diff --git a/hbd/server/settings.py b/hbd/server/settings.py
index 68eb7c5..5200ef8 100644
--- a/hbd/server/settings.py
+++ b/hbd/server/settings.py
@@ -284,7 +284,10 @@ def get_settings_sections(config: dict, threshold_checker=None) -> list:
             "owner": hcfg.get("owner", ""),
             "managers": hcfg.get("managers", []),
             "monitors": hcfg.get("monitors", []),
-            "threshold_config": hcfg.get("threshold_config", ""),
+            "threshold_configs": (
+                list(v) if isinstance(v := hcfg.get("threshold_config"), list)
+                else ([v] if v else [])
+            ),
             "notification_channels": hcfg.get("notification_channels", []),
         })
 
diff --git a/hbd/server/templates/settings.html b/hbd/server/templates/settings.html
index 806f65d..2a55dc5 100644
--- a/hbd/server/templates/settings.html
+++ b/hbd/server/templates/settings.html
@@ -591,10 +591,9 @@
                       </select>
                     </td>
                     <td>
-                      <select class="field-input host-tc">
-                        <option value="">— none —</option>
+                      <select class="field-input host-tc" multiple size="{{ [all_threshold_configs|length, 4]|min or 2 }}">
                         {% for tc in all_threshold_configs %}
-                        <option value="{{ tc | e }}" {% if h.threshold_config == tc %}selected{% endif %}>{{ tc | e }}</option>
+                        <option value="{{ tc | e }}" {% if tc in h.threshold_configs %}selected{% endif %}>{{ tc | e }}</option>
                         {% endfor %}
                       </select>
                     </td>
@@ -981,8 +980,8 @@
           if (managers.length) entry.managers = managers;
           const monitors = [...(row.querySelector('.host-monitors')?.selectedOptions || [])].map(o => o.value);
           if (monitors.length) entry.monitors = monitors;
-          const tc = row.querySelector('.host-tc').value;
-          if (tc) entry.threshold_config = tc;
+          const tcs = [...(row.querySelector('.host-tc')?.selectedOptions || [])].map(o => o.value);
+          if (tcs.length) entry.threshold_config = tcs;
           const chs = [...(row.querySelector('.host-channels')?.selectedOptions || [])].map(o => o.value);
           if (chs.length) entry.notification_channels = chs;
           return entry;
@@ -1007,9 +1006,7 @@
         const tbody = document.getElementById('hosts-tbody');
         const sz = n => Math.min(Math.max(n, 1), 4);
         const usersOpts = _allUsers.map(u => `<option value="${escHtml(u)}">${escHtml(u)}</option>`).join('');
-        const tcOpts = ['<option value="">— none —</option>'].concat(
-          _allThresholdConfigs.map(t => `<option value="${escHtml(t)}">${escHtml(t)}</option>`)
-        ).join('');
+        const tcOpts = _allThresholdConfigs.map(t => `<option value="${escHtml(t)}">${escHtml(t)}</option>`).join('');
         const chOpts = _allChannels.map(c => `<option value="${escHtml(c)}">${escHtml(c)}</option>`).join('');
         const row = document.createElement('tr');
         row.setAttribute('data-new-host', 'true');
@@ -1020,7 +1017,7 @@
           <td><input class="field-input host-owner" placeholder="(none)" style="min-width:90px"></td>
           <td><select class="field-input host-managers" multiple size="${sz(_allUsers.length)}">${usersOpts}</select></td>
           <td><select class="field-input host-monitors" multiple size="${sz(_allUsers.length)}">${usersOpts}</select></td>
-          <td><select class="field-input host-tc" size="${sz(_allThresholdConfigs.length)}">${tcOpts}</select></td>
+          <td><select class="field-input host-tc" multiple size="${sz(_allThresholdConfigs.length)}">${tcOpts}</select></td>
           <td><select class="field-input host-channels" multiple size="${sz(_allChannels.length)}">${chOpts}</select></td>
           <td><button class="btn-danger" onclick="this.closest('tr').remove()">✕</button></td>`;
         tbody.appendChild(row);