80 useful answers · Page 2 of 4

Home energy & comfort: page 2

Find drafts, understand insulation and window ratings, and use heating and cooling controls more effectively.

Search this topic

How do I choose the correct size of pipe-insulation sleeve?

Match the sleeve’s inside diameter to the pipe’s outside diameter so it fits closely. Measure the actual pipe before buying, rather than guessing from a trade size printed on a fitting. Select insulation intended for the pipe and conditions, and follow its installation directions. A sleeve that leaves large gaps or must be forced closed is not a good fit.

Where does wall insulation go when water pipes run in an exterior wall?

The wall cavity should be air-sealed, with suitable insulation between the pipes and the exterior side of the wall. The pipes may also need their own insulation. This is an assembly detail to plan before closing the wall, not a reason to stuff material blindly around existing plumbing. Have the contractor account for both heat loss and cold-air movement.

What does a window’s U-factor tell me?

U-factor describes how readily heat transfers through the window assembly. A lower number means better insulating performance, which is especially useful for reducing heat loss in cold climates. Compare ratings for the actual window model and configuration rather than relying on price or frame appearance. Also consider solar heat gain, because insulation alone does not describe every aspect of performance.

How do I compare how much daylight different windows let in?

Look at visible transmittance, usually abbreviated VT on the performance information. Higher values mean more visible light passes through. This is separate from the solar heat gain rating, so a window’s heat-control claim does not tell you exactly how bright the room will feel. Compare the complete rated products, including the frame and glazing configuration you plan to order.

How can I compare energy claims for window shades and attachments?

Look for an independent rating such as certification from the Attachments Energy Rating Council, rather than comparing only marketing descriptions. Its program evaluates window attachments including shades and storm windows using standardized methods. Use the rated product and relevant climate information when comparing options. Treat energy performance as one factor alongside fit, daylight, privacy, and ease of use.

What does the Home Energy Yardstick score mean?

It compares a home’s actual energy use over the previous twelve months with similar homes, accounting for weather, home size, and occupants. A higher score indicates lower use relative to those peers. Gather complete energy records rather than judging from a single unusually cold month. The comparison is not designed to give a reliable score for every housing type, including apartments.

Does a good energy score replace a professional home energy assessment?

No. A comparison score summarizes energy use; it does not inspect the building or identify each hidden cause of discomfort. A professional assessment can investigate why a particular room is drafty or bills remain high. Use the score to track broad performance and decide where to investigate, rather than treating it as proof that all insulation and equipment are sound.

Should I compress fiberglass insulation behind pipes and wiring?

Avoid squeezing a full batt into a tight obstruction and assuming its labeled performance remains unchanged. Fit insulation around services as directed so the intended thickness and coverage are maintained, without gaps or crushed areas. Follow the product’s handling precautions. If the cavity cannot accommodate the required assembly, resolve that detail instead of forcing in more material.

Which direction should a second layer of attic insulation batts run?

Where the assembly calls for added batts over an existing layer between joists, the next layer commonly runs across the joists. That covers the framing and reduces gaps in the overall insulation layer. Preserve required ventilation and clearances around heat-producing equipment. Check the complete installation instructions, including facing and moisture-control requirements, before adding another layer.

Will stuffing fiberglass around a replacement window stop air leaks?

Fibrous insulation alone does not create a dependable air seal. The gap between the unit and its rough opening needs an appropriate sealing detail before trim hides it, using compatible materials such as caulk, backer rod, or low-expansion window-and-door foam. Follow the window manufacturer’s instructions and keep designed drainage routes clear rather than filling every visible opening.

When should the gap around a replacement window be air-sealed?

Complete the rough-opening air seal before installing the interior trim that covers it. This makes the gap accessible and lets you check continuity around the unit. Coordinate the seal with the window’s installation and drainage details. Attractive casing can hide an unfinished air barrier, so confirm that step instead of assuming new trim means the opening is sealed.

Should I replace my HVAC system immediately if the house is uncomfortable?

Have it evaluated, but also check major building air leaks and duct problems before assuming replacement is the only answer. Those losses can leave rooms uncomfortable even when the equipment works. Ask the contractor to consider the house and distribution system together, then explain which faults a replacement would solve and which require separate repairs.

Why is Cool On blinking on my thermostat without the air conditioner starting?

On many Honeywell Home models, a flashing cooling message means the compressor-protection timer is delaying a restart. Leave the settings alone for the normal delay, which can be up to five minutes. Repeatedly switching modes does not help. If the message persists beyond the model’s normal delay, check its troubleshooting guidance and arrange service rather than bypassing the protection.

Why does air keep coming from the vents after heating has stopped?

Check whether the thermostat’s fan setting is On rather than Auto. On requests continuous air circulation even when heating or cooling is not active; Auto generally runs the fan with a heating or cooling call. Some equipment also has a normal short blower overrun. If the behavior continues unexpectedly with the proper setting, consult the equipment manual or service provider.

Can I use a Honeywell T5 or T6 Pro Wi-Fi thermostat without the app?

Yes. The supported models can be configured at the thermostat and operated manually without connecting to Wi-Fi. When opting out of Wi-Fi, set the time and date as prompted. The equipment type still must be configured correctly; skipping the app is not permission to guess installer settings. Online control and connected features need their required network and account setup.

Source checks for these answers: September 22, 2026. Product instructions and local requirements can vary.