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			<title>Green Building Forum - Airtight House with Catflap?</title>
			<lastBuildDate>Mon, 25 May 2026 12:59:20 +0100</lastBuildDate>
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		<title>Airtight House with Catflap?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1167&amp;Focus=13290#Comment_13290</link>
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		<pubDate>Fri, 25 Jan 2008 09:15:02 +0000</pubDate>
		<author>StuartB</author>
		<description>
			<![CDATA[Is it possible to have a catflap and keep a house airtight?  ....or would you need a super dooper double glazed catflap that isn't sometimes blown open by the wind?]]>
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		<title>Airtight House with Catflap?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1167&amp;Focus=13291#Comment_13291</link>
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		<pubDate>Fri, 25 Jan 2008 09:19:47 +0000</pubDate>
		<author>tony</author>
		<description>
			<![CDATA[How about double air locked cat flap i.e. into and out of a porch.<br /><br />Even the best cat flaps are draughty, and can as you say be blown open by the wind.<br /><br />Even fully open they could represent only a very small proportion of the air leakage area of a house that passes current building regs  <img src="/newforum/extensions/Vanillacons/smilies/standard/smile.gif" alt=":smile:" title=":smile:" /><br /><br />What do you mean by air tight?]]>
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		<title>Airtight House with Catflap?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1167&amp;Focus=13295#Comment_13295</link>
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		<pubDate>Fri, 25 Jan 2008 09:55:05 +0000</pubDate>
		<author>StuartB</author>
		<description>
			<![CDATA[Tony,<br /><br />I am not in the building trade so I don't know what constitutes airtight.... It just occurred to me at 3.40am this morning when I was awoken by a rat a tat catflap.  I will need one in my earth sheltered new build (planning dependant) and just wondered if anyone had any experience of this.  <br /><br />Going by other threads some are concerned about air escaping through solid brick walls so I just thought a gaping 20cm X 20cm hole in the wall is probably not a good idea!<br /><br />I like the double airlocked idea<img src="/newforum/extensions/Vanillacons/smilies/standard/bigsmile.gif" alt=":bigsmile:" title=":bigsmile:" />]]>
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		<title>Airtight House with Catflap?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1167&amp;Focus=13296#Comment_13296</link>
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		<pubDate>Fri, 25 Jan 2008 10:36:56 +0000</pubDate>
		<author>Rimu Homes</author>
		<description>
			<![CDATA[Cats can operate simple levers, we've all seen them flush the dunny, Maybe a lever with a slight cam on it.<br /><br />I was awoken on christmas to people talking in our lounge it scared the S***e out of me, our cat had opened a toy tractor and it was singing old McDonald. Scary stuff those nursery rhymes.]]>
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		<title>Airtight House with Catflap?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1167&amp;Focus=13299#Comment_13299</link>
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		<pubDate>Fri, 25 Jan 2008 12:37:32 +0000</pubDate>
		<author>CWatters</author>
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			<![CDATA[My kids left a PMR handset on once. Woke up early in the mourning to hear the farmer next door talking to someone on his.]]>
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		<title>Airtight House with Catflap?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1167&amp;Focus=13301#Comment_13301</link>
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		<pubDate>Fri, 25 Jan 2008 13:53:33 +0000</pubDate>
		<author>Paul in Montreal</author>
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			<![CDATA[<blockquote ><cite >Posted By: CWatters</cite>Woke up early in the mourning</blockquote><br /><br />Nothing worse than falling asleep in a funeral ;)<br /><br />Paul in Montreal.]]>
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		<title>Airtight House with Catflap?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1167&amp;Focus=13429#Comment_13429</link>
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		<pubDate>Mon, 28 Jan 2008 15:03:38 +0000</pubDate>
		<author>TheDoctor</author>
		<description>
			<![CDATA[you can get cat flaps that are electrically controlled by the cat's collar.<br />This is to prevent the neighbourhood wide-boy cats enjoying your sofas<br /><br />are their any fancy electronic flaps that have a better seal? As they dont rely on a nudge from the head, maybe there is one that is a bit more 'star trek' that gives a good seal?!!]]>
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		<title>Airtight House with Catflap?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1167&amp;Focus=13454#Comment_13454</link>
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		<pubDate>Mon, 28 Jan 2008 19:48:15 +0000</pubDate>
		<author>Mike George</author>
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			<![CDATA[Hi Stuart, Are you going to incorporate a buffer space/corridor into your ESH?  A porch at one end would make sense with a double cat flap.]]>
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		<title>Airtight House with Catflap?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1167&amp;Focus=13457#Comment_13457</link>
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		<pubDate>Mon, 28 Jan 2008 20:55:18 +0000</pubDate>
		<author>StuartB</author>
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			<![CDATA[Yes we will have some sort of porch so I think I will go for the double cat flap idea.]]>
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		<title>Airtight House with Catflap?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1167&amp;Focus=17407#Comment_17407</link>
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		<pubDate>Fri, 28 Mar 2008 16:59:15 +0000</pubDate>
		<author>ildam</author>
		<description>
			<![CDATA[I've just installed a 'Pet Porte' cat flap that reads the microchip in the cats neck (so no collar required).<br />The flap itself is fairly robust compared to my old Staywell one and while not 'sealed' as such is fairly snug fitting. It's also magentised at the bottom - it would take a fairly strong direct gust to blow it open in my opinion.]]>
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		<title>Airtight House with Catflap?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1167&amp;Focus=17414#Comment_17414</link>
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		<pubDate>Fri, 28 Mar 2008 18:36:16 +0000</pubDate>
		<author>tony</author>
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			<![CDATA[It is not necessarily gusts that would worry us it is all the little gaps and cracks in and arround it as well as the lac of insulation in the thing.]]>
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		<title>Airtight House with Catflap?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1167&amp;Focus=17547#Comment_17547</link>
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		<pubDate>Mon, 31 Mar 2008 07:00:03 +0100</pubDate>
		<author>icyloft</author>
		<description>
			<![CDATA[I haven't got a cat now, as it died some years ago. However, when the cat came in and out there was always the issue of drafts, but the thing that annoyed me more was that the cat would rush in at 5 a.m. and then run up the stairs, and the noise would often wake me up. So I would opt for a "silent" cat flap, if one was available.]]>
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		<title>Airtight House with Catflap?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1167&amp;Focus=17588#Comment_17588</link>
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		<pubDate>Mon, 31 Mar 2008 20:05:25 +0100</pubDate>
		<author>John B</author>
		<description>
			<![CDATA[I suppose I'll need a dog flap when I get another house. Leaving the door open for him while he goes out for a wee does let in a bit of cold air <img src="/newforum/extensions/Vanillacons/smilies/standard/smile.gif" alt=":smile:" title=":smile:" />]]>
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		<title>Airtight House with Catflap?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1167&amp;Focus=18153#Comment_18153</link>
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		<pubDate>Tue, 08 Apr 2008 12:55:31 +0100</pubDate>
		<author>SimonH</author>
		<description>
			<![CDATA[On a plus point I came across some info that a cat emits about 11W of heat. So you can design that out of your heating system ;-) If your cat is an indoors type in the winter it might go someway to compensating for the ventilation losses. Although I think for the same heat output, natural gas or even LPG is probably a lot cheaper than Whiskas cat food. <br /><br />You could design a spring loaded cat flap which makes a good seal with the door. This would allow the cat to get out for doing you know what, but it would have to wait till you get back home to come back in and so you'd need to make him a little eco yurt in the back garden.<br /><br />Have you though about a hamster instead? You could run a small LED light off a dynamo attached to the wheel :-)<br /><br />Simon]]>
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		<title>Airtight House with Catflap?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1167&amp;Focus=18290#Comment_18290</link>
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		<pubDate>Thu, 10 Apr 2008 16:10:02 +0100</pubDate>
		<author>chipedwood</author>
		<description>
			<![CDATA[erm, whats wrong with opening the door or window when the cat wants in or out? <br /><br />I've had cats for year and still do. Never used a cat flap. Just let the mew at you when they want out or in. They learn soon enough which windows are by your computer or living room to get your attention. <br /><br />Unless you cats are quite old? But then they tend to stay in more.]]>
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		<title>Airtight House with Catflap?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1167&amp;Focus=20153#Comment_20153</link>
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		<pubDate>Wed, 07 May 2008 19:12:37 +0100</pubDate>
		<author>mrswhitecat</author>
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			<![CDATA[Our puss uses the cat flap as a gloried door knocker.  He bats it and bats it and eventually we give in and come and open the door for him.  I'd not given the heat loss a thought.  If we made him run around a lot would we get more than 11W of heat to pay us back?]]>
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		<title>Airtight House with Catflap?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1167&amp;Focus=20156#Comment_20156</link>
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		<pubDate>Wed, 07 May 2008 19:36:02 +0100</pubDate>
		<author>fostertom</author>
		<description>
			<![CDATA[<blockquote ><cite >Posted By: SimonH</cite>a cat emits about 11W of heat</blockquote>Quote I saw by Amory Lovins: " I recommend a 150W dog, which can be turned up to 300W by throwing a ball".]]>
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		<title>Airtight House with Catflap?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1167&amp;Focus=20169#Comment_20169</link>
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		<pubDate>Wed, 07 May 2008 20:49:13 +0100</pubDate>
		<author>Arran</author>
		<description>
			<![CDATA[Our cat can not use a flap even after 12 years. We bow down and open the door every time. I did do plans for a flap that 'slides' when pushed and closed after a period of time (magnetic or spring). This made a better seal. I am in the process of a new build design and an extension and would love to try this out, problem is the electric or battery power circuit required, oh and the cats age. Regarding pressure testing does any one know the difference as tests are commonly done on front doors and flaps are on the rear and new builds never really have a cat flap installed.]]>
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		<title>Airtight House with Catflap?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1167&amp;Focus=20175#Comment_20175</link>
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		<pubDate>Wed, 07 May 2008 21:22:00 +0100</pubDate>
		<author>ludite</author>
		<description>
			<![CDATA["On a plus point I came across some info that a cat emits about 11W of heat."<br /><br />But they are so well insulated, you're not considering shaving it are you?]]>
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		<title>Airtight House with Catflap?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1167&amp;Focus=20200#Comment_20200</link>
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		<pubDate>Thu, 08 May 2008 09:35:59 +0100</pubDate>
		<author>StuartB</author>
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			<![CDATA[How did we get from airtight house to shaving pussies?]]>
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		<title>Airtight House with Catflap?</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1167&amp;Focus=20275#Comment_20275</link>
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		<pubDate>Fri, 09 May 2008 08:44:24 +0100</pubDate>
		<author>ludite</author>
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			<![CDATA[<img src="/newforum/extensions/Vanillacons/smilies/happy/clap.gif" alt=":clap:" title=":clap:" />]]>
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