<ul>
    <li>For the air-conditioner, ensure that the installation meets our safety requirements. The condenser unit/ bracket should only be mounted on concrete or brick walls</li>
    <li>Monitor the stainless steel brackets which hold up the unit for signs of corrosion and rust </li>
    <li>Look out for any signs of leaking </li>
    <li>The piping for the condenser unit should be secure and run into your flat, with the condensed water discharged into a nearby floor trap</li>
</ul>
<h3>Flat interior</h3>
<ul>
    <li>Inside your flat, air-conditioner brackets should be mounted only on concrete/ brick walls.</li>
    <li>Air-conditioner brackets should not be mounted on the timber frame</li>
</ul>
<h4>Points to note</h4>
<ul>
    <li>The stainless steel brackets should be mounted securely on the bricks/ concrete walls</li>
    <li>The air-conditioner bracket/ condensing unit should not be corroded or rusty</li>
    <li>Ensure proper insulation of air-conditioner condensing unit</li>
    <li>Ensure there is no leakage of condensation water</li>
    <li>All piping for the air-conditioner condensing unit must run internally and the condensation water should properly discharge into a nearby internal floor trap</li>
    <li>Consider installing <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/home-care-guide/air-conditioners/Polymer-patented-air-con-tray.pdf" target="_blank">HDB&rsquo;s patented air-conditioner tray</a> (PDF, 337KB) if your condensing unit is leaking. Please note that the service between you and the vendor is on a private arrangement basis. HDB will not be responsible for any issues between you and the vendor relating to the product</li>
</ul>
<h5>What to avoid</h5>
<p><img alt="" src="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/home-care-guide/air-conditioners/Air-con-What-to-avoid.jpg?h=213&amp;w=901&amp;hash=420653AFB556EC66713A159C8A8D1004" /></p>
<p> </p>
<h5>What to follow</h5>
<p><img alt="" src="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/home-care-guide/air-conditioners/Air-con-What-to-follow.jpg?h=214&amp;w=900&amp;hash=42AB14854BCE7B2BFE813AE925BF9FAA" /></p>
<p>Do check with the air-conditioner serviceman if there is a need to replace a corroded/ rusty air-conditioner unit. Regular maintenance of the air-conditioner and the supporting frame helps prevent the risk of it getting dislodged, thereby ensuring public safety.</p>
<p>An air-conditioner that is improperly installed or maintained can cause serious injury or death to members of the public walking below your flat when it falls.</p>

What to look out for 

<h3>Approved locations and installation methods</h3>
<p>This <a rel="noopener noreferrer" href="https://youtu.be/cwenuX7B5qw" target="_blank">video</a> illustrates the steps for air-conditioner installation and maintenance.</p>
<h4>Conventional flats</h4>
<p>The following installation guidelines must be followed for conventional flats.</p>
<table>
    <tbody>
        <tr>
            <td rowspan="2"><strong>Type of Flats</strong></td>
            <td rowspan="2"><strong>Location of Air-Conditioner</strong></td>
            <td rowspan="2"><strong>Position of Air-Conditioner</strong></td>
            <td colspan="2"><strong>Installation Method</strong></td>
        </tr>
        <tr>
            <td><strong>Split-unit Air-Conditioning Unit</strong></td>
            <td><strong>Window Unit</strong></td>
        </tr>
        <tr>
            <td colspan="2">Flats with air-conditioner ledge</td>
            <td>On concrete air-conditioner ledge</td>
            <td>Drawing <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/professional-help-and-contractors/air-conditioners/drawing-k.pdf" target="_blank">K</a><br />
            (PDF, 31KB)</td>
            <td>N/A</td>
        </tr>
        <tr>
            <td rowspan="7">Flats without air-conditioner ledge</td>
            <td rowspan="3">
            <div>Master bedroom</div>
            </td>
            <td>Within air-conditioner opening</td>
            <td>Drawings<br />
            <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/professional-help-and-contractors/air-conditioners/drawing-a1.pdf" target="_blank">A1</a> (PDF, 40KB), <br />
            <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/professional-help-and-contractors/air-conditioners/drawing-a2.pdf" target="_blank">A2</a> (PDF, 46KB), <br />
            <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/professional-help-and-contractors/air-conditioners/A3-air-con-drawing.pdf" target="_blank">A3</a> PDF, 110KB), <br />
            <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/professional-help-and-contractors/air-conditioners/drawing-g1.pdf" target="_blank">G1</a> (PDF, 39KB), <br />
            <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/professional-help-and-contractors/air-conditioners/drawing-g2.pdf" target="_blank">G2</a> (PDF, 49KB)<br />
            <br />
            </td>
            <td>Drawings <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/professional-help-and-contractors/air-conditioners/drawing-b1.pdf" target="_blank">B1</a><br />
            (PDF, 38KB)<br />
            <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/professional-help-and-contractors/air-conditioners/drawing-b2.pdf" target="_blank">B2</a><br />
            (PDF, 38KB)</td>
        </tr>
        <tr>
            <td>At parapet below window nearest to bedroom door (when existing air-conditioner opening is not suitable for installation of air-conditioning unit)</td>
            <td>Drawing <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/professional-help-and-contractors/air-conditioners/drawing-c.pdf" target="_blank">C</a><br />
            (PDF, 31KB)</td>
            <td>N/A</td>
        </tr>
        <tr>
            <td>Air-conditioner cabinet</td>
            <td>Drawings<br />
            <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/professional-help-and-contractors/air-conditioners/drawing-j1.pdf" target="_blank">J1</a> (PDF, 92KB)<br />
            <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/professional-help-and-contractors/air-conditioners/drawing-j3.pdf" target="_blank">J3</a> (PDF, 87KB)<br />
            <br />
            </td>
            <td>Drawing <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/professional-help-and-contractors/air-conditioners/drawing-j2.pdf" target="_blank">J2</a><br />
            (PDF, 82KB)</td>
        </tr>
        <tr>
            <td>
            <div>Other bedrooms</div>
            </td>
            <td>On window sill nearest to bedroom door (originally provided by HDB)</td>
            <td>N/A</td>
            <td>Drawing <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/professional-help-and-contractors/air-conditioners/drawing-d.pdf" target="_blank">D</a><br />
            (PDF, 32KB)</td>
        </tr>
        <tr>
            <td>
            <div>Study-cum-bedroom (where sliding doors are provided)</div>
            </td>
            <td>On extreme left of window sill when viewed from bedroom door (originally provided by HDB)</td>
            <td>N/A</td>
            <td>Drawing <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/professional-help-and-contractors/air-conditioners/drawing-d.pdf" target="_blank">D</a><br />
            (PDF, 32KB)</td>
        </tr>
        <tr>
            <td>
            <div>Service balcony</div>
            </td>
            <td>On the floor of service balcony or on the walls of the unit within service balcony (any other locations are subjected to HDB's approval)</td>
            <td>N/A<br />
            </td>
            <td>N/A</td>
        </tr>
        <tr>
            <td>
            <div>Kitchen <br />
            (applicable for 1- and 2-room flats only)</div>
            </td>
            <td>At brick or reinforced concrete parapet wall below window only</td>
            <td>Drawing <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/professional-help-and-contractors/air-conditioners/drawing-c.pdf" target="_blank">C</a><br />
            (PDF, 31KB)</td>
            <td>N/A</td>
        </tr>
    </tbody>
</table>
<h4><strong>Flats with precast facade</strong></h4>
<p>The following installation guidelines must be followed for flats that have their external surface covered with tiles or other finishes.</p>
<table>
    <tbody>
        <tr>
            <td rowspan="2"><strong>Type of Flats</strong></td>
            <td rowspan="2"><strong>Location of Air-Conditioner</strong></td>
            <td rowspan="2"><strong>Position of Air-Conditioner</strong></td>
            <td colspan="2"><strong>Installation Method</strong></td>
        </tr>
        <tr>
            <td><strong>Split-unit Air-Conditioning Unit</strong></td>
            <td><strong>Window Unit</strong></td>
        </tr>
        <tr>
            <td colspan="2">Flats with air-conditioner ledge</td>
            <td>On concrete air-conditioner ledge</td>
            <td>Drawing <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/professional-help-and-contractors/air-conditioners/drawing-k.pdf" target="_blank">K</a><br />
            (PDF, 31KB)</td>
            <td>N/A</td>
        </tr>
        <tr>
            <td rowspan="8">Flats without-air conditioner ledge</td>
            <td rowspan="4">
            <div>Master bedroom</div>
            </td>
            <td>Within air-conditioner opening</td>
            <td>Drawings<br />
            <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/professional-help-and-contractors/air-conditioners/drawing-a1.pdf" target="_blank">A1</a> PDF, 40KB),<br />
            <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/professional-help-and-contractors/air-conditioners/drawing-a2.pdf" target="_blank">A2</a> (PDF, 46KB), <br />
            <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/professional-help-and-contractors/air-conditioners/A3-air-con-drawing.pdf" target="_blank">A3</a> (PDF, 110KB),<br />
            <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/professional-help-and-contractors/air-conditioners/drawing-g1.pdf" target="_blank">G1</a> (PDF, 39KB),<br />
            <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/professional-help-and-contractors/air-conditioners/drawing-g2.pdf" target="_blank">G2</a> (PDF, 49KB)<br />
            <br />
            </td>
            <td>Drawings <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/professional-help-and-contractors/air-conditioners/drawing-b1.pdf" target="_blank">B1</a><br />
            (PDF, 38KB)<br />
            <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/professional-help-and-contractors/air-conditioners/drawing-b2.pdf" target="_blank">B2</a><br />
            (PDF, 38KB)</td>
        </tr>
        <tr>
            <td>On window sill nearest to bedroom door (when existing air-conditioner opening is not suitable for installation of air-conditioning unit)</td>
            <td>Drawing <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/home-care-guide/air-conditioners/drawing-f.pdf" target="_blank">H</a><br />
            (PDF, 36KB)</td>
            <td>Drawing <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/home-care-guide/air-conditioners/drawing-f.pdf" target="_blank">F</a><br />
            (PDF, 35KB),</td>
        </tr>
        <tr>
            <td>At parapet below window nearest to bedroom door (when existing air-conditioner opening is not suitable for installation of air-conditioning unit)</td>
            <td>Drawings<br />
            <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/professional-help-and-contractors/air-conditioners/drawing-c.pdf" target="_blank">C</a> (PDF, 31KB),<br />
            <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/home-care-guide/air-conditioners/drawing-e1.pdf" target="_blank">E1</a> (PDF, 38KB),<br />
            <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/home-care-guide/air-conditioners/drawing-e2.pdf" target="_blank">E2</a> (PDF, 33KB)<br />
            </td>
            <td>N/A</td>
        </tr>
        <tr>
            <td>Air-conditioner cabinet</td>
            <td>Drawings<br />
            <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/professional-help-and-contractors/air-conditioners/drawing-j1.pdf" target="_blank">J1</a> (PDF, 92KB),<br />
            <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/professional-help-and-contractors/air-conditioners/drawing-j2.pdf" target="_blank">J3</a> (PDF, 87KB)<br />
            </td>
            <td>Drawing <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/professional-help-and-contractors/air-conditioners/drawing-j2.pdf" target="_blank">J2</a><br />
            (PDF, 82KB),</td>
        </tr>
        <tr>
            <td>
            <div>Other bedrooms</div>
            </td>
            <td>On window sill nearest to bedroom door (originally provided by HDB)</td>
            <td>N/A</td>
            <td>Drawing <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/professional-help-and-contractors/air-conditioners/drawing-d.pdf" target="_blank">D</a><br />
            (PDF, 32KB),</td>
        </tr>
        <tr>
            <td>
            <div>Study-cum-bedroom (where sliding doors are provided)</div>
            </td>
            <td>On extreme left of window sill when viewed from bedroom door (originally provided by HDB)</td>
            <td>N/A</td>
            <td>Drawing <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/professional-help-and-contractors/air-conditioners/drawing-d.pdf" target="_blank">D</a><br />
            (PDF, 32KB),</td>
        </tr>
        <tr>
            <td>
            <div>Service balcony</div>
            </td>
            <td>
            <p>On the floor of service balcony or on walls of the unit within service balcony (any other locations are subjected to HDB's approval)</p>
            </td>
            <td><span>N/A <br />
            </span></td>
            <td>N/A</td>
        </tr>
        <tr>
            <td>
            <div>Kitchen <br />
            (applicable for 1- and 2-room flats only)</div>
            </td>
            <td>At brick or reinforced concrete parapet wall below window only</td>
            <td>Drawing <a href="/-/media/managing-my-home/renovation-and-maintenance/home-maintenance/professional-help-and-contractors/air-conditioners/drawing-c.pdf" target="_blank">C</a><br />
            (PDF, 31KB),</td>
            <td>N/A</td>
        </tr>
    </tbody>
</table>

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