-Attach: X-Auto-Response-Suppress: All X-MS-Exchange-Organization-SenderIdResult: Pass X-MS-Exchange-Organization-PRD: mit.edu X-MS-TNEF-Correlator: received-spf: Pass (protection.outlook.com: domain of gmail.com designates 209.85.219.169 as permitted sender) receiver=protection.outlook.com; client-ip=209.85.219.169; helo=mail-yb1-f169.google.com; dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=jO7Mw/FIIhd4a15WCzUnPsO+HFNXatkYPNn06GnT89I=; b=fR69BwEpoKttPOui9C/qeXoS+rKfA13i/uBTkektQw0fCSXmQvEJS2tYG4umWdicP7 X/u/IvJOMqxouhxOaO4AGaEdaOGiMd8BKjVBspWKNUBCyQDpwsnJNJgA7kkvQvvRu10i nOEYE6Cm3i6cU7EWrzmv56qAvEKFqTns3RZZ4XRJozrBQ51DziwPyKuvDGhm6YokMDzl 3LxfIlP5lg0DXZiS0gwVZURCetD+dlFCN4/3fjR0h4MVQ/DIv2vQcigCZye2M8XEEd/j K5vZ12xVkuAsjuLhQlibKEJoDdVZjbvNgFiqbj5mV3UkBDAbpa8QfhHfxBF/kckba3j5 oG8Q== authentication-results: spf=pass (sender IP is 209.85.219.169) smtp.mailfrom=gmail.com; mit.edu; dkim=pass (signature was verified) header.d=gmail.com; mit.edu; dmarc=pass action=none header.from=gmail.com; errors-to: piclist-bounces@mit.edu list-id: "Microcontroller discussion list - Public." list-post: x-beenthere: piclist@mit.edu x-mailman-version: 2.1.6 x-received: by 2002:a5b:34f:: with SMTP id q15mr30014084ybp.189.1624891890123; Mon, 28 Jun 2021 07:51:30 -0700 (PDT) x-topics: [EE] x-content-filtered-by: Mailman/MimeDel 2.1.6 x-mailman-approved-at: Mon, 28 Jun 2021 11:56:36 -0400 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Hello, I was contemplating changing my Air filters to MERV11 and was told by some people that they are bad for energy usage and air flow. I came across a study that measured and compared the effects of low efficiency and high efficiency filters and I found the technical details fascinating. Their conclusion was that effects are not significant in residential settings. Does anyone have experience with this, or have monitored this before on their own? I thought of just correlating energy consumption increase/decrease around the initial few days of installing the filter, at similar temperatures, though the paper suggests there can be a complex interaction of many variables before coming to conclusions. Here is a link to the Study: https://www.caee.utexas.edu/prof/novoselac/Publications/Novoselac_ASHRAE_Tr= ansactions_2010.pdf --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .